高强混凝土剪力墙地震损伤模型分析  

Analyses of seismic damage model for high-strength concrete shear wall

作　　者：罗欣[1] 梁兴文[1] 邓明科[1] 

机构地区：[1]西安建筑科技大学结构工程与抗震教育部重点实验室,陕西西安710055

出　　处：《地震工程与工程振动》2012年第4期145-151,共7页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(51078305;50908187);陕西省自然科学青年基金项目(2009 JQ7013);西安建筑科技大学基础研究基金项目(JC0902)

摘　　要：在分析比较现有钢筋混凝土结构的地震损伤模型的基础上,根据高强混凝土剪力墙的滞回曲线特性及刚度退化规律,采用能量耗散系数和最大变位处的卸载刚度的退化为破坏参数,提出了适用于高强混凝土剪力墙构件的双参数地震损伤模型。依据已有的高强混凝土剪力墙构件试验研究结果,对损伤模型进行非线性回归分析,确定了相应的地震损伤模型参数,提出了高强混凝土剪力墙各性能水平的损伤指数以及相应于三水准抗震设防的损伤指数允许值。分析结果表明,按本文所提出的损伤模型计算得到的剪力墙构件最终破坏时对应的损伤指数,其平均值在合理范围内,标准差较小;损伤指数计算值对应的损伤程度基本符合试验结果,计算结果离散程度较低。By analyzing and comparing the existing earthquake damage model of reinforced concrete structure, and based on the hysteretic characteristic and the degradation rules of unloading stiffness of high-strength concrete shear wall, a two-parameter earthquak ness degeneration corresponding e damage model is presented by cumulative energy dissipation and unloading stiff- to the maximum deformation . Based on the experimental study of high-strength concrete shear walls, two modeling parameters are obtained by nonlinear regression analysis. The damage indexes are proposed for different performance levels of high-strength concrete shear wall, and the damage index allowance of three-level seismic design are suggested. The results show that according to the damage model proposed by this paper, the average value of damage index calculated for the shear wall finally destroyed is in the reasonable range, and the standard deviation is low. The degree of damage corresponding to the calculation of damage index is basi- cally consistent with the experimental results, and the discrete degree of calculation results is low.

关 键 词：高强混凝土 剪力墙 损伤模型 双参数 累积滞回耗能 

分 类 号：TU375[建筑科学—结构工程] P315.92[天文地球—地震学]