粘钢加固钢筋混凝土梁剥离的有限元分析  

FEM (Finite Element Method) Analysis for Predicting Separation of Epoxy-Bonded “Thick” Steel Plates from RC (Reinforced Concrete) Beam

作　　者：雷开贵[1] 邓子辰[1] 徐红巾 

机构地区：[1]西北工业大学工程力学系,陕西西安710072 [2]重庆联盛建设项目管理有限公司,重庆400023

出　　处：《西北工业大学学报》2005年第1期125-128,共4页Journal of Northwestern Polytechnical University

基　　金：大连理工大学工业装备结构分析国家重点实验室开放基金资助

摘　　要：给出了针对粘钢加固钢筋混凝土梁的钢板剥离的有限元模型 ,定义了“剥离应力”与“剥离载荷”,并提出了加固钢板厚度优化设计的数值计算方法。基于建立的有限元模型 ,用 ANSYS软件对实例梁的剥离载荷进行了仿真分析。In the past decade, strengthening of RC beam by epoxy-bonded steel plates has become quite widespread in China. When the thin steel plate is relatively thick, failure generally occurs in a brittle way as thin steel plate separates from RC beam, resulting in sudden failure of RC beam. We explain in much detail how to predict the load at which thick steel plate separates from RC beam. Separation often occurs at the ends of thin steel plates where stress concentration is highest. Our FEM analysis takes much pain to capture the peak value of concentration. The good agreement of the computer simulation results with experimental results shows preliminarily that the proposed FEM model and analysis are feasible and effective.

关 键 词：粘钢加固钢筋混凝土梁 剥离 有限元 剥离应力 剥离载荷 

分 类 号：TU375[建筑科学—结构工程]