碳纤维复合材料改善钢结构疲劳性能研究现状  

State-of-the-art on Fatigue Behavior of Steel Structures Strengthened with Carbon Fibre Reinforced Polymer Materials

作　　者：余倩倩[1] 陈涛[1] 顾祥林[1] 

机构地区：[1]同济大学建筑工程系,上海200092

出　　处：《结构工程师》2011年第3期127-132,共6页Structural Engineers

基　　金：国家自然科学基金资助项目(50808139);上海市教育委员会和上海市教育发展基金会"晨光计划"项目(09CG16)

摘　　要：疲劳损伤是钢结构失效的重要原因,现有的补强及止裂方法存在各自的缺点,而碳纤维复合(CFRP)材料轻质高强,疲劳性能好,采用CFRP材料补强能够避免打孔、焊接等过程,具有其他方法所不能比拟的优点。通过对国内外关于CFRP材料改善钢结构疲劳性能的试验研究、数值模拟、参数分析等方面的研究现状及其成果的总结分析,表明CFRP材料对钢结构疲劳性能有明显的改善作用。已有的试验研究主要集中在梁式试件、板式试件和部分焊接接头三类试件;数值模拟基于断裂力学理论展开,采用有限元和边界元两种方法。但由于研究对象缺乏普遍性,分析方法存在重要假定,有关钢结构焊接接头疲劳性能补强方面的研究有待进一步加强,以便指导工程之用。Fatigue damage is one of the main failure modes for steel structures.Existing strengthening ways or crack arrest methods have their own shortcomings.The outstanding properties of carbon fibre reinforced polymer（CFRP）material such as high strength-to-weight ratio,excellent fatigue behaviour have made it an ideal alternative for steel plates in strengthening work.Furthermore,the strengthening method successfully avoids generating new hole or welding.The state-of-the-art on fatigue behaviour of steel structures strengthened with CFRP materials were summarized from several aspects as experimental,numerical and parametric analysis.Previous studies have demonstrated the CFRP application in improving fatigue behaviour of metallic structures.Three types of specimens that are beam,plate and welded joint are generally adopted in tests.Numerical simulation is usually carried out with finite element method or boundary element method based on fracture mechanics.However,previous studies are limited in specimen variety and analysis is still in exploratory stage.Further research for strengthening welded joints with CFRP is still needed to guide the engineering application.

关 键 词：碳纤维复合材料 钢结构 疲劳性能 试验研究 数值模拟 参数分析 

分 类 号：TU391[建筑科学—结构工程]