Shear strength of upper portion of wall (10' (12"/' (8")(174psi) = 167k (743KN)> 3.02k (13.4KN), OK
)
)
Mupper = (3.02k)(14.92' = 45kft (61.0 KNm)
)
M/Vl = 45 / (3.02)(10) = 1.5 < 3.0 (no boundary zones required in upper wall portion)
Distribute shear to wall piers in lower portion of wall based on relative rigidities;
Router = 960 kip / in
Rmiddle = 4147 kip / in
(previously calculated)
Vouter = 23.7k (960)/(2 x 960 + 4147) = 3.75 kips (16.7 KN)
Vmiddle = 23.7k (4147)/(2 x 960 + 4147) = 16.2 kips (72.1 KN)
Shear strength of outer pier = (3.25' (12"/' (8")(174) = 54.2 k (241 KN) > 3.75 k (16.68 KN), OK
)
)
Shear strength of middle pier = (6.5' (12"/' (8")(174) = 109 k (485 KN) > 16.2 k (72.1 KN), OK
)
)
Mouter = (8' (3.75k)/2 = 15 kft (20.34 KNm)
)
M/Vl = 15 / (3.75)(3.25' = 1.23 < 3.0 (no boundary zones required in outer piers)
)
Mmiddle = (8' (16.2k)/2 = 65 kft (88.14 KNm)
)
M/Vl = 65 / (16.2)(6.5) = 0.62 < 3.0 (no boundary zones required in middle pier)
Check overall action of lower portion of wall;
Mbase = (3.02)(24.92) + (20.7)(10' = 282 kft (382 KNm)
)
M/Vl = 282 / (23.7)(19.67) = 0.61 <3.0 (no boundary zones required in lower portion of wall)
Shear wall line 8
Shear wall line 8 resists shear forces from the upper roof and the sacristies.
Vupper = 12.3k (54.7 KN)
Vsacristy = 8.62k (38.3 KN)
Torsion: From sacristies in longitudinal direction x 30% =2 x 1.53(0.30) = 0.92k (4.09 KN)
Total shear = 12.3 k + 8.6k + 0.92 = 21.82 k (97.1 KN)
H3-43
Previous Page
