钻芯后孔洞回填方式对混凝土偏压柱性能影响  

The influence of backfilling method on the performance of concrete bias column after coring

作　　者：周永林 张永胜[1] 郭昭胜[1,2] ZHOU Yonglin;ZHANG Yongsheng;GUO Zhaosheng(College of Architectural and Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, China;Civil Engineering Structure Laboratory, Taiyuan University of Technology, Taiyuan 030024, China)

机构地区：[1]太原理工大学建筑与土木工程学院,太原030024 [2]太原理工大学土木工程结构实验室,太原030024

出　　处：《中国科技论文》2018年第13期1539-1544,共6页China Sciencepaper

基　　金：国家自然科学基金资助项目(51408395)

摘　　要：设计4组4个相同构造的混凝土偏压柱,研究其在试件跨中钻芯后采用预制混凝土芯柱搭配环氧树脂黏钢胶、微膨胀混凝土2种填补方式对试件性能的影响,介绍了试件荷载-应变、荷载-位移以及承载力关系,观察了试件受压区高度变化;对试件进行两两对比,探讨试件相互之间极限承载力、极限位移的差异,以研究2种填补方式对试件缺陷的修复性。结果表明,缺陷试件利用预制混凝土芯柱填补对其性能提升较大,利用微膨胀混凝土修补孔洞后与未钻芯试件性能较为吻合。Four groups of concrete columns eccentric samples with the same structure were prepared to study the effect of the two filling methods of precast concrete core column with epoxy resin adhesive and micro-expanding concrete on the performance of the specimens after drilling core in the specimens.The relationship between load-strain,load-displacement and load-carrying force of the specimen was evaluated.The variance of the depth of the compression zone of the specimen was observed.The test specimens were compared in pairs to study the differences in the ultimate loading capacity and ultimate displacement among the specimens.The purpose was to study the reparability of the specimens by the two filling methods.It can be concluded that the specimens filled with precast concrete core columns had larger improvement of performance and the performance of the non-drilled core specimens was more consistent with the performance of the use of the slightly-expanded concrete to repair the hole.

关 键 词：混凝土柱 偏心受压 钻芯 填补方式 试验研究 

分 类 号：TU375.3[建筑科学—结构工程]