不同初始应力对增大截面加固轴心受压RC柱受力性能的试验研究  

Experimental Study on Mechanical Behavior of RC Column Strengthened with Increasing Section under Axial Compression by Different Initial Stresses

作　　者：廖新雪 秦凌凌 张京街[2] 龚世豪 黄林青[3] Liao Xinxue;Qin Lingling;Zhang Jingjie;Gong Shihao;Huang Linqing

机构地区：[1]重庆中机中联检测技术有限公司工程检测中心,重庆400026 [2]重庆市建筑科学研究院,重庆400016 [3]重庆科技学院建筑工程学院,重庆401331

出　　处：《重庆建筑》2020年第7期44-47,共4页Chongqing Architecture

基　　金：重庆市建设科技计划项目“基于摩-剪模型的竖向混凝土构件被动加大截面的受力性能研究”(城科字2015第(1-40)号)。

摘　　要：为研究轴心受压RC柱增大截面加固后的受力性能,采用四围外包的加固方式对不同初始应力作用下的RC柱展开加固试验研究。试验结果表明:增大截面加固后的RC柱承载力有明显提升,抵抗变形能力增强,新增材料的应力应变明显滞后于原柱材料,初始应力水平越大,滞后现象愈明显。In order to study the mechanical behavior of RC column strengthened with increasing section under axial compression,the reinforcement experiments of RC column under different initial stresses were carried out by using the four-envelope reinforcement method.The test results showed that the bearing capaci-ty of RC column strengthened with increasing section is obviously improved,the resistance to deformation is enhanced,and the stress and strain of newly added materials are noticeably lagged behind that of original materials.At the same time,the larger the initial stress level,the clearer the lag phenomenon is.

关 键 词：轴心受压 增大截面加固 荷载试验 

分 类 号：TU312[建筑科学—结构工程]