Question

• Assume building is in the maximum regional seismic zone (i.e. use "regional maximum design value") • All masonry walls are 8 in CMU, unit weight= 125 pcf • Estimated loads as follows: o 10 psf for framing (estimated) o 5 psf for mechanical & electrical o 15 psf for plywood o Snow load of 30 psf • No storage, major equipment, or roof gardens Determine the base shear.

Answer 1

that will Base shear Base shear is the maximum lateral force occur due to seismic ground motion at base of a Structure. the V= (a)W RT where = Base shear ev= Seismic coefficient (soil type, zone) -base shear table 16-8 of UBL 97. - table 16-8 of CV a = seismic Importance factor R = Response modification factor T = Seismic Time period of structure We Dead load of structure a = 0.36 for gone 5 a = 1.20 for snow load R 6.5 for Light -frame (wood) walls Sheard with wood Structural Panels rated for Shear resistance. T: 028 See Chemerally) a T W= 125 + 10 + 5+15 = 155 pct (Given

V = 0.36 x 112 x 155 6.5x628 = 66,96 = 36.179 1182 36.79 . pct. v = 36.79 pcf