Seismic behavior of tall buildings using steel-concrete composite columns and shear walls

摘要

For the seismic design of tall building structures, the behavior under severe earthquakes should be carefully considered and the upper limit of inter-story deformations are often defined by the design codes. To improve the performance of structures under severe earthquakes, composite structural members, including steel reinforced column and steel plate reinforced shear wall, are often adopted. In the present work, the seismic behavior of tall buildings using steel-concrete composite columns and shear walls is investigated numerically. Fiber beam-column element models and multilayer shell models are adopted to establish the finite element model of structure, and the material nonlinearities are described by the plasticity and damage models. The accuracy of the developed models is verified by the experimental results of a single shear wall. Systematic numerical simulations are performed for the tall building structures subjected to different earthquakes. The comparative study indicates that the nonlinear redistribution of internal forces plays a very important role for the performance of tall buildings under severe earthquakes.