连续曲线箱梁受力性能和加固效果分析  

Performance Analysis and Reinforcing Effect Evaluation for Continuous Curved Box Girder

作　　者：刘乐平 许肇峰 LIU Leping;XU Zhaofeng(Guangdong Hualu Transport Technology Co.,Ltd.,Guangzhou 510420;Research and Development Center on Road Transport Safety and Emergency Support Technology ＆ Equipment,Ministry of Transport,PRC,Guangzhou 510420)

机构地区：[1]广东华路交通科技有限公司,广州510420 [2]公路交通安全与应急保障技术及装备行业研发中心,广州510420

出　　处：《广东公路交通》2018年第4期130-136,140,共8页Guangdong Highway Communications

摘　　要：调查连续曲线箱梁桥的裂缝分布,分析裂缝成因。结合桥梁加固前后的静载试验,对梁体在荷载作用下的挠度、应变和裂缝等力学性能指标进行测试。分析既有梁体病害对结构受力性能的影响,并对其维修加固效果进行评价。结果表明:对梁体施加体外预应力、底板粘贴钢板和封闭裂缝等加固措施,能够有效改善连续曲线箱梁桥的受力性能,并使其加固后承载能力得到较大幅度的提高。Investigate the crack distribution and analyze the causes of cracking of continuous curved box girder bridge,being combined with the static load test before and after the bridge reinforcing,the mechanical properties of the beam,such as deflection,strain and cracking have been tested under the load. The effect of the beam disease on the mechanical properties of the structure has been studied,and the effect of its maintenance and reinforcement has been evaluated. The results have shown that strengthening the external prestressing,sticking steel plates and closed beam cracks could effectively improve the mechanical performance of box girder bridges with cracks and enhance the bearing capacity of the box girder bridge.

关 键 词：连续曲线箱梁 受力性能 加固效果 分析 

分 类 号：U448.215[建筑科学—桥梁与隧道工程]