Seismic Evaluation And Rehabilitation for Buildings - index
Chapter 1. Introduction - ufc_3_301_05a0013
Basis for Evaluation And Rehabilitation
Existing Buildings
Figure 1-1. Flow Chart for Structural And Nonstructural Evaluation
Background - ufc_3_301_05a0017
Ther Military Risk Reduction Program
Chapter 2. Building Data Acquisition And Classification
Table 2-1. Preliminary Determinations for Structural And Nonstructural Evaluations
Table 2-2. Seismic Use Groups
Table 2-2. Seismic Use Groups - Continued
Table 2-3. Structural Performance Levels
Table 2-4. Performance Objectives
Figure 2-1. Performance And Structural Deformation Demand for Ductile Structures
Figure 2-2. Performance and Structural Deformation Demand for Nonductile Structures
Table 2-5a. Seismic Design Category Based On 1-Second Response Acceleations
Chapter 3. Geological Hazards Evaluation
Chapter 4. Tier 1 Evaluation ( Screening)
Table 4-1. Preliminary Assessment for Structural Evaluations
Table 4-2. Structural Screening ( Tier1)
Tier 1 Structural Checklists
Preliminary Assessment.
Table 4-4. Preliminary Nonstructural Assessment
Table 4-5. Nonstructural Screening (Tier1)
Chapter 5. Tier 2 And Tier 3 Evaluations
Structural System Evaluations
Table 5-1. Structural Evaluation (Tier2)
Acceptance Criteria - ufc_3_301_05a0042
Tier 3 Procedures
Nonstructural Systems Evaluation
Chapter 6. Final Assessment And Report
Table 6-1. Final Assessment
Final Nonstructural Assessment
Evaluation Report - ufc_3_301_05a0048
Table 6-2. Evaluation Report
Appendices to the Evaluation Report Shall Include
Chapter 7. Rehabilitation of Structural Systems
Table 7-1. Rehabilitation Procedures
Figure 7-1. Rehabilitation Procedures
Supplementary Analysis.
Analytical Procedures.
Linear Procedures
Nonlinear Procedure.
Figure 7-2. Idealized Component Load Versus Deformation Curves for Depicting Component Modeling And Acceptability
Preparation of Contract Documents
Chapter 8. Rehabilitation Techniques for Structural Systems
Rehabilitation Techniques For Structural Components
Table 8-1. Strengthening Options for Reinforced Concrete Or Masorny Shear Wall Buildings
Table 8-1. Strengthening Options for Reinforced Concrete Or Masorny Shear Wall Buildings - Continued
Strengthening Techniques For Shear Capacity
Figure 8-1. Carbon Fiber Overlay to Enhance Shear Capacity of Masonry Wall
Figure 8-2. Strengthening of An Unreinforced Masonry Wall
Strengthening Techniques For Coupling Beams
Figure 8-3. Carbon Fiber Overlay to Enhance Flexural Capacity of Masonry Wall
Precast Concrete Shear Walls
Strengthening Techniques For Inadequate Interpanel Capacity
Unreinforced Masonry Shear Walls
Table 8-2. Strengthening Options for Unreinforced Concrete for Masorny Buildings
Table 8-2. Strengthening Options for Unreinforced Concrete for Masorny Buildings - Continued
Strengthening Techniques For Inadequate In-Plane Shear and Out-of-Plane Flexural Capacity
Redistribution.
Moment Frames
Table 8-3. Strengthening Options for Steel Moment -Resisting Frame Buildings
Table 8-3. Strengthening Options for Steel Moment -Resisting Frame Buildings - Continued - ufc_3_301_05a0079
Table 8-3. Strengthening Options for Steel Moment -Resisting Frame Buildings - Continued - ufc_3_301_05a0080
Strengthening Techniques For Inadequate Beam/Column Joints
Strengthening Techniques For Inadequate Panel Zone Capacity
Figure 8-4. Rehabilitation of A Welded Moment Connection
Figure 8-5. Rehabilitation of A Bolted Moment Connection
Figure 8-6. Strenthening a Pre-Northridge Moment Connection
Techniques For Reducing Drift
Concrete Moment Frames. - ufc_3_301_05a0087
Table 8-4. Strengthening Options for Reinforced Concrete Frame Buildings
Table 8-4. Strengthening Options for Reinforced Concrete Frame Buildings - Continued
Figure 8-7. FRP Overlay to Enhance the Shear And Flexural Capacity Concrete Beams
Strenghtening Techniques for Inadedquate Joint Shear Capacity.
Precast Concrete Moment Frames
Deficiencies
StrengtheiningTechniques for Other Deficiencies
Figure 8-8. Strengthening A Beam Shear Connection
The Principal Deficiencies Of Steel Concentrically Braced Frames Are
Figure 8-9. Strengthening of A Column Splice
Table 8-5. Strengthening Options for Steel- Braced-Frame Buildings
Table 8-5. Strengthening Options for Steel- Braced-Frame Buildings - Continued
Strengthening Techniques for Inadequate Brace Capacity
Figure 8-10. Strengthening of Single-Angle Bracing
Figure 8-11. Strengthening an Existing Brace With Secondary Bracing
Strengthening Techniques for Inadequate Axial Load Capacity
Deficiencies
Concrete Diaphragms. - ufc_3_301_05a0105
Strengthening Tecniques for Inadequate Flexural Capacity.
Strengthening Techniques for Inadequate Shear Or Tensile Capacity At Openings
Poured Gypsum Diaphragms
Strengthening Techniques for Inadequate Chord or Collector Capacity
Steel Deck Diaphragms
New Horizontal Bracing.
