Seismic Performance Study Of SRC Special-shaped Column Frame With Shear Wall Structure

Compared with frame structures,shear wall has larger lateral stiffness,and can effectively reduce the lateral resist earthquake force.shear wall structure bears most of the shear,shear wall structure has become modern high-rise buildings in the widespread adoption of great stiffness lateral force resisting system.Steel reinforced concrete(SRC)special-shaped column is a new kind of structure system,the building has the significant advantages of high room rate and facilitating the furniture,but also greatly improved the reinforced concrete(RC)special-shaped column Structure in low bearing capacity,bad seismic performance,has a good prospect of engineering application.The SRC special-shaped columns frame and reinforced concrete shear walls are combined to form a new structure — SRC special-shaped column frame with shear wall structure which can have both good ductility of SRC special-shaped columns and larger lateral stiffness of shear walls advantage.Current research on the structure is still in the exploratory stage,this paper take SRC special-shaped columns framework shear wall as the research target.Firstly carry out Pushover analysis and numerical simulation on member level to study performance analysis hysteresis,then made the same specimen testing,and finally take the whole 20 stories structure as an object to conduct multi-modal Pushover analysis(MPA),as follows:(1)Describe the seismic behavior research trends of SRC special-shaped columns,RC frame structure shaped column frame shear wall structural system,the seismic behavior of shear wall structures were also discussed,and put forward some suggestions that may require further study.(2)Take shear wall with SRC special-shaped columns frame as research target,and establish a reinforced concrete shear wall in the same size,use finite element software Opensees to conduct Pushover analysis and hysteresis performance analysis to the two shear walls,focuses on two kinds of shear wall seismic performance,such as shear bearing capacity,displacement ductility coefficient,energy dissipation and stiffness degradation;carry out variable parameter analysis about shear wall with SRC special-shaped columns frame,the factor contains axis pressure ratio,concrete strength and steel yield strength influence mixed shear wall.(3)Produce the shear wall with SRC special-shaped columns frame specimen to study seismic behavior and failure mechanism deeply.Observe the crack development and destruction of the mixing shear wall through pushover analysis;study mixed shear wall displacement increasement,its carrying capacity and stiffness of the mixed shear wall;analyzing the ductility and displacement angle of mixed shear wall whether meet seismic design requirements.(4)Carry on numerical analysis to 20 stories SRC special-shaped column frame shear wall planar structure.With MPA method,based on the performance points corresponding to the story drift value tests that seismic performance meet the requirements,by altering the strength of the concrete to change the shear stiffness ratio,study the influence effects of stiffness ratio on the seismic performance of overall structures.