免模剪力墙恢复力模型试验研究  

Experimental study of restoring force model for non-template shear wall

作　　者：吴方伯[1] 欧阳靖[1] 周绪红[1] 张高波 WU Fangbo;OUYANG Jing;ZHOU Xuhong;ZHANG Gaobo(College of Civil Engineering, Hunan University, Changsha 410082, China)

机构地区：[1]湖南大学土木工程学院

出　　处：《地震工程与工程振动》2019年第2期9-17,共9页Earthquake Engineering and Engineering Dynamics

基　　金：国家重点研发计划(2016YFC0701308)~~

摘　　要：本文通过8片免模剪力墙与1片现浇剪力墙低周反复加载试验,研究了免模墙体的抗震性能,比较了裂缝开展规律和破坏特征上与现浇墙体的异同。试验结果表明:除保温侧外,免模墙体裂缝开展与现浇墙体类似,破坏时预制模与核心现浇混凝土在塑性铰区域压溃程度有明显差别,保温墙体两侧预制模压溃程度也不一致;根据试验现象,建立了考虑不同加载阶段预制侧模参与工作程度的四折线骨架曲线特征点的计算方法,根据屈服后实测的各级滞回曲线滑移与捏拢等形状特征,建立了考虑刚度退化、强度退化及滑移的滞回规则。计算结果表明:计算特征点与实测特征点较为接近,模拟滞回曲线能很好的反映实测滞回曲线的规律。本文提出的恢复力模型作为免模剪力墙进行弹塑性动力分析的依据是合理的。In this paper, the seismic performance of 8 non-template shear walls and cast-in-situ shear wall is studied through the low cycle loading test. Characteristics of cracks and failure are compared with 1 cast-in-situ shear wall. The test results show that except for the insulation side, the crack of non-template wall is similar to the cast-in-situ wall. The failure degree of precast parts and core concrete in plastic hinge region is obviously different when destroyed, the insulation side and non-insulation side is also different. According to test phenomenon. a method for calculating the characteristic points of four broken line skeleton curves is established which takes account of degree of participation of precast parts. The hysteretic rules which takes account of stiffness degradation, strength degradation and slip are established according to the shape characteristics of slip and pinch on cycles after yielding. The calculation results show that the calculated characteristic points are closer to the measured characteristic points, and the simulated hysteretic curves can well reflect measured hysteresis curves. The restoring force model proposed in this paper si reasonable for elastic-plastic dynamic analysis of non-template shear wall.

关 键 词：剪力墙 预制侧模 骨架曲线 刚度退化 恢复力模型 

分 类 号：TU312.1[建筑科学—结构工程] TU973.16