偏心荷载作用下中柱节点冲切破坏后受力性能试验研究  

Experimental research on post-punching properties of interior slab-column connections subjected to eccentric load

作　　者：易伟建[1] 赵晋[1] 朱泽华[1] 

机构地区：[1]湖南大学土木工程学院,长沙410082

出　　处：《建筑结构》2016年第2期1-7,共7页Building Structure

基　　金：国家自然科学基金项目(51178175;51338004)

摘　　要：通过在加载柱头施加偏心荷载来模拟板柱结构局部节点失效后相邻节点在附加剪力和不平衡弯矩共同作用下的受力工况,对中柱节点冲切破坏前、后的试验现象及试验结果进行对比分析;此外,试验还选取纵向钢筋配筋率、穿柱钢筋布置方式为研究参数,对偏心荷载作用下板柱节点抗冲切以及冲切破坏后的受力性能和破坏机理进行研究;最后,采用规范计算公式对试件承载力进行预测并与试验结果进行对比。研究成果可为板柱结构抗连续倒塌设计提供参考。The results of an experimental and analytical study of interior slab-columns connections subjected to punching failure in the presence of the extra shear force and an unbalanced moment were presented,which characterized in the study by an eccentric load on the column. Moreover,the pre-punching and post-punching behavior and failure mechanism of slabcolumn connections with various longitudinal reinforcement ratio and the integrity reinforcement layout was studied under eccentric load action. In the end,a comparison with the predictions of the formulas proposed by codes and the experimental results was presented. Research results obtained may serve as a reference for making a rational design of anti-progressivecollapse structures.

关 键 词：中柱节点 抗连续倒塌 穿柱钢筋 偏心荷载 不平衡弯矩 冲切破坏后承载力 

分 类 号：TU375.2[建筑科学—结构工程]