钢筋屈服后钢筋混凝土梁加固性能试验研究  

Experimental study on the performance of post steel-yielding reinforced concrete beams strengthened with CFRP sheets

作　　者：王逢朝[1] 李振宝[2] 吕晓[3] 马华[2] 

机构地区：[1]三明学院,福建三明365004 [2]北京工业大学,北京100022 [3]北京合生北方房地产开发有限公司,北京100124

出　　处：《土木工程学报》2010年第5期10-16,共7页China Civil Engineering Journal

基　　金：国家自然科学基金(50778008);城市工程安全减灾省部共建教育部重点实验室开放基金项目;北京市重点实验室开放基金项目(EESR2008-21)

摘　　要：通过对加载超过钢筋屈服强度的不同损伤钢筋混凝土梁采用碳纤维布加固后进行承载力和延性试验,探讨了碳纤维布用量对不同损伤程度钢筋混凝土梁承载力、刚度、延性等方面的影响。研究结果表明,对于加载不超过钢筋屈服位移三倍的钢筋混凝土梁,采用碳纤维加固后,极限承载力有不同程度的提高,刚度也有较大的提高,说明采用碳纤维布加固损伤程度较为严重的钢筋混凝土梁的方法是可行的,试验结论能够为工程实际中已损伤结构的维修加固提供参考。Through experiment of concrete beams that are strengthened with CFRP sheets after yielding of the reinforcement,the differences in carrying capacity,rigidity and ductility of the concrete beams with different amounts of CFRP sheets were discussed.The experimental results showed that both the ultimate load and the rigidity of the concrete beams strengthened with CFRP sheets were increased,indicating the feasibility of strengthening damaged reinforced concrete beams with CFRP sheets.

关 键 词：损伤 刚度 极限承载力 延性 碳纤维布加固 

分 类 号：TU378.2[建筑科学—结构工程]