金属波纹管浆锚连接预制钢筋混凝土剪力墙声发射性能研究  

Study on Acoustic Emission Performance of Precast Reinforced Concrete Shear Wall with Metal Bellows Slurry Anchor Connection

作　　者：毕钰 秦拥军[1] 阳毅恒 陈奇 杨亮 BI Yu;QIN Yongjun;YANG Yiheng;CHEN Qi;YANG Liang(School of Civil Engineering and Architecture,Xinjiang University,Urumqi 830047,China)

机构地区：[1]新疆大学建筑工程学院,乌鲁木齐830047

出　　处：《材料导报》2024年第24期150-158,共9页Materials Reports

基　　金：自治区科技计划项目(2019E0231)。

摘　　要：为研究不同轴压比下现浇与预制剪力墙破坏机理的差异,本试验采用静力加载的方式,对三种墙(一种为整体现浇对比试件,另两种为采用金属波纹管浆锚连接的预制剪力墙)进行低周往复荷载试验。通过DIC与AE两种无损检测设备,运用b-value、能量、振铃计数、RA-AF值等特征参数进行定量分析。由试验现象和破坏特征发现:所有试件均出现了不同程度的墙角损伤,现浇对比试件的裂缝分布更为均匀,金属波纹管浆锚连接预制试件水平接缝处裂缝宽度最大。运用滑动时间窗口算法减小了某段数据过少而可能产生的b-value误差,可以更加有效直观地表征试件的损伤过程,较高的轴压比带来了更迅速和严重的破坏。各试件破坏模式相似,浆锚连接钢筋混凝土剪力墙承载能力接近现浇对比试件,达到“等同现浇”的效果。A proposed static loading scheme was adopted to conduct low circumferential reciprocating load tests on three pieces of walls,one for a monolithic cast-in-place comparison specimen and two for precast shear walls connected by metal bellows slurry anchors.Acoustic emission tests were conducted to investigate the similarities and differences in the damage mechanisms of cast-in-place and prefabricated as well as shear walls with different axial compression ratios,which were quantitatively analyzed via two types of NDT equipment,DIC and AE,and by using characte-ristic parameters such as b-value,energy,ringing counts,and RA-AF values.Observation of the test phenomena and damage characteristics revealed that:all specimens had corner damage with different degrees.The crack distribution of cast-in-place contrasting specimens was more uniform than the others,and the crack width at the horizontal joint of prefabricated specimens with metal bellows slurry anchor connection was the largest.The sliding time window algorithm was used to reduce the b-value error caused by too little data in a section,thus it can more effectively and intuitively characterize the damage process of the specimens.And higher axial compression ratios brought more rapid and severe damage.The damage patterns of these three specimens were similar,and the bearing capacity of the slurry-anchored reinforced concrete shear wall was close to that of the cast-in-place specimen,which achieved a effect of equivalent cast-in-place.

关 键 词：预制混凝土剪力墙 数字图像相关法 声发射 抗震性能 损伤分析 

分 类 号：TU375.4[建筑科学—结构工程]