摘要
设计了4个榫卯接缝装配整体式剪力墙试件,通过拟静力试验研究了轴压比对墙体受力性能的影响,研究结果表明,墙体均发生弯曲破坏,榫卯接缝横向凸起根部预制混凝土剥落,减弱了墙体根部混凝土压溃区域,避免突然丧失承载力。榫卯接缝整体性良好,开裂时墙体位移角为1/780~1/560。随着轴压比的提高,榫卯接缝横向凸起根部预制混凝土剥落区域增加,但墙体根部混凝土压溃区域并未增加;试验轴压比达到0.30(设计轴压比0.54),破坏状态时根部混凝土未发生压溃现象,墙体在高轴压比下表现出良好的变形能力。提高轴压比,有助于提高墙体的刚度和承载力;但峰值荷载后刚度退化速率加快;位移延性系数降低。
Four monolithic precast concrete shear walls with mortise-tenon joints were designed,and the effect of axial load ratio on mechanical behavior has been investigated under cyclic loading.The results show that the flexural failure mode is exhibited in damaged walls in these tests.Due to the precast concrete spalling at the root of transverse protrusion of mortise-tenon joint,the crushing areas of concrete at the root of shear walls become smaller to avoid the abrupt bearing capacity loss.The mortise-tenon joints can ensure the reliable connection between different precast concrete slabs,and the cracking displacement angles of shear wall specimens are 1/780~1/560.With the increase of axial load ratio,the precast concrete spalling at the root of transverse protrusion of mortise-tenon joint is aggravated,but the crushing areas of concrete at the root of shear walls have no increase.Even though the experimental axial load ratio is 0.3(design axial load ratio is 0.54),the concrete at the root of shear walls is not crushed in failure state and the specimen still has good deformation capacity under high axial load ratio.As a conclusion,with the increase of axial load ratio,the flexural capacity and stiffness will increase,but the stiffness degradation rate will accelerate after peak load,and the displacement ductility will decrease.
作者
刘继良
王宝民
初明进
王博
张鹏飞
安宁
李祥宾
LIU Ji-liang;WANG Bao-min;CHU Ming-jin;WANG Bo;ZHANG Peng-fei;AN Ning;LI Xiang-bin(Dalian University of Technology,School of Civil Engineering,Dalian 116024,China;Beijing Advanced Innovation Center for Future Urban Design,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;School of Civil Engineering,Yantai University,Yantai 264005,China;Shandong Aikefu Building Technology Co.,Ltd,Yantai 264005,China)
出处
《工程力学》
EI
CSCD
北大核心
2021年第11期79-87,共9页
Engineering Mechanics
基金
国家自然科学基金项目(51778034)
山东省自然科学基金项目(ZR2018PEE024)
北京市属高校基本科研业务费专项资金资助项目(X18179,X19003)。
关键词
轴压比
榫卯接缝
装配整体式剪力墙
受弯承载力
连接性能
axial compression ratio
mortise-tenon joint
monolithic precast concrete shear walls
flexural capacity
connection behavior
