Research On The Seismic Performance And Performance Index Limits Of Low-Rise RC Shear Wall With Rectangular Section

With the development of seismic theory research,Performance-based seismic design method has become a hot topic in the field of seismic research.Shear wall are the very important component of resisting lateral force and their performance has a great correlation with the overall performance of the structure.Deformation value of shear wall is the performance index of ’’Performance design method based on component deformation”.It is generally believed that the deformation limit of low shear span ratio shear wall is smaller so it is lack of systematic study on the performance based design method of the shear wall.The results of the present study show that the shear wall with small shear span ratio has a certain ductility,and the possibility of the design based on deformation..In this paper,8 shear span ratio RC shear walls with shear span ratio of 0.8 and 1.2 are designed based on the code of China.The seismic behavior and performance index of low shear span ratio RC shear walls are studied based on low cycle reciprocating test.The main contents of this paper are as follows:(1)The hysteretic behavior of 8 RC shear walls,such as hysteretic curve,skeleton curve,ductility ratio,energy dissipation capacity and stiffness degradation,are analyzed;(2)Discussed the shear wall performance index selection and classification criterion;proposed a performance classification method based on deformation,the shear wall is divided into 7 properties;describe the performance status through qualitative macro failure phenomena of concrete;by defining the deformation,bearing capacity,can damage index and other aspects of the quantitative description of each performance state,and gives the damage index of different amount of performance range;(3)Compared the deformation characteristics,yield deformation capacity and ultimate deformation capacity of the shear wall with different failure modes;pointed out that the ductile shear failure and brittle shear failure should be distinguished;(4)The influence of different parameters on the performance index is studied;a multiple linear regression model is proposed to the performance indexes of shear walls;The shear control part of shear wall performance indexs are corrected and compared with ASCE41-13;the limit values of shear failure performance indexes are given.