【摘要】 收集国内近年来关于型钢混凝土(SRC)柱低周循环加载下的84组试验数据,回归分析峰值位移和屈服位移之比、强化刚度、软化刚度与SRC柱构件主要设计参数(轴压比、配箍特征值、剪跨比、体积配箍率和混凝土强度)之间的关系,提出型钢混凝土柱骨架曲线特征点的计算方法。结果表明:峰值位移和屈服位移之比与体积配箍率、混凝土强度成正比,与轴压比、配箍特征值及剪跨比均成反比;强化刚度系数与配箍特征值、剪跨比成正比,与轴压比、体积配箍率及混凝土强度成反比;软化刚度系数与配箍特征值、剪跨比及混凝土强度成正比,与轴压比、体积配箍率成反比。该结果可为型钢混凝土组合结构的地震反应分析提供参考。更多还原

【Abstract】 The regressive analysis of the collection of 84-group domestic test data of SRC from cyclic loading experiments shows the relationship between the ratio of maximum displacement & yield displacement,strengthened stiffness,degenerated stiffness and the main design parameters of SRC column,such as axial compression ratio,stirrup characteristic value,shear span ratio,stirrup volumetric percentage and concrete strength,and proposes the calculation method for the characteristic points of SRC column skeleton curve.The study arrives at following conclusions:the ratio of maximum displacement & yield displacement is rising with the increase of stirrup volumetric percentage and concrete strength,and has an inverse relationship with axial compression ratio,stirrup characteristic value and shear span ratio;strengthened stiffness coefficient is in proportion to stirrup characteristic value and shear span ratio,while in inverse proportion to axial compression ratio,stirrup volumetric percentage and concrete strength;while degenerated stiffness coefficient has the positive relationship with stirrup characteristic value,shear span ratio and concrete strength,and has negative relationship with axial compression ratio and stirrup volumetric percentage,the results of which can provide reference for seismic response analysis of SRC composite structures.更多还原