预应力钢绞线-外包钢复合加固混凝土柱轴心受压试验研究  

AXIAL COMPRESSION PERFORMANCE OF CONCRETE COLUMNS STRENGTHENED WITH THE COMBINATION OF PRESTRESSED STEEL WIRE AND ANGLE STEEL

作　　者：司建辉[1] 赵侃 刘茂社[1] SI Jianhui;ZHAO Kan;LIU Maoshe(School of Civil Engineering and Architecture,Xi'an University of Technology,Xi'an 710048,China)

机构地区：[1]西安理工大学土木建筑工程学院

出　　处：《工业建筑》2018年第11期187-191,共5页Industrial Construction

基　　金：国家自然科学基金项目(51308455);西安理工大学科技创新计划项目(2015CX019)

摘　　要：通过对7根预应力钢绞线-外包钢钢筋混凝土短柱进行轴心受压试验,研究预应力钢绞线-外包钢复合加固后混凝土柱的破坏特征、轴压性能和破坏机理,对比了不同预紧力加固下混凝土柱的极限承载力、延性等轴压性能。试验结果表明:复合加固方式充分发挥了钢绞线和角钢加固混凝土柱的优势,使其协调作用,共同受力,较好地改善了原构件的力学性能。混凝土柱极限承载力大幅提升,延性也得到明显改善。在分析其破坏机理的基础上,提出了复合加固混凝土柱的轴心受压计算式。The paper presented a new method for concrete column strengthened with prestressed steel wire and angle steel.The research on axial compression of seven short concrete columns has been tested,the paper studied the failure characteristics,axial compression performance and failure mechanism of the columns strengthened with prestressed steel wire and angle steel,and also compared the ultimate bearing capacity and ductility of concrete columns strengthened with different pretension forces.The results showed that the combination strengthening method could greatly take the advantages of steel wire and angle steel,and the two materials would have a good working performance.The ultimate bearing capacity increased significantly and ductility was also obviously improved.Based on the analysis of failure mechanism,the formula of axial compression of the concrete column with combination strengthening was proposed.

关 键 词：预应力钢绞线-外包钢复合加固 轴心受压试验 破坏机理 承载力 延性 

分 类 号：TU398.9[建筑科学—结构工程]