HDC加固震损框桁式复合墙体抗震性能试验及恢复力模型研究  

Experimental studies on seismic performance and restoring force model of seismic-damaged frame-truss composite wall strengthened with HDC

作　　者：寇佳亮[1,2] 张香草 徐炎 周恒[3] KOU Jialiang;ZHANG Xiangcao;XU Yan;ZHOU Heng(School of Civil Engineering&Architecture,Xi'an University of Technology,Xi'an 710048,China;State Key Laboratory of Eco-hydraulics in Northwest Arid Region,Xi'an University of Technology,Xi'an 710048,China;Northwest Engineering Corporation Limited,Power China,Xi'an 710065,China)

机构地区：[1]西安理工大学土木建筑工程学院,陕西西安710048 [2]西安理工大学省部共建西北旱区生态水利国家重点实验室,陕西西安710048 [3]中国电建集团西北勘测设计研究院有限公司,陕西西安710065

出　　处：《地震工程与工程振动》2022年第3期122-133,共12页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(52079109,51408487);陕西省自然科学基础研究项目(2020JM-454)。

摘　　要：高延性混凝土(HDC)具有较高的应变硬化性能和多裂缝开展的特性,利用HDC加固9个震损框桁式复合墙体,并通过低周反复荷载试验研究了轴压比、桁杆个数以及桁杆是否内置钢板对复合墙体滞回特性的影响。基于试验结果分析,给出了其刚度退化规律、加卸载刚度计算公式以及相应的滞回规则,并建立了HDC加固震损框桁式复合墙体三折线恢复力模型。最后将得到的计算曲线与试验曲线进行对比,两者大致相同。表明该三折线恢复力模型可以较好的反映框桁式复合墙体在低周反复荷载作用下的恢复力特性和受力特征,为工程震损结构的加固和框桁式复合墙结构设计提供一定的参考和依据。High ductile concrete(HDC)has high strain hardening performance and multi crack development characteristics.It is proposed to strengthen 9 seismic-damaged frame-truss composite walls with HDC,and the effects of axial compression ratio,the number of truss members and whether the truss are embedded with steel plates on the hysteretic characteristics of composite wall are studied by low cycle loading test.Based on the analysis of test results,the stiffness degradation law,loading and unloading stiffness calculation formula and corresponding hysteretic rules are given,and the three fold restoring force model of seismic-damage frame truss composite wall strengthened with HDC is established.Finally,the calculated curves and experimental curves are compared,and they are roughly the same.It is proved that the three-linear model can better reflect the restoring force properties and mechanical characteristics of frame-truss composite wall under low cycle loading,which provided a certain reference and basis for the repair and reinforcement of engineering seismic-damaged structures and the design of frame-truss composite wall structures.

关 键 词：高延性混凝土 震损框桁式复合墙体 低周反复荷载试验 抗震性能 恢复力模型 

分 类 号：TU375[建筑科学—结构工程]