Figure 8-12. Providing Shear Transfer for Steel Decking on Steel Joists At Exterior Wall.
Additional Shear Walls Or Vertical Bracing.
Figure 8-13. Modifying Simple Beam Connection to Provide Chord Tension Capacity.
Timber Diaphragms.
Strengthening Techniques for Inadequate Chord Capacity.
Figure 8-14. Strengthening Of a Timber Diaphragm
Figure 8-15. Chord Splice For Wood Diaphragm
Figure 8-16. Providing New Chords for Wood Diaphragms
Strengthening Techniques for Excessive Shear Stresses
Horizontal Steel Bracing
Foundations.
Strengthening Techniques For Excessive Uplift Conditions
Individual Pier Column Footings.
Strengthening Techniques for Execessive Uplift Conditions
Figure 8-17. Strengthening An Existing Spread Footing
Piles or Drilled Piers.
Mat Foundations
Rehabilitation Techniques for Connections
Connections of Poured Gypsum Diaphragms.
Connections Of Precast Concrete Diaphragms.
Connections of Steel Deck Diaphgrams Without Concrete Fill.
Connections Of Steel Deck Diaphragms with Concrete Fill.
Figure 8-18. Strengthening Steel Decking Support for Shear Transfer And Wall Anchorage
Connections Of Horizontal Steel Bracing.
Connections In Timber Diaphragms.
Strengthening Techniques for In-Plane Shear Transfer Capacity to Exterior Walls
Strengthening Techniques for Inadeguate Out-of-Plane Anchorage
Foundation Connections.
Connections Of Braced Frames.
Figure 8-19. Steel Plate Anchorage For Precast Concrete Wall Panels
Connection of Steel Moment Frames
Figures 8-20. Strengthening of A Column Base Plate in A Braced Frame
Rehabilitation With Protective Systems
Energy Dissipation
Chapter 9. Rehabilitation Strategies And Tecniques For NonStructural Systems
Rehabilitation Criteria for Nonstructural Components
Exterior Curtain Walls.
Partitions
Rehabilitation Of Nonstructural Mechanical And Electrical Components
Ductwork and Piping
Emergency Power Systems.
Hazardous Materials Storage Systems.
Equipment that is Vibration Sensitive
Chapter 10. Quality Assurance/Quality Control
Evaluation
Construction - ufc_3_301_05a0159
Appendix B. Symbols And Notations - ufc_3_301_05a0163
Appendix B. Symbols And Notations - Continued - ufc_3_301_05a0164
Appendix C. Glossary - ufc_3_301_05a0165
Appendix C. Glossary - Continued - ufc_3_301_05a0166
Appendix C. Glossary - Continued - ufc_3_301_05a0167
Appendix C. Glossary - Continued - ufc_3_301_05a0168
Appendix C. Glossary - Continued - ufc_3_301_05a0169
Appendix C. Glossary - Continued - ufc_3_301_05a0170
Appendix C. Glossary - Continued - ufc_3_301_05a0171
Appendix C. Glossary - Continued - ufc_3_301_05a0172
Appendix C. Glossary - Continued - ufc_3_301_05a0173
Appendix C. Glossary - Continued - ufc_3_301_05a0174
Appendix C. Glossary - Continued - ufc_3_301_05a0175
Appendix D. Structural Example Problems
D1 Three- Strory Barracks Building
Longitudinal Building Elevation
Framing Roof Level
Foundation Plan
Section 1 Through Footing
Column and Beam Cross Sections
Preliminary Determinations ( FromTable 2-1)
Preliminary Structural Assessment ( From Table 4-1)
Condition Of Foundations - ufc_3_301_05a0187
Basic Structural Checklist for Building Type C1: Concrete Moment Frames
Lateral- force Resisting System
Supplemental Structural Checklist For building Type C1: Concrete Moment Frames
Diaphragms
Connections - ufc_3_301_05a0192
Basic Structural Checklist For Building Type C2: Concrete Shear Wall Buildings with Stiff Diaphragms
Lateral force- Resisting System
Supplemental Structural Checklist For Building Type C2
Connections - ufc_3_301_05a0196
Determine Building Seismic Weight.
Determine Mapped Spectral Acceleration ( Per FEMA 310 Section 3.5.2.3.1)
Axial Stress Due to Overturning ( Per FEMA 310 Section 3.5.3.6):
Interior Perimeter Columns
Exterior Perimeter Columns
Strong Column/Weak Beam
Deflection Compatibility
Transverse Direction: Reinforced Concrete Shear Walls
Reinforcing Steel
Structural Evaluation
Determine the Building And Component Forces And Displacements - ufc_3_301_05a0207
Analysis Results
Deformation- Controlled Actions - ufc_3_301_05a0209
Force- Controlled Actions
Nominal Shear Capacity
Joint Shear Forces
Acceptance Criteria - ufc_3_301_05a0213
Acceptance Criteria - Continued - ufc_3_301_05a0214
Force- Controlled Actions.
Structural Evaluation ( Tier 3) from Table 5-2
Final Assessment ( From Table 6-1) - ufc_3_301_05a0217
Nonstructural Evaluation Assessment.
