高强型钢高性能混凝土剪力墙抗震性能研究

Experimental study on seismic performance of high strength steel high performance concrete shear walls

设计了4片高强型钢高性能混凝土剪力墙试件,对其进行了低周反复加载试验。分析了试件在压、弯、剪共同作用下的破坏过程和破坏机理,讨论了含钢率、配箍特征值等参数对这种剪力墙的破坏形态、荷载-位移滞回曲线、骨架曲线、位移延性、刚度退化和耗能能力以及承载力的影响。研究结果表明,轴压比、配钢率、配箍率以及边缘约束区长度等对这种剪力墙的破坏形态、承载力、延性、滞回特性等均有影响,按《型钢混凝土组合结构技术规程》(JGJ 138—2001)中型钢混凝土剪力墙承载力计算公式所得结果与试验结果吻合较好。

Four specimens of high strength steel high performance concrete shear walls were devised.Through the cyclic loading test,the failure pattern and failure mechanism of the shear wall under the combined effect of axial force,bending moment,and shear force were researched.The influence of steel ratio and the stirrup characteristic value,etc.on its characteristics of the failure pattern,load-displacement hysteretic curve,skeleton curve,displacement ductility,stiffness degradation,energy dissipation and bearing capacity were analyzed.The experimental results show that the failure pattern,bearing capacity,ductility,hysteretic behavior of this kind of walls all are related to the axial load ratio,steel ratio,stirrup ratio and the length of boundary zone.According to the formula in Technical specification for reinforced concrete composite structures（JGJ 138—2001）,the calculation results agree well with experimental results.