带竖向接缝装配式剪力墙易损性研究  

FRAGILITY CURVES OF PRECAST CONCRETE SHEAR WALLS WITH VERTICAL JOINTS

作　　者：刘雷 孙志娟 刘继良[3] 初明进[1] LIU Lei;SUN Zhi-juan;LIU Ji-liang;CHU Ming-jin(Beijing Advanced Innovation Center for Future Urban Design,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Innovation Center of Engineering Practice,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;School of Civil Engineering,Yantai University,Yantai 264005,China)

机构地区：[1]北京建筑大学北京未来城市设计高精尖创新中心,北京100044 [2]北京建筑大学工程实践创新中心,北京100044 [3]烟台大学土木工程学院,烟台264005

出　　处：《工程力学》2024年第S01期150-156,共7页Engineering Mechanics

基　　金：北京市自然科学基金项目(8222012)。

摘　　要：竖向接缝是装配式剪力墙结构中的关键部位,对57个足尺带竖向接缝的装配式剪力墙试验数据进行了易损性分析。依据该类剪力墙构件试验过程的破坏模式提出了5个损伤状态;以位移角为工程指标参数,建立了该类剪力墙的易损性曲线和各损伤状态下的易损性参数;并量化评价了设计轴压比和剪跨比2个关键设计参数对其易损性的影响;对比分析了直接拼接和后浇带拼接两种竖向接缝形式对该类试件易损性参数的影响。结果表明:除竖向接缝混凝土出现掉渣,受压区保护层轻微脱落外,其余损伤状态下的易损性曲线基本满足对数正态分布;直接拼接装配式剪力墙和后浇带拼接装配式剪力墙之间的易损性参数在竖向接缝混凝土结合面开裂,边缘纵筋屈服损伤阶段存在差异,该阶段对应的位移角拟合中值绝对差值和相对差值分别达到0.11%和28.2%。The vertical joint is the key part of assembled shear wall structures.In this paper,the fragility analysis of 57 full-scale assembled shear wall test data with vertical joints is carried out.According to the failure mode of the test process of this kind of shear wall members,five damage states are proposed.Taking the drift angle as the engineering demand parameter,the fragility curve of this kind of shear wall and the fragility parameters under each damage state are established.The influence of two key design parameters,axial force ratio and shear-span ratio,on the fragility was quantitatively evaluated.The influence of two vertical joint forms of direct splicing and post-pouring belt splicing on the fragility parameters of this kind of specimens was compared and analyzed.The results show that,except for the concrete slag in the vertical joints and the protective layer in the compression area falling off slightly,the fragility curves in other damage states basically follow the logarithmic normal distribution.The fragility parameters between the direct spliced fabricated shear wall and the post-cast strip spliced fabricated shear wall are different in the vertical joint concrete joint surface cracking and the edge longitudinal reinforcement yield damage stage.The absolute difference and relative difference of the corresponding displacement angle fitting median value in this stage reach 0.11%and 28.2%,respectively.

关 键 词：竖向接缝 装配式剪力墙 损伤状态 易损性曲线 RC剪力墙 

分 类 号：TU398.2[建筑科学—结构工程]