Building Rehabilitation Concept
Evaluation Report (from table 6-2)
Seismic Rehabilitaion Design (Chapter 7)
Analysis Of Structure Using The Linear Static Procedure (LSP) - ufc_3_301_05a0222
Mathematical Modeling Assumptions ( Per FEMA 273 Section 3.2.2):
Component Gravity Loads
Check of Deformation - Controlled Components
Typical Wall Cross- Section
The Flexural Strenght of the Wall is Determined Using The Program BIAX
Development Length Of Longitudinal Reinforcing Steel At The Base of The Wall Per ACI 318 Chapter 21
Check Of Column Members
Check Of Force - Controlled Components
Shear Forces In New Wall Segments
Typical Shear Wall Elevation
Column Shear
Beam Shear - ufc_3_301_05a0234
Joint Shear
Lenght Along Wall (ft)
Cross Section Of New Extended Footing
Check Soil Capacity
Shear Strenght of Transverse Walls
Prepare Construction Documents
Two- Story Steel Moment Frame Building
Roof Framing - ufc_3_301_05a0242
Second Floor Framing
Column Footing Elevation And Plan View
Typical Section At Exterior Wall
Preliminary Determinations ( from Table 2-1) - ufc_3_301_05a0246
Preliminary Structural Assessment ( from Table -4-1)
Determine the Pseudo Lateral Forces in Accordance with FEMA 310 sec 4.2.2.1.1
Determine The building And Component Forces And Displacements - ufc_3_301_05a0249
Acceptance Criteria - ufc_3_301_05a0250
Acceptance Criteria - Continued - ufc_3_301_05a0251
Force-Controlled Actions
Steel Beam - Column Connections
Steel Beam - Column Connections - Continued
Evaluation Results
Final Assessment ( from Table 6-1) - ufc_3_301_05a0256
Rehabilitation ( from Table 7-1) - ufc_3_301_05a0257
Brace And Gusset Details At Column Base
Confirming Evaluation Of Rehabilitation - ufc_3_301_05a0259
Pushover Analysis
Brace Axial Hinges
Brace Axial Hinges - Continued
Bottom Brace Axial Model
Beam Hinges
Column Hinges
Conduct Pushover Analysis Of Structure
Determine Target Displacement
Determine Actions and Deformations
Deformation-Controlled Actions
Deformation-Controlled Actions - Continued
Check of Gusset Plates and Bracing Connections
Connection of Brace of Gusset Plate
Check of Gusset Plate Capacity
Out-of- Plane Buckling Of Brace : Gusset Rotation Demands
One Story Building With Steel Roof Trusses
Floor Plan
Elevation Of Wall Line 6
High Roof Framing (At Bottom Chord Of Roof Trusses)
Preliminary Determinations (from Table 2-1)
Preliminary Structural Assessment (from Table 4-1) - ufc_3_301_05a0280
Condition Of Foundations - ufc_3_301_05a0281
Final Assessment (From Table 6-1)
Evaluation Report ( From Table 6-2) - ufc_3_301_05a0283
Seismic Rehabilitation Design ( Chapter7)
Typical Section Through Rehabiltated Footing
Analysis Of Structure Using the Linear Static Procedure (LSP) - ufc_3_301_05a0286
Determine Building Period
Determine Weight Tributary to the Diaphragm in Each Direction
Determine Shear Deflection
Determine Wall Deflections from Tributary Loads
Panel 2 Shear Wall Line B.
Transverse Walls
Transverse Walls - Continued
Longitudinal Walls
Longitudinal Walls - Continued
Longitudinal Walls - Continued - ufc_3_301_05a0296
Longitudinal Walls - Continued - ufc_3_301_05a0297
Determine Seismic Effects On building Components , Q
Shear Wall forces :
Shear Wall forces - Continued
Longitudinal Direction
Out-Of-Plane Wall Forces - ufc_3_301_05a0302
Conbination of Load Effects
Deformation- Controlled Actions - ufc_3_301_05a0304
Moment Strength Of Wall Piers
Moment Strength Of Wall Piers - Continued
Force-Controlled Actions
Diaphragm Shear
Connections of Diaphragm To Shear Walls for In-Plane Shear Transfer
Connection Of Diaphragm to Shear Walls for out- of Plane Bracing
Shear in Existing Concrete Strip Footings
Prepare Construction Documents - ufc_3_301_05a0312
Infilled Concrete Moment Frame Building
Roof Framing - ufc_3_301_05a0315
Longitudinal Elevation
Image 1
Image 2
Plan View Of Column Footing
Prelimimary Determinations ( Following Steps Laid out in table 2-1 )
Geologic Site Hazards and Foundations Checklist
Capacity of Foundations
Structural Evaluation ( Tier 2) (Following steps laid Out in table 5-1)
Determine the Component Forces And Displacements Using Linear, Elastic Analysis Methods.
