中文摘要：

碳纤维增强复合材料(CFRP)加固钢结构在实际工程中,往往遭受到湿热环境的影响而导致加固结构失效。通过对8个钢与CFRP板搭接接头试件的拉伸试验,分析干湿循环对钢和CFRP黏结界面的破坏模式和极限荷载的影响。试验结果显示:钢和CFRP板的搭接接头在干湿循环的影响下会显著降低其抗拉承载力,干湿循环90次后试件承载力趋于稳定;通过理论计算式推算出最大界面主应力试验结果与理论计算结果的偏差在15%以内,验证了理论计算式的准确性。

英文摘要：

When carbon fiber reinforced polymer ( CFRP ) was used in the actual steel structure reinforcement projects, structural failure often occurs due to the cyclic temperature and humid environment.This paper presented an experimental study on the tension capacity of 8 steel-CFRP strap joints including 2 specimens after 90 wet-dry cycles and 2 specimens after 180 wet-dry cycles.The ultimate bearing capacity, the failure characteristics of the steel and CFRP interface were studied after dry-wet cycles.The test results showed that steel-CFRP strap joints tensile bearing capacity decreased significantly under the influence of wet and dry cycles.Bearing capacity of the specimens stabilized after 90 times of wet-dry cycles.And through theoretical formula it was deduced results of maximum principal interface stress, which were compared with the test results and a deviation between the two was within 15%. Which verified the accuracy of theoretical formula.