Reinforced Concrete Frame - Shear Wall Structure Study

For the frame-wall structure system, the seismic story shear of frame will change along with stiff degenerating of wall. Therefore, in order to ensure the seismic reliability of structure, especially the performance of preventing collapse of structure under "rear earthquake", the greatest story shear of frame in design are supposed to search. To solve this problem, research on theory of multi-line to defend earthquake, selection of analysis methods and models, and parameters analyses were applied. Push-over analyses, with more and more application, were applied for frame-wall buildings. It can "push" structure conveniently to any position what we expect to know. Certainly the maximal seismic story shear of frame can be gained by Push-over analyses. A brief introduction and comment of the current research of push-over analysis were presented in this paper, and some problems in its application needed to be solved were put forward to as well. The five subsection model was used to simulate elements of frame, while multi- component- in- parallel model was used to simulate wall in this paper. The effects of structural walls on the elastic-plastic responses of frame-wall buildings were mainly investigated. The disciplinary conclusions were drawn by examining the responses of buildings with different stiff character coefficient, different number of stories and different story drift allowance. The number of stories contributes little to the distribution of internal forces; and the story drift is an important index to evaluate destruction of frame-wall structure, and a great deal of calculation implied that the ratio of story shear of frame to base shear arrive at maximum when the story drift factor is about 1/500; while the most important factor is stiff characteristic coefficient. The stiff degenerating of wall has more influence on structure with smaller stiff characteristic coefficient. The related item of the code was evaluated. And the modification coefficients were derived by a great deal of analyses, which take into account the carrying capacity and deformation demand. The coefficients accord with fundamental of aseismic design and embody the theory of multi-line to defend earthquake, so it has guidable meaning for engineering design.