Compression Strut Term Definitions
The Botton Portion of the Wall Below The Mezzanine Contains Openings
Determine flexural- Shear Stiffness Of Top Portion Of Wall
Typical Longitudinal Infill Panel
Longitudinal Seismic Forces - ufc_3_301_05a0329
Acceptance Criteria - ufc_3_301_05a0330
Typical Longitudinal Infill Panel Forces
Transverse Wall Line C Below Mezzanine
Transverse Wall Line D Below Mezzanine
Column Flexure
P-M Interaction Diagram for Columns
Transverse Beam
Beams At Mezzanine Level
Longitudinal Beams
Shear in Column Weak Direction
Beam Shear - ufc_3_301_05a0340
Estimating Forces Applied to Beams
Transverse Beams
Transverse Beams Along Grid Lines A.B, And C At Roof Level
Final Assessment ( From table 6-1) - ufc_3_301_05a0344
Evaluation Report ( From table 6-2) - ufc_3_301_05a0345
Seismic Rehabilittion Design (Chapter 7)
Rehabilitated Wall Section Through Wall Line 2 At Mezzanine
Rehabilitated Wall Section zthrough Wall Lines c and D At Mezzanine
Typical Shotcrete Reinforcement for Longitudinal Infill Panel
New Buttress Wall Details
Elevation of Wall Line A Showinh New Buttresses At Door opening
Confirming Evaluation Of Rehabilitation - ufc_3_301_05a0352
The Foundation Is Assumed To Be Rigid And Is Not Included in the Mathematical Model
Vertical Distribution Of Seismic Forces
Seismic forces in the Longitudinal Direction
Deformation-Controlled Components
Transvese Wall Line D Above Mezzanine
Typical Buttress
P-m for Typical Longitudinal Wall Element
Typical Longitudinal Wall Segment
Wall Line D, Panel Above Mezzanine Level
P-m for End Wall Pier Element
P-M for New Buttress Walls
Beam Flexural Forces
Column Flexural Forces
Beam Shear forces:
Deformation-Controlled Components
Typical Longitudinal Walls
Typical Longitudinal Walls - Continued - ufc_3_301_05a0369
Typical Longitudinal Walls - Continued - ufc_3_301_05a0370
Force-Controlled Components
Prepare Construction Documents - ufc_3_301_05a0372
One - Story Steel Frame Building
Figure D5-2: Roof Framing Plan
Figure D5-4: Typical Moment Connection
Preliminary Determinations ( from Table 2-1) - ufc_3_301_05a0376
Preliminary Structural Assessment (From Table 4-1) - ufc_3_301_05a0377
Final Assessment (fromTable 6-1)
Figure D5-5: Proposed Rehabilitation Schemes
Figure D5-6: Connection Details for X- Braced Frames
Figure D5-7: Brace Connection Details For Moment Frames
Evaluation Report (from Table 6-2)
Rehabilitation ( from Table 7-1) - ufc_3_301_05a0383
Analysis of Structure Using Linear Static Procedure ( LSP)
Determine Building Seismic Weight:
Mathematical Modeling Assumptions
Design of Diagonal Braces in X- Braced Frames:
Design of Diagonal Braces in X- Braced Frames - Continued
Connections
Figure D5-8: Top Connection for X -Braced Frames
Design of Braces in Chevron- Braced Frames
Column Capacity Check
Check Column Anchorage to Footing
Check Beams At Chevron- Braced Frames Of Additional Unbalanced Moment
Check Beams At Chevron- Braced Frames Of Additional Unbalanced Moment - Continued
Figure D5-10: Roof Framing Plan - Lateral Bracing Of Beams
Figure D5-11: Detail Of Lateral Bracing of Beams At Brace Intersections
Diaphragm Shear Capacity Check
Diaphragm Chord Forces
Appendix E. Architectural Component Examples
Design Example Problem E1: Retrofit Of Unreinforced Masonry Parapet
Preliminary Nonstructural Assessment - ufc_3_301_05a0404
Evalution Report
Figure E1-2: Parapet Bracing
Determine Seismic Forces
Figure E1-3 : Detail At top of Parapet Brace
Design of Channel Brace
Design Channel Strongback for 2x4 Purlin to Carry The brace Load
Design Channel Strongback for 2x4 Purlin to Carry The brace Load - Continued
Figure E1-7: Detail at Bottom Of Parapet Bracing
Design Condition Where Parapet Brace Is Parallel to 4x12 Rafter
Figure E-10: Detail Parapet Brace At 4x12 Rafter
Design Example Problem E-2: Evaluation And Retrofit of Canopy Building Entrance
Preliminary Nonstructural Assessment - ufc_3_301_05a0416
Figure E-2-2: Section A of Canopy
Evaluation Report
Figure E2-3: Canopy Bracing
Rehabilitation Design - ufc_3_301_05a0420
Design Connection to Concrete Wall.
Figure E-2-4: Detail A - Connection To Wall
Design Example Problem e3. Bracing of Library Shelving
Preliminary Nonstructural Assessment - ufc_3_301_05a0424
Nonstructural Evaluation
Rehabilitation Design
Design Connection to Slab
Appendix F. Mechanical And Electrical Component Examples
Design Example Problem F1: Electrical Conrtol Panel
Preliminary Nonstructural Assessment - ufc_3_301_05a0432
Nonstructural Evaluation (Tier 2)
Evaluation Report - ufc_3_301_05a0434
Check Bolt Capacity
Design Example Problem F-2: Emergency Motor Generator
Preliminary Nonstructural Assessment - ufc_3_301_05a0438
Rehabilitation Design - ufc_3_301_05a0439
Rehabilitation Design - Continued
Mitigation
Figure F2-2. Seismic Restraint for Nibration Isolated Equipment
Design Example Problem F-3: Suspended Chiller Unit
Preliminary Nonstructural Assessment - ufc_3_301_05a0444
Evaluation Report - ufc_3_301_05a0445
Figure F3-2. Bracing of Suspended Chiller Unit
Design Connection to Slab
Appendix H. Checklists for Unreinforced Masonry Bearing- Wall Buildings
Building System
Lateral- force - Resisting System
Supplemental Structural Checklist for Building Type URM. Unreinforced Masorny Bearing - Wall Buildings With Flexible Diaphragms
Basic Structural Checklist for Building Type URMA: Unreinforced Masorny Bearing Wall Buildings with Stiff Diaphragms
Connections - ufc_3_301_05a0459
Supplemental Structural Checklist for Building Type URMA: Unreinforced Masonry Bearing -Wall Buildings With Stiff Diaphragms
Chapter 1. Introduction - ufc_3_301_05a0013
Basis for Evaluation And Rehabilitation
Existing Buildings
Figure 1-1. Flow Chart for Structural And Nonstructural Evaluation
Background - ufc_3_301_05a0017
Ther Military Risk Reduction Program
Chapter 2. Building Data Acquisition And Classification
Table 2-1. Preliminary Determinations for Structural And Nonstructural Evaluations
Table 2-2. Seismic Use Groups
Table 2-2. Seismic Use Groups - Continued
Table 2-3. Structural Performance Levels
Table 2-4. Performance Objectives
Figure 2-1. Performance And Structural Deformation Demand for Ductile Structures
Figure 2-2. Performance and Structural Deformation Demand for Nonductile Structures
Table 2-5a. Seismic Design Category Based On 1-Second Response Acceleations
Chapter 3. Geological Hazards Evaluation
Chapter 4. Tier 1 Evaluation ( Screening)
Table 4-1. Preliminary Assessment for Structural Evaluations
Table 4-2. Structural Screening ( Tier1)
Tier 1 Structural Checklists
Preliminary Assessment.
