钢板不同加固方式加固锈蚀钢筋混凝土梁试验研究与有限元分析  

Experimental Research and Finite Element Analysis of the Corroded RC Beam Strengthened by Steel Plate with Different Strengthening Methods

作　　者：唐皇 王晗[4] 彭建新 TANG Huang;WANG Han;PENG Jianxin(School of Civil Engineering/National Demonstration Center for Experimental Civil Engineering Education,Hunan City University,Yiyang,Hunan 413000,China;Industry Key Laboratory of Transportation Infrastructure Security Risk Management,Changsha University of Science and Technology,Changsha,Hunan 410114,China;School of Civil Engineering,Changsha University of Science and Technology,Changsha,Hunan 410114,China;State Gird Hunan Power CompanyYiyang Power Supply Company,Yiyang,Hunan 413000,China)

机构地区：[1]湖南城市学院土木工程学院,土木工程国家级实验教学示范中心,湖南益阳413000 [2]长沙理工大学交通基础设施安全风险管理行业重点实验室 [3]长沙理工大学土木工程学院,长沙410114 [4]国网湖南省电力公司益阳供电分公司,湖南益阳413000

出　　处：《湖南城市学院学报（自然科学版）》2019年第5期6-12,共7页Journal of Hunan City University:Natural Science

基　　金：湖南省自然科学基金资助项目(2019JJ50023);湖南省教育厅科研项目(18C0855);长沙理工大学交通基础设施安全风险管理行业重点实验室开放基金项目(18KF04)

摘　　要：针对桥梁工程中钢筋锈蚀引起RC结构承载性能退化现象,设计了5片试验梁,采用粘钢加固的方式对锈蚀RC梁进行抗弯加固、抗剪加固和抗弯-抗剪组合加固﹒通过抗弯性能试验研究分析了这3种加固方式对锈蚀RC梁承载性能的影响,并用ABAQUS有限元软件对试验梁进行了数值模拟分析.研究结果表明:3种加固方式均能提高锈蚀RC梁的极限承载力和抗变形能力;不同的加固方式将导致不同的破坏模式;抗弯加固的锈蚀RC梁,其延性和刚度相比于锈蚀梁都得到了提高;组合加固梁的延性对比锈蚀梁延性降低了30.94%;抗剪加固梁的延性最好;采用的有限元数值模拟的方法能合理地反映试验结果.For investigating the degradation phenomena of the bearing capacity of RC structures caused by the steel bar corrosion in bridge engineering, five test beams are designed. The corroded RC beams are strengthened by flexure-strengthening, shear-strengthening and combined strengthening schemes. The influence of these three strengthening schemes on the bearing capacity of corroded RC beams are analyzed through the flexural experiments, and numerical simulation analysis are conducted by using software ABAQUS. The research results show that the ultimate bearing capacity and deformation stiffness can be improved by these three strengthening methods. The different strengthening schemes will lead to different failure modes. The ductility and stiffness of flexure-strengthening corroded RC beams are improved compared with that of corroded RC beam. The ductility of combine-strengthening beams is 30.94% lower than that of corroded beam. The ductility of shear-strengthening beams is the best. The finite element numerical simulation method can reasonably reflect the test results.

关 键 词：钢板加固 锈蚀RC梁 试验研究 有限元分析 

分 类 号：U445[建筑科学—桥梁与隧道工程]