Elasto-Plastic Analysis Of Infilled Wall Frame Shear Wall Structures

Filled frame-shear wall is a widely used structural form, which have favorable economic and applicability. Due to the requirements of architectural functions, which need to cut up the framework part of structure with the infill panel or infill wall, and the other non-structural members. This infill wall will change the dynamic characteristics of the structural to a large extent, and will bring a few advantaged or disadvantaged effects to the seismic performance of the whole structure. The central effects are the anti-lateral stiffness of the structure will be increased, the natural cycle will be reduced, and the horizontal seismic force will be increased. Meanwhile, the distribution of structural seismic shear and the overall deformation of the structure have considerable differences from the un-filling wall structure. At present, many researches have been conducted by scholars at home and abroad, and some useful conclusions have been obtained. Generally, the research on the infill wall structure is in a preliminary stage. There are still a lot of research work should be done to further recognize and summarize the structural dynamic characteristics.The model of the reinforced concrete frame shear structure with brick infill wall has been built, and the nonlinear seismic response has been calculated by the IDARC soft wear in this paper. The effects of filled wall to the dynamic characteristics have been analyzed, and the overall functional seismic performance of the filled frame-shear wall structure has been discussed. Under the Push-over theoretical framework, four lateral force distribution patterns have been applied to frame-shear wall structure with different number shear wall to take Push-over analysis, and the effects of lateral force distribution patterns to the pushover curve have researched. Combined with the present code for seismic design of buildings, modified capacity-demand-diagram method has been used in the seismic properties assessment of the frame-shear wall structure. Specific practical steps and progress have been given by means of example demonstrate and compared with the dynamic time-history analysis. Considered the structural stiffness degradations, strength reductions, and pinch effects, the injury and energy characteristics of the frame-shear wall structure have been analyzed, the mechanism of the overall yield, and the plastic hinge region have been recognized based on the fatigue damage model.