CFRP与钢板条复合加固钢筋混凝土双向板有限元分析  

Finite element analysis of RC two-way slabs combination strengthened with bonding CFRP strips and steel sheets

作　　者：李晓瑾[1] 卢亦焱[1] 张号军[1] 

机构地区：[1]武汉大学土木建筑工程学院,湖北武汉430072

出　　处：《武汉大学学报（工学版）》2014年第4期516-519,531,共5页Engineering Journal of Wuhan University

基　　金：国家自然科学基金项目(编号:50678136)

摘　　要：在CFRP与钢板条带复合加固钢筋混凝土(RC)双向板试验研究的基础上,采用有限元软件对CFRP与钢板条带复合加固RC双向板的受力性能进行非线性有限元分析.研究了复合加固板的荷载-挠度变化关系以及加固板的裂缝分布.分析了CFRP与钢板条带复合加固RC双向板的受力机理.分析结果表明,通过合理选取有限元模型,可以较好地模拟CFRP与钢板条带复合加固双向板的受弯性能.有限元分析结果和试验结果均表明,复合加固方法充分发挥了CFRP和钢板各自的优点,两者能很好地协调工作,显著提高板的开裂荷载、极限承载力以及变形刚度,并且使加固板保持较好的延性.Based on the experimental research on reinforced concrete（RC）two-way slabs combination strengthened with bonding carbon fiber reinforced polymer（CFRP）strips and steel sheets,the performing characteristics of the specimens bonded external CFRP and steel combined plates using finite element method（FEM）were investigated.The load-deformation and the distribution of the cracks were studied;and the mechanism of RC two-way slabs combination strengthened with CFRP strips and steel sheets was analyzed based on the numerical results.The analytical results indicate that the FEM results can effectively simulate the flexural behavior of RC two-way slabs combination strengthened with CFRP strips and steel sheets with the proper numerical model.The analytical and experimental results also indicate that the combined strengthening method can make full use of the advantages both of CFRP and steel,making them work harmonically,so as to greatly improve the cracking load,the load bearing capacity,and the bending stiffness,and keep better ductility.

关 键 词：CFRP 钢板 复合加固 钢筋混凝土双向板 有限元分析 

分 类 号：TU375.2[建筑科学—结构工程]