Table 4-4. Preliminary Nonstructural Assessment
Table 4-5. Nonstructural Screening (Tier1)
Chapter 5. Tier 2 And Tier 3 Evaluations
Structural System Evaluations
Table 5-1. Structural Evaluation (Tier2)
Acceptance Criteria - ufc_3_301_05a0042
Tier 3 Procedures
Nonstructural Systems Evaluation
Chapter 6. Final Assessment And Report
Table 6-1. Final Assessment
Final Nonstructural Assessment
Evaluation Report - ufc_3_301_05a0048
Table 6-2. Evaluation Report
Appendices to the Evaluation Report Shall Include
Chapter 7. Rehabilitation of Structural Systems
Table 7-1. Rehabilitation Procedures
Figure 7-1. Rehabilitation Procedures
Supplementary Analysis.
Analytical Procedures.
Linear Procedures
Nonlinear Procedure.
Figure 7-2. Idealized Component Load Versus Deformation Curves for Depicting Component Modeling And Acceptability
Preparation of Contract Documents
Chapter 8. Rehabilitation Techniques for Structural Systems
Rehabilitation Techniques For Structural Components
Table 8-1. Strengthening Options for Reinforced Concrete Or Masorny Shear Wall Buildings
Table 8-1. Strengthening Options for Reinforced Concrete Or Masorny Shear Wall Buildings - Continued
Strengthening Techniques For Shear Capacity
Figure 8-1. Carbon Fiber Overlay to Enhance Shear Capacity of Masonry Wall
Figure 8-2. Strengthening of An Unreinforced Masonry Wall
Strengthening Techniques For Coupling Beams
Figure 8-3. Carbon Fiber Overlay to Enhance Flexural Capacity of Masonry Wall
Precast Concrete Shear Walls
Strengthening Techniques For Inadequate Interpanel Capacity
Unreinforced Masonry Shear Walls
Table 8-2. Strengthening Options for Unreinforced Concrete for Masorny Buildings
Table 8-2. Strengthening Options for Unreinforced Concrete for Masorny Buildings - Continued
Strengthening Techniques For Inadequate In-Plane Shear and Out-of-Plane Flexural Capacity
Redistribution.
Moment Frames
Table 8-3. Strengthening Options for Steel Moment -Resisting Frame Buildings
Table 8-3. Strengthening Options for Steel Moment -Resisting Frame Buildings - Continued - ufc_3_301_05a0079
Table 8-3. Strengthening Options for Steel Moment -Resisting Frame Buildings - Continued - ufc_3_301_05a0080
Strengthening Techniques For Inadequate Beam/Column Joints
Strengthening Techniques For Inadequate Panel Zone Capacity
Figure 8-4. Rehabilitation of A Welded Moment Connection
Figure 8-5. Rehabilitation of A Bolted Moment Connection
Figure 8-6. Strenthening a Pre-Northridge Moment Connection
Techniques For Reducing Drift
Concrete Moment Frames. - ufc_3_301_05a0087
Table 8-4. Strengthening Options for Reinforced Concrete Frame Buildings
Table 8-4. Strengthening Options for Reinforced Concrete Frame Buildings - Continued
Figure 8-7. FRP Overlay to Enhance the Shear And Flexural Capacity Concrete Beams
Strenghtening Techniques for Inadedquate Joint Shear Capacity.
Precast Concrete Moment Frames
Deficiencies
StrengtheiningTechniques for Other Deficiencies
Figure 8-8. Strengthening A Beam Shear Connection
The Principal Deficiencies Of Steel Concentrically Braced Frames Are
Figure 8-9. Strengthening of A Column Splice
Table 8-5. Strengthening Options for Steel- Braced-Frame Buildings
Table 8-5. Strengthening Options for Steel- Braced-Frame Buildings - Continued
Strengthening Techniques for Inadequate Brace Capacity
Figure 8-10. Strengthening of Single-Angle Bracing
Figure 8-11. Strengthening an Existing Brace With Secondary Bracing
Strengthening Techniques for Inadequate Axial Load Capacity
Deficiencies
Concrete Diaphragms. - ufc_3_301_05a0105
Strengthening Tecniques for Inadequate Flexural Capacity.
Strengthening Techniques for Inadequate Shear Or Tensile Capacity At Openings
Poured Gypsum Diaphragms
Strengthening Techniques for Inadequate Chord or Collector Capacity
Steel Deck Diaphragms
New Horizontal Bracing.
