CFRP加固在役混凝土简支T梁实桥荷载试验研究  

Experimental Study on Load Test of Concrete Simply Supported T-beam Bridge Reinforced by CFRP in Service

作　　者：周勇超[1] 郝宪武[1] 

机构地区：[1]长安大学公路学院,陕西西安710064

出　　处：《工程抗震与加固改造》2012年第5期51-55,共5页Earthquake Resistant Engineering and Retrofitting

基　　金：交通部交通运输行业联合科技攻关项目(编号:2010-353-333-140)

摘　　要：通过对利用CFRP加固的在役钢筋混凝土简支T梁桥荷载试验,研究了正常使用状态下的截面应力、刚度,证明CFRP能够与混凝土协调工作,对在役混凝土简支T梁的承载力提高幅度约为45.3%,刚度提高幅度约为52.7%。在考虑二次受力的基础上,推导了在正常使用状态下,CFRP加固混凝土简支T梁截面应力、短期刚度的计算方法,计算结果与实测结果吻合良好。Based on load test of concrete simply supported T-beam bridge reinforced by CFRP in service, the cross-section stress and stiffness in serviceability stage are analyzed in this paper. The results show that CFRP can be coordination with concrete and the carrying capacity of concrete simply supported T-beam is increased by about 45.3% , the stiffness is increased by about 52.7%. Considering the second force, the calculation methods of cross-section stress and stiffness of T-beam in serviceability stage are derived. the calculations are consistent with load test results.

关 键 词：CFRP 加固 混凝土简支T梁桥 正常使用状态 荷载试验 

分 类 号：U441[建筑科学—桥梁与隧道工程]