CFRP加固RC连续梁负弯矩区试验研究  

Experimental Study on Strengthening Negative Moment Areas of RC Continuous Beams with CFRP

作　　者：周洋[1] 施卫星[1] 曹加良[1] 

机构地区：[1]同济大学土木工程学院,上海200092

出　　处：《结构工程师》2012年第1期134-139,共6页Structural Engineers

基　　金：国家重点基础研究发展计划973项目(2007CB714202)

摘　　要：通过1根未加固钢筋混凝土连续梁和2根在负弯矩区分别外贴一层和两层碳纤维布的钢筋混凝土连续梁抗弯试验,研究了在钢筋混凝土连续梁负弯矩区粘贴碳纤维布及碳纤维布粘贴层数对连续梁抗弯性能的影响。结果表明,在钢筋混凝土连续梁负弯矩区粘贴碳纤维布的加固方法能显著改善连续梁的抗弯性能,负弯矩区碳纤维的存在提高了连续梁的抗弯刚度,但随着碳纤维布层数的增多,碳纤维布的使用效率下降,理论计算值与试验值吻合较好,现有计算理论能够满足工程需求。Flexural loading tests were carried out on three RC continuous beams strengthened with CFRP at negative moment areas. The influence of CFRP amount on flexural load carrying capacity was investigated. The experimental results showed that the flexural load carrying capacity and flexural rigidity of midspan were increased effectively by the strengthening. The availability factor of CFRP decreases with the increase of the layer. The calculated results have good agreement with the experimental ones.

关 键 词：钢筋混凝土连续梁 碳纤维 加固 负弯矩区 受弯承载力 

分 类 号：TU375.1[建筑科学—结构工程]