Repeat Prob. 3.11 except that the longitudinal direction is to be considered. Prob. 3.11 Given: The plan and section of the building in Fig. 3.A. Roof dead load D 10 psf, and the walls are -in.-thick...

Repeat Prob. 3.11 except that the longitudinal direction is to be considered.

Prob. 3.11

Given: The plan and section of the building in Fig. 3.A. Roof dead load D 10 psf, and the walls are -in.-thick concrete. The building has a bearing wall system, braced with special reinforced concrete shearwalls. The building location is Charleston, South Carolina, where the mapped short-period spectral acceleration SS is 1.50g, and the mapped one-second spectral acceleration S1 is 0.42g. Site Class D, Occupancy Category II should be assumed.

Fig. 3.A

Find: For the transverse direction: a. The seismic base shear coefficient and the seismic diaphragm force coefficient. b. The uniform force to the roof diaphragm in lb/ft. Draw the loading diagram. c. The total diaphragm shear and the unit diaphragm shear adjusted to an ASD level adjacent to the transverse walls. d. The total shear and the unit shear at the midheight of the transverse shearwalls using ASD and LRFD load combinations.