早龄期预制叠合剪力墙收缩变形研究和开裂风险预测  

Investigation of shrinkage effect and prediction of cracking risk of precast superimposed shear wall at early ages

作　　者：吴曦 汪梦甫[1] WU Xi;WANG Mengfu(College of Civil Engineering,Hunan University,Changsha 410082,China)

机构地区：[1]湖南大学土木工程学院,湖南长沙410082

出　　处：《西安建筑科技大学学报（自然科学版）》2021年第1期61-68,共8页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51578225)。

摘　　要：为研究早龄期预制叠合剪力墙的收缩变形特性,制作了一片小尺寸预制叠合剪力墙试件并进行试验观测.通过对剪力墙内部自干燥和湿度扩散形成的湿度场计算,基于GL2000收缩模型,对预制叠合剪力墙收缩应变进行了计算分析,计算结果与试验结果吻合良好.比较了墙厚和外部环境湿度条件参数对预制叠合剪力墙收缩变形的影响,并对暴露在不同环境湿度条件下的早龄期预制叠合剪力墙开裂风险进行了预测.To investigate the shrinkage behavior of precast superimposed reinforced concrete shear wall(SRCSW)at early ages,one SRCSW specimen in small size was constructed and tested.The moisture field of the specimen developed by self-desiccation and moisture diffusion was analyzed.According to the GL2000 theory,the shrinkage response was calculated and the analytical results match well with the test results.Lastly,the influence of wall thickness and the environmental humidity on the shrinkage behavior was discussed and the cracking potential of SRCSW under different environmental humidity conditions was predicted.

关 键 词：叠合剪力墙 收缩 自干燥 湿度扩散 开裂风险 

分 类 号：TU375[建筑科学—结构工程]