节能砌块隐形密框复合墙体单面受火后恢复力模型  

Restoring force model of energy-saving block and invisible multi-ribbed frame composite wall after one-side fire

作　　者：江峰 李升才 林剑青 林文聪 郑建英 涂燕周 郑建生 Jiang Feng;Li Shengcai;Lin Jianqing;Lin Wencong;Zheng Jianying;Tu Yanzhou;Zheng Jiansheng(School of Civil Engineering,Minnan University of Science and Technology,Quanzhou 362700,China;School of Civil Engineering,Putian University,Putian 351100,China;Fujian Nanyu Engineering Construction Co.Ltd,Sanming 365000,China;Fujian Yujiang Construction Engineering Co.Ltd,Fuzhou 350001,China;Jinxi Holdings Group Co.Ltd,Fuzhou 350017,China;Fujian Zhongyong Construction Engineering Co.Ltd,Fuzhou 350005,China)

机构地区：[1]闽南理工学院土木工程学院,福建泉州362700 [2]莆田学院土木工程学院,福建莆田351100 [3]福建省南禹工程建设有限公司,福建三明365000 [4]福建省禹江建设工程有限公司,福建福州350001 [5]锦曦控股集团有限公司,福建福州350017 [6]福建省中永建设工程有限公司,福建福州350005

出　　处：《建筑科学》2025年第1期85-94,共10页Building Science

基　　金：福建省高校产学合作项目(2023Y4013);厦门市建设科技计划项目(XJK2022-1-16);闽南理工学院科技创新团队项目(23XTD115);福建省教育厅中青年教师教育科研项目(科技类)(JAT231146);福建省自然科学基金项目(2023J05195);莆田市自然科学基金项目(2023SZ3001PTXY11);莆田学院科研启动项目(2023137)。

摘　　要：对6个试件在ISO-834国际标准升温曲线下进行单面受火试验并对单面受火后的试件进行平面内循环往复加载试验,以评价其受火后滞回性能。对轴压比、受火时间对墙体的骨架曲线及滞回特性的影响进行了研究。通过研究试件骨架曲线的特征,得到了简化骨架曲线并确定了各阶段的刚度。根据试验结果和现有恢复力模型理论,提出了考虑轴压比和受火时间影响的适用于受火后墙体试件的退化四线型恢复力模型。通过对骨架曲线特征参数的计算和其与试验骨架曲线的对比,两者吻合较好。在此基础上提出滞回规则,计算得到的恢复力模型与墙体滞回曲线较为一致。结果表明所建议的恢复力模型可较好地反映轴压比和受火时间对其滞回特性的影响,可为火灾后墙体的结构弹塑性分析及修复加固提供参考。Six specimens are subjected to one-side fire test under the ISO-834 international standard heating curve and the in-plane cyclic loading test is carried out on the specimens after one-side fire to evaluate the hysteretic performance after fire.The effects of axial compression ratio and fire time on the skeleton curve and hysteresis characteristics of the wall are studied.By studying the characteristics of the skeleton curve of the specimen,the simplified skeleton curve is obtained,and the stiffness of each stage is determined.Based on the test results and the existing restoring force model theory,a degenerated four-line restoring force model suitable for post-fire wall specimens considering the influence of axial compression ratio and fire time is proposed.Through the calculation of the characteristic parameters of the skeleton curve and the comparison with the test skeleton curve,the two are in good agreement.On this basis,the corresponding hysteresis rules are proposed,and the calculated restoring force model is consistent with the hysteresis curve of the wall.The results show that the proposed restoring force model can well reflect the influence of axial compression ratio and fire time on its hysteretic characteristics,which can provide reference for the elastic-plastic analysis and repair and reinforcement of the wall structure after fire.

关 键 词：节能砌块隐形密框复合墙体 单面受火 轴压比 受火时间 恢复力模型 

分 类 号：TU398[建筑科学—结构工程]