REPAIR EFFECT OF FATIGUE CRACKS INITIATED AT OUT-OF-PLANE WELDED GUSSET JOINTS USING PRE-TENSIONED CFRP STRIPS IN CONSIDERATION OF RESIDUAL STRESS

摘要：

　　This paper deals with the repair of the typical fatigue cracks initiated at the out-of-plane welded gusset joints in the steel bridge using externally bonded pre-tensioned CFRP strips.The fatigue tests of three method types have been conducted as follows: the specimen without repair,with repair by non pre-tensioned CFRP strips and with repair by pre-tensioned CFRP strips.As a result,under the applied nominal stress ranges,the fatigue lives were improved drastically.In analytical evaluation,the 3D finite element analysis(FEA)was conducted in consideration the effect of the residual stress occurred at welded parts.The residual stress distribution was obtained from the experiments.The predictions of fatigue lives were analytically evaluatd and compared with the expereimental results.

关键词： CFRP strip pre-tensioning technique repair of fatigue crack welded joints residual stress

作者: Visal Thay Hiroya Itoh Hitoshi Nakamura Fan Lin

作者单位: Department of Civil and Environmental Engineering,Tokyo Metropolitan University,1-1 Minami-Osawa,Hac Ishikari LNG Tank No.4 Construction Office,Obayashi Corporation,4-3743-3 Shinkochuo,Ishikari-shi,Hok School of Urban Construction and Management,Yunnan University,No.2 Cuihu North Rd,Kunming City,China

会议类型: 国际会议

会议名称: the Sixth Asia-Pacific Conference on FRP in Structures (APFIS2017)(第六届亚太纤维增强复合材料结构工程国际会议暨第十届全国建设工程FRP应用学术交流会)

会议地点: 新加坡

会议语种:英文

页码: 1-4

在线出版日期: 2017-07-19（万方平台首次上网日期，不代表论文的发表时间）