Figure 8-12. Providing Shear Transfer for Steel Decking on Steel Joists At Exterior Wall.
Additional Shear Walls Or Vertical Bracing.
Figure 8-13. Modifying Simple Beam Connection to Provide Chord Tension Capacity.
Timber Diaphragms.
Strengthening Techniques for Inadequate Chord Capacity.
Figure 8-14. Strengthening Of a Timber Diaphragm
Figure 8-15. Chord Splice For Wood Diaphragm
Figure 8-16. Providing New Chords for Wood Diaphragms
Strengthening Techniques for Excessive Shear Stresses
Horizontal Steel Bracing
Foundations.
Strengthening Techniques For Excessive Uplift Conditions
Individual Pier Column Footings.
Strengthening Techniques for Execessive Uplift Conditions
Figure 8-17. Strengthening An Existing Spread Footing
Piles or Drilled Piers.
Mat Foundations
Rehabilitation Techniques for Connections
Connections of Poured Gypsum Diaphragms.
Connections Of Precast Concrete Diaphragms.
Connections of Steel Deck Diaphgrams Without Concrete Fill.
Connections Of Steel Deck Diaphragms with Concrete Fill.
Figure 8-18. Strengthening Steel Decking Support for Shear Transfer And Wall Anchorage
Connections Of Horizontal Steel Bracing.
Connections In Timber Diaphragms.
Strengthening Techniques for In-Plane Shear Transfer Capacity to Exterior Walls
Strengthening Techniques for Inadeguate Out-of-Plane Anchorage
Foundation Connections.
Connections Of Braced Frames.
Figure 8-19. Steel Plate Anchorage For Precast Concrete Wall Panels
Connection of Steel Moment Frames
Figures 8-20. Strengthening of A Column Base Plate in A Braced Frame
Rehabilitation With Protective Systems
Energy Dissipation
Chapter 9. Rehabilitation Strategies And Tecniques For NonStructural Systems
Rehabilitation Criteria for Nonstructural Components
Exterior Curtain Walls.
Partitions
Rehabilitation Of Nonstructural Mechanical And Electrical Components
Ductwork and Piping
Emergency Power Systems.
Hazardous Materials Storage Systems.
Equipment that is Vibration Sensitive
Chapter 10. Quality Assurance/Quality Control
Evaluation
Construction - ufc_3_301_05a0159
Appendix B. Symbols And Notations - ufc_3_301_05a0163
Appendix B. Symbols And Notations - Continued - ufc_3_301_05a0164
Appendix C. Glossary - ufc_3_301_05a0165
Appendix C. Glossary - Continued - ufc_3_301_05a0166
Appendix C. Glossary - Continued - ufc_3_301_05a0167
Appendix C. Glossary - Continued - ufc_3_301_05a0168
Appendix C. Glossary - Continued - ufc_3_301_05a0169
Appendix C. Glossary - Continued - ufc_3_301_05a0170
Appendix C. Glossary - Continued - ufc_3_301_05a0171
Appendix C. Glossary - Continued - ufc_3_301_05a0172
Appendix C. Glossary - Continued - ufc_3_301_05a0173
Appendix C. Glossary - Continued - ufc_3_301_05a0174
Appendix C. Glossary - Continued - ufc_3_301_05a0175
Appendix D. Structural Example Problems
D1 Three- Strory Barracks Building
Longitudinal Building Elevation
Framing Roof Level
Foundation Plan
Section 1 Through Footing
Column and Beam Cross Sections
Preliminary Determinations ( FromTable 2-1)
Preliminary Structural Assessment ( From Table 4-1)
Condition Of Foundations - ufc_3_301_05a0187
Basic Structural Checklist for Building Type C1: Concrete Moment Frames
Lateral- force Resisting System
Supplemental Structural Checklist For building Type C1: Concrete Moment Frames
Diaphragms
Connections - ufc_3_301_05a0192
Basic Structural Checklist For Building Type C2: Concrete Shear Wall Buildings with Stiff Diaphragms
Lateral force- Resisting System
Supplemental Structural Checklist For Building Type C2
Connections - ufc_3_301_05a0196
Determine Building Seismic Weight.
Determine Mapped Spectral Acceleration ( Per FEMA 310 Section 3.5.2.3.1)
Axial Stress Due to Overturning ( Per FEMA 310 Section 3.5.3.6):
Interior Perimeter Columns
Exterior Perimeter Columns
Strong Column/Weak Beam
Deflection Compatibility
Transverse Direction: Reinforced Concrete Shear Walls
Reinforcing Steel
Structural Evaluation
Determine the Building And Component Forces And Displacements - ufc_3_301_05a0207
Analysis Results
Deformation- Controlled Actions - ufc_3_301_05a0209
Force- Controlled Actions
Nominal Shear Capacity
Joint Shear Forces
Acceptance Criteria - ufc_3_301_05a0213
Acceptance Criteria - Continued - ufc_3_301_05a0214
Force- Controlled Actions.
Structural Evaluation ( Tier 3) from Table 5-2
Final Assessment ( From Table 6-1) - ufc_3_301_05a0217
Nonstructural Evaluation Assessment.
