Theoretical Analysis And Experimental Study On Seismic Behavior Of High Performance Concrete Shear Wall With Boundary Columns

According to performance-based seismic design theory,six specimens of high performance concrete shear wall with boundary columns and several high strength rings like a chain along boundary element in the potential plastic region were designed and the quasi-static tests were carried out.Seismic performance such as failure pattern, hysteretic property,displacement ductility,rigidity degeneration,energy dissipation and section strain etc were investigated.Through the analysis of tests,the mean value and distribution of the story drift ratio for three performance levels,namely serviceability, life-safety and collapse protection,are presented.The influence of the axial load ratio, the shear span ratio,the amount and range of confinement reinforcement on the ductility, the capacity of energy dissipation and failure pattern were analyzed.The study shows that the story drift ratio,which is close correlative with the damage levels of members, can be used as the performance indexes of the members.In addition,setting boundary columns,and the amount and range of the several rings along boundary element determined by the axial load ratio and displacement ductility demand were demonstrated to be valid,and the ductility level of the high performance concrete shear wall met the demands of design.On the basic research and analysis of high performance concrete shear wall with boundary columns,the mechanical model of it are set up by using the non-linear analysis program CANNY,simulating the repeated loading test process,theoretical results and the experimental results are contrasted mutually.Through theoretical analysis and calculations,the allowable axial load ratio of concrete shear wall with confined boundary elements is studied,it can be used for revising the design code;using the non-linear analysis program CANNY,based on the numerical simulation with high performance concrete shear wall with boundary columns,the allowable axial load ratio of it is analysed,providing a reference to the study and design work.