Study On Seismic Behavior Of Substructure Of Composite Coupling Beam And Shear Wall Connected By Bolted End-plate

High-rise shear wall began to develop from the traditional single concrete material to the combination of various materials, which is the inevitable result of unceasing increased structure height, gradually complex building function and more and more strict requirements for seismic resistance. By far the most common way is to combine steel and concrete, it can make full use of the advantages of steel tensile strength and concrete compressive strength so that a better seismic performance will be achieved. This paper puts forward a new substructure type of composite coupling beam and shear wall, the steel plate concrete composite coupling beam and SRC wall are connected to a whole by the bolted end-plate. In order to study the seismic performance on substructure of composite coupling beam and shear wall connected by this way, this paper made the following three aspects:① Six specimens of substructure of composite coupling beam and shear wall connected by bolted end-plate were designed and produced considering the composite coupling beam steel ratio and the floor contribution as the main parameter. The composite coupling beam is controlled by shear in order to give full play to the shear yield energy consumption of steel.② Quasi static loading test was carried out on the specimens, the seismic performance on substructure of composite coupling beam and shear wall connected by bolted end-plate was studied according to the phenomenon and data of the experiment. The shear deformation of connection area and the strain change rule of shape steel and bars were analyzed, the transfer mechanism of specimens were explored.③ The experiments were simulated by adopting finite element analysis software DIANA, and the simulated hysteretic curves and skeleton curves were compared with those obtained in experiments.The results show that through reasonable design bolted end-plate connection can guarantee the composite coupling beam to give full play to the strength, deformation and energy dissipation capacity, effectively reduce damage of concrete in connection area. The larger the steel ratio of composite coupling beam is, the better deformation and energy dissipation capacity of specimen is, the slower the stiffness degradation rate is. For small span ratio composite coupling beam of shear mechanism design, slab can significantly improve the seismic performance of composite coupling beam so that it should be considered in the design. The hysteretic curves and skeleton curves simulated by finite element analysis software DIANA accord well with those obtained in experiments, the simulated results are more reasonable than experimental results for the specimen of HCCW-3.