Building Rehabilitation Concept
Evaluation Report (from table 6-2)
Seismic Rehabilitaion Design (Chapter 7)
Analysis Of Structure Using The Linear Static Procedure (LSP) - ufc_3_301_05a0222
Mathematical Modeling Assumptions ( Per FEMA 273 Section 3.2.2):
Component Gravity Loads
Check of Deformation - Controlled Components
Typical Wall Cross- Section
The Flexural Strenght of the Wall is Determined Using The Program BIAX
Development Length Of Longitudinal Reinforcing Steel At The Base of The Wall Per ACI 318 Chapter 21
Check Of Column Members
Check Of Force - Controlled Components
Shear Forces In New Wall Segments
Typical Shear Wall Elevation
Column Shear
Beam Shear - ufc_3_301_05a0234
Joint Shear
Lenght Along Wall (ft)
Cross Section Of New Extended Footing
Check Soil Capacity
Shear Strenght of Transverse Walls
Prepare Construction Documents
Two- Story Steel Moment Frame Building
Roof Framing - ufc_3_301_05a0242
Second Floor Framing
Column Footing Elevation And Plan View
Typical Section At Exterior Wall
Preliminary Determinations ( from Table 2-1) - ufc_3_301_05a0246
Preliminary Structural Assessment ( from Table -4-1)
Determine the Pseudo Lateral Forces in Accordance with FEMA 310 sec 4.2.2.1.1
Determine The building And Component Forces And Displacements - ufc_3_301_05a0249
Acceptance Criteria - ufc_3_301_05a0250
Acceptance Criteria - Continued - ufc_3_301_05a0251
Force-Controlled Actions
Steel Beam - Column Connections
Steel Beam - Column Connections - Continued
Evaluation Results
Final Assessment ( from Table 6-1) - ufc_3_301_05a0256
Rehabilitation ( from Table 7-1) - ufc_3_301_05a0257
Brace And Gusset Details At Column Base
Confirming Evaluation Of Rehabilitation - ufc_3_301_05a0259
Pushover Analysis
Brace Axial Hinges
Brace Axial Hinges - Continued
Bottom Brace Axial Model
Beam Hinges
Column Hinges
Conduct Pushover Analysis Of Structure
Determine Target Displacement
Determine Actions and Deformations
Deformation-Controlled Actions
Deformation-Controlled Actions - Continued
Check of Gusset Plates and Bracing Connections
Connection of Brace of Gusset Plate
Check of Gusset Plate Capacity
Out-of- Plane Buckling Of Brace : Gusset Rotation Demands
One Story Building With Steel Roof Trusses
Floor Plan
Elevation Of Wall Line 6
High Roof Framing (At Bottom Chord Of Roof Trusses)
Preliminary Determinations (from Table 2-1)
Preliminary Structural Assessment (from Table 4-1) - ufc_3_301_05a0280
Condition Of Foundations - ufc_3_301_05a0281
Final Assessment (From Table 6-1)
Evaluation Report ( From Table 6-2) - ufc_3_301_05a0283
Seismic Rehabilitation Design ( Chapter7)
Typical Section Through Rehabiltated Footing
Analysis Of Structure Using the Linear Static Procedure (LSP) - ufc_3_301_05a0286
Determine Building Period
Determine Weight Tributary to the Diaphragm in Each Direction
Determine Shear Deflection
Determine Wall Deflections from Tributary Loads
Panel 2 Shear Wall Line B.
Transverse Walls
Transverse Walls - Continued
Longitudinal Walls
Longitudinal Walls - Continued
Longitudinal Walls - Continued - ufc_3_301_05a0296
Longitudinal Walls - Continued - ufc_3_301_05a0297
Determine Seismic Effects On building Components , Q
Shear Wall forces :
Shear Wall forces - Continued
Longitudinal Direction
Out-Of-Plane Wall Forces - ufc_3_301_05a0302
Conbination of Load Effects
Deformation- Controlled Actions - ufc_3_301_05a0304
Moment Strength Of Wall Piers
Moment Strength Of Wall Piers - Continued
Force-Controlled Actions
Diaphragm Shear
Connections of Diaphragm To Shear Walls for In-Plane Shear Transfer
Connection Of Diaphragm to Shear Walls for out- of Plane Bracing
Shear in Existing Concrete Strip Footings
Prepare Construction Documents - ufc_3_301_05a0312
Infilled Concrete Moment Frame Building
Roof Framing - ufc_3_301_05a0315
Longitudinal Elevation
Image 1
Image 2
Plan View Of Column Footing
Prelimimary Determinations ( Following Steps Laid out in table 2-1 )
Geologic Site Hazards and Foundations Checklist
Capacity of Foundations
Structural Evaluation ( Tier 2) (Following steps laid Out in table 5-1)
Determine the Component Forces And Displacements Using Linear, Elastic Analysis Methods.
