型钢混凝土复合受扭构件的恢复力模型研究  

Study on restoring-force model of steel reinforced concrete members subjected to combined torsion

作　　者：徐佩登 邵永健[1] 陈杰[1] 

机构地区：[1]苏州科技学院土木工程学院,江苏苏州215009

出　　处：《世界地震工程》2016年第2期176-182,共7页World Earthquake Engineering

基　　金：国家自然基金项目(51078249)

摘　　要：为建立型钢混凝土复合受扭构件的恢复力模型,进行了6个1/2比例的型钢混凝土柱在低周反复荷载作用下的复合受扭试验。试验考虑了轴压比、混凝土强度、扭弯比、配钢率和配箍率对型钢混凝土柱复合受扭滞回特征的影响。通过对试验结果的回归分析及其理论分析,及扭矩-扭率骨架曲线特征点的计算公式,提出了反复加载下强度退化率和卸载刚度的确定方法。并建立了型钢混凝土复合受扭构件的扭矩-扭率恢复力模型,可供型钢混凝土复合受扭构件非线性地震反应分析和工程设计参考。In order to establish a restoring-force model of steel reinforced concrete members subjected to combined torsion, the combined torsion tests of 6 steel reinforced concrete （ SRC ） columns on the scale of one to two were conducted under low cyclic loading. The influences of axial compression ratio, concrete strength torsion-bending ratio, ratio of reinforcement and stirrup rate on combined torsional hysteretic characteristics of SRC columns are taken into consideration. Based on the regression analysis of the tests results and theoretical analysis, a formula for calcu- lating the characteristic points of skeleton curves and the expressions for strength degeneration rate under repeated loading and unloading stiffness were presented. And the torque-torsion restoring-force model of the steel reinforced concrete member subjected to combined torsion was established. The research results can be referred in nonlinear seismic response analysis of steel reinforced concrete members subjected to combined torsion and structure design.

关 键 词：型钢混凝土 复合受扭构件 骨架曲线 滞回规则 恢复力模型 

分 类 号：TU398.9[建筑科学—结构工程]