Abstract: (11960 Views)
An approach was formulated for the nonlinear analysis of three-dimensional dynamic soil-structure interaction (SSI) of
asymmetric buildings in time domain in order to evaluate the seismic response behavior of torsionally coupled wall-type
buildings. The asymmetric building was idealized as a single-storey three-dimensional system resting on different soil
conditions. The soil beneath the superstructure was modeled as nonlinear solid element. As the stiffness of the reinforced
concrete flexural wall is a strength dependent parameter, a method for strength distribution among the lateral force resisting
elements was considered. The response of soil-structure interaction of the system under the lateral component of El Centro
1940 earthquake record was evaluated and the effect of base flexibility on the response behavior of the system was verified.
The results indicated that the base flexibility decreased the torsional response of asymmetric building so that this effect for soft
soil was maximum. On the other hand, the torsional effects can be minimized by using a strength distribution, when the centre of
both strength CV and rigidity CR is located on the opposite side of the centre of mass CM, and SSI has no effect on this
criterion.