Compression Strut Term Definitions
The Botton Portion of the Wall Below The Mezzanine Contains Openings
Determine flexural- Shear Stiffness Of Top Portion Of Wall
Typical Longitudinal Infill Panel
Longitudinal Seismic Forces - ufc_3_301_05a0329
Acceptance Criteria - ufc_3_301_05a0330
Typical Longitudinal Infill Panel Forces
Transverse Wall Line C Below Mezzanine
Transverse Wall Line D Below Mezzanine
Column Flexure
P-M Interaction Diagram for Columns
Transverse Beam
Beams At Mezzanine Level
Longitudinal Beams
Shear in Column Weak Direction
Beam Shear - ufc_3_301_05a0340
Estimating Forces Applied to Beams
Transverse Beams
Transverse Beams Along Grid Lines A.B, And C At Roof Level
Final Assessment ( From table 6-1) - ufc_3_301_05a0344
Evaluation Report ( From table 6-2) - ufc_3_301_05a0345
Seismic Rehabilittion Design (Chapter 7)
Rehabilitated Wall Section Through Wall Line 2 At Mezzanine
Rehabilitated Wall Section zthrough Wall Lines c and D At Mezzanine
Typical Shotcrete Reinforcement for Longitudinal Infill Panel
New Buttress Wall Details
Elevation of Wall Line A Showinh New Buttresses At Door opening
Confirming Evaluation Of Rehabilitation - ufc_3_301_05a0352
The Foundation Is Assumed To Be Rigid And Is Not Included in the Mathematical Model
Vertical Distribution Of Seismic Forces
Seismic forces in the Longitudinal Direction
Deformation-Controlled Components
Transvese Wall Line D Above Mezzanine
Typical Buttress
P-m for Typical Longitudinal Wall Element
Typical Longitudinal Wall Segment
Wall Line D, Panel Above Mezzanine Level
P-m for End Wall Pier Element
P-M for New Buttress Walls
Beam Flexural Forces
Column Flexural Forces
Beam Shear forces:
Deformation-Controlled Components
Typical Longitudinal Walls
Typical Longitudinal Walls - Continued - ufc_3_301_05a0369
Typical Longitudinal Walls - Continued - ufc_3_301_05a0370
Force-Controlled Components
Prepare Construction Documents - ufc_3_301_05a0372
One - Story Steel Frame Building
Figure D5-2: Roof Framing Plan
Figure D5-4: Typical Moment Connection
Preliminary Determinations ( from Table 2-1) - ufc_3_301_05a0376
Preliminary Structural Assessment (From Table 4-1) - ufc_3_301_05a0377
Final Assessment (fromTable 6-1)
Figure D5-5: Proposed Rehabilitation Schemes
Figure D5-6: Connection Details for X- Braced Frames
Figure D5-7: Brace Connection Details For Moment Frames
Evaluation Report (from Table 6-2)
Rehabilitation ( from Table 7-1) - ufc_3_301_05a0383
Analysis of Structure Using Linear Static Procedure ( LSP)
Determine Building Seismic Weight:
Mathematical Modeling Assumptions
Design of Diagonal Braces in X- Braced Frames:
Design of Diagonal Braces in X- Braced Frames - Continued
Connections
Figure D5-8: Top Connection for X -Braced Frames
Design of Braces in Chevron- Braced Frames
Column Capacity Check
Check Column Anchorage to Footing
Check Beams At Chevron- Braced Frames Of Additional Unbalanced Moment
Check Beams At Chevron- Braced Frames Of Additional Unbalanced Moment - Continued
Figure D5-10: Roof Framing Plan - Lateral Bracing Of Beams
Figure D5-11: Detail Of Lateral Bracing of Beams At Brace Intersections
Diaphragm Shear Capacity Check
Diaphragm Chord Forces
Appendix E. Architectural Component Examples
Design Example Problem E1: Retrofit Of Unreinforced Masonry Parapet
Preliminary Nonstructural Assessment - ufc_3_301_05a0404
Evalution Report
Figure E1-2: Parapet Bracing
Determine Seismic Forces
Figure E1-3 : Detail At top of Parapet Brace
Design of Channel Brace
Design Channel Strongback for 2x4 Purlin to Carry The brace Load
Design Channel Strongback for 2x4 Purlin to Carry The brace Load - Continued
Figure E1-7: Detail at Bottom Of Parapet Bracing
Design Condition Where Parapet Brace Is Parallel to 4x12 Rafter
Figure E-10: Detail Parapet Brace At 4x12 Rafter
Design Example Problem E-2: Evaluation And Retrofit of Canopy Building Entrance
Preliminary Nonstructural Assessment - ufc_3_301_05a0416
Figure E-2-2: Section A of Canopy
Evaluation Report
Figure E2-3: Canopy Bracing
Rehabilitation Design - ufc_3_301_05a0420
Design Connection to Concrete Wall.
Figure E-2-4: Detail A - Connection To Wall
Design Example Problem e3. Bracing of Library Shelving
Preliminary Nonstructural Assessment - ufc_3_301_05a0424
Nonstructural Evaluation
Rehabilitation Design
Design Connection to Slab
Appendix F. Mechanical And Electrical Component Examples
Design Example Problem F1: Electrical Conrtol Panel
Preliminary Nonstructural Assessment - ufc_3_301_05a0432
Nonstructural Evaluation (Tier 2)
Evaluation Report - ufc_3_301_05a0434
Check Bolt Capacity
Design Example Problem F-2: Emergency Motor Generator
Preliminary Nonstructural Assessment - ufc_3_301_05a0438
Rehabilitation Design - ufc_3_301_05a0439
Rehabilitation Design - Continued
Mitigation
Figure F2-2. Seismic Restraint for Nibration Isolated Equipment
Design Example Problem F-3: Suspended Chiller Unit
Preliminary Nonstructural Assessment - ufc_3_301_05a0444
Evaluation Report - ufc_3_301_05a0445
Figure F3-2. Bracing of Suspended Chiller Unit
Design Connection to Slab
Appendix H. Checklists for Unreinforced Masonry Bearing- Wall Buildings
Building System
Lateral- force - Resisting System
Supplemental Structural Checklist for Building Type URM. Unreinforced Masorny Bearing - Wall Buildings With Flexible Diaphragms
Basic Structural Checklist for Building Type URMA: Unreinforced Masorny Bearing Wall Buildings with Stiff Diaphragms
Connections - ufc_3_301_05a0459
Supplemental Structural Checklist for Building Type URMA: Unreinforced Masonry Bearing -Wall Buildings With Stiff Diaphragms
