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Damage identification method of girder bridges based on finite element model updating and modal strain energy 被引量:12

Damage identification method of girder bridges based on finite element model updating and modal strain energy
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摘要 A timely and accurate damage identification for bridge structures is essential to prevent sudden failures/collapses and other catastrophic accidents.Based on response surface model(RSM)updating and element modal strain energy(EMSE)damage index,this paper proposes a novel damage identification method for girder bridge structures.The effectiveness of the proposed damage identification method is investigated using experiments on four simply supported steel beams.With Xiabaishi Bridge,a prestressed continuous rigid frame bridge with large span,as the engineering background,the proposed damage identification method is validated by using numerical simulation to generate different bearing damage scenarios.Finally,the efficiency of the method is justified by considering its application to identifying cracking damage for a real continuous beam bridge called Xinyihe Bridge.It is concluded that the EMSE damage index is sensitive to the cracking damage and the bearing damage.The locations and levels of multiple cracking damages and bearing damages can be also identified.The results illuminate a great potential of the proposed method in identifying damages of real bridge structures.
出处 《Science China(Technological Sciences)》 SCIE EI CAS CSCD 2015年第4期701-711,共11页 中国科学(技术科学英文版)
基金 The National Natural Science Foundation of China(Grant Nos.51178101 and 51378112) The University Graduate Student Scientific Research Innovation Plan of Jiangsu Province(Grant No.CXZZ13_0109) China Scholarship Council under Program for Graduate Student Overseas Study Scholarship
关键词 damage identification response surface model finite element model updating element modal strain energy damage index girder bridge 识别方法 损伤识别 模态应变能 桥梁结构 有限元模型修正 预应力连续刚构桥 轴承损坏 桥基
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