剪力墙局部混凝土置换抗震性能试验研究  

Experimental study on seismic performance of partial displacement concrete of shear wall

作　　者：王欣[1,2] 黎杰 胡圣兴 李树明[2] 徐阳 WANG Xin;LI Jie;HU Shengxing;LI Shuming;XU Yang(School of Civil Engineering,Shandong Jianzhu University,Jinan 250101,China;Engineering Research Institute of Appraisal and Strengthening of Shandong Jianzhu University Co.,Ltd,Jinan 250013,China;Shandong Jiangu Special Professional Engineering Co.,Ltd,Jinan 250014,China)

机构地区：[1]山东建筑大学土木工程学院,济南250101 [2]山东建筑大学工程鉴定加固研究院有限公司,济南250013 [3]山东建固特种专业工程有限公司,济南250014

出　　处：《建筑结构》2023年第19期55-62,共8页Building Structure

基　　金：山东省自然科学基金面上项目“改性活性粉末混凝土加固砌体窗间墙的抗震机理研究”(ZR2022ME164);山东建筑大学工程鉴定加固研究院有限公司课题“改性活性粉末混凝土(MRPC)加固装配式节点抗震性能研究”(H19230Z);山东省重点研发计划(重大科技创新工程)“绿色智能建造和建筑工业化关键技术、成套装备及应用”(2021CXGC011204)。

摘　　要：为了研究剪力墙局部混凝土置换的抗震性能,设计制作了4片1∶2缩尺的剪力墙试件,分别为1片未达到设计强度剪力墙、1片原强度剪力墙和2片分别采用C50混凝土置换墙体两端、改性活性粉末混凝土(MRPC)置换墙体两端的剪力墙试件。对4片试件进行低周往复荷载试验,对比分析了各试件的破坏现象、滞回曲线、骨架曲线、耗能能力及位移延性。结果表明:置换试件的抗震承载力、耗能能力、延性、开裂荷载和峰值荷载均有显著提高。采用MRPC置换墙体两端的剪力墙试件在峰值位移和极限位移下较采用C50混凝土置换的剪力墙试件单循环耗能分别提高了36.6%、22.3%,峰值荷载提高了9.3%,MRPC中掺入的钢纤维和聚丙烯纤维增强了墙体的极限变形能力。In order to study the seismic performance of partial displacement concrete of shear walls,four 1∶2 scale shear wall specimens were designed and produced,among them,one shear wall with less than designed strength,one shear wall with original strength,and two shear wall specimens at the both ends of the wall respectively replaced by C50 concrete and modified reactive powder concrete(MRPC).Four shear wall specimens were tested under low cyclic reciprocating load,and their failure phenomena,hysteretic curves,skeleton curves,energy dissipation capacity and displacement ductility were compared and analyzed.The results show that the seismic bearing capacity,energy dissipation capacity,ductility,cracking load and peak load of the replaced specimens are significantly improved.The single-cycle energy consumption of shear wall specimens at both ends of the wall replaced by MRPC increases by 366%and 223%respectively under peak displacement and ultimate displacement compared with that of shear wall specimens replaced by C50 concrete,and the peak load increases 93%.The steel fiber and polypropylene fiber added to MRPC enhance the ultimate deformation capacity of the wall.

关 键 词：剪力墙 局部混凝土置换 改性活性粉末混凝土 抗震性能 

分 类 号：TU352.11[建筑科学—结构工程]