Effect of shear wall location in rigid frame on earthquake response of roof structre

The purpose of this study is to investigate the effect of the shear wall location in rigidframes on the dynamic behavior of a roof structure due to vertical and horizontal earthquake motions. Thestudy deals with a gabled long span beam supported by two story rigid frames with shear walls. Theearthquake response analysis is carried out to study the responses of the roof: vibration mode, naturalperiod, bending moment and horizontal shear force of the bearings. The study results in the followingconclusions: First, a large horizontal stiffness difference between the side frames is caused by the shearwall location, which results in a large vertical vibration of the roof and a large shear force at the sidebearings. Second, in this case, the seismic design method for ordinary buildings is not useful indetermining the distribution of the static equivalent loads for the seismic design of this kind of long spanstructures.