STUDY ON EFFECT OF GROUND WALL THICKNESS ON SEISMIC PERFORMANCE OF FRAME-SUPPORTED SHEAR WALL STRUCTURES

In high-rise frame-supported shear wall structure，the lateral stiffness of structure nearby transfer storey is usually changed sharply，which easily causes stress concentration and is harmful to seismic performance． In order to improve the seismic performance of structure，parts of shear wall are usually linked with ground． The ground wall thickness has an important influence on seismic performance of structure． This paper is based on the engineering example about a commercial and residential building，calculates and analyses respectively the seismic response of different structure with different thickness，and focuses on the influence of different parameters on shear mutation between frame-supported wall and ground wall near conversion layers． The analysis results show that the change of shear wall thickness have an important influence on equivalent lateral stiffness of structure under transfer storey and a limited influence on the whole lateral stiffness，shear mutation to some extent can be abated．