| Abstrakt: |
In order to study the seismic performance of steel X-braced concrete shear wall, ABAQUS software is used to calculate and analyze the existing tests. Based on the good verification of hysteretic curve and skeleton curve, the parameter analysis of 17 specimens is carried out, and the influence of axial compression ratio, shear span ratio, section steel size and steel strength on the shear bearing capacity of the specimen is studied. The results show that under horizontal load, the longitudinal reinforcement first yields, and then the cross region of X-section steel yields; With the increase of axial compression ratio, the size of section steel, the strength of section steel and the decrease of shear span ratio, the shear bearing capacity of the specimen has been improved to varying degrees. The ductility coefficient is less than 3 when the axial compression ratio is greater than 0.2. When the shear span ratio is 2,the ductility is the best, and the influence of section steel on the ductility is less than 10%. Then, nearly 60 specimens with different axial compression ratio and shear span ratio were calculated, and the matching relationship between the limit value of axial compression ratio and shear span ratio was obtained. Finally, based on the existing codes, the calculation method of shear capacity of X-braced shear wall is proposed, and the error of the calculation result is less than 10%. [ABSTRACT FROM AUTHOR] |
