Title: Condition analysis of expansion joints of a long‐span suspension bridge through metamodel‐based model updating considering thermal effect
Abstract: Structural Control and Health MonitoringVolume 27, Issue 5 e2521 RESEARCH ARTICLE Condition analysis of expansion joints of a long-span suspension bridge through metamodel-based model updating considering thermal effect Qi Xia, Qi Xia orcid.org/0000-0002-5355-132X Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong KongSearch for more papers by this authorYong Xia, Yong Xia orcid.org/0000-0001-5319-5858 Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong KongSearch for more papers by this authorHua-Ping Wan, Corresponding Author Hua-Ping Wan [email protected] orcid.org/0000-0001-6111-9441 College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, China Correspondence Hua-Ping Wan, College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, China. Email: [email protected] for more papers by this authorJian Zhang, Jian Zhang orcid.org/0000-0002-9129-255X Jiangsu Key Laboratory of Engineering Mechanics, Southeast University, Nanjing, ChinaSearch for more papers by this authorWei-Xin Ren, Wei-Xin Ren College of Civil and Transportation Engineering, Shenzhen University, Shenzhen, ChinaSearch for more papers by this author Qi Xia, Qi Xia orcid.org/0000-0002-5355-132X Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong KongSearch for more papers by this authorYong Xia, Yong Xia orcid.org/0000-0001-5319-5858 Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong KongSearch for more papers by this authorHua-Ping Wan, Corresponding Author Hua-Ping Wan [email protected] orcid.org/0000-0001-6111-9441 College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, China Correspondence Hua-Ping Wan, College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, China. Email: [email protected] for more papers by this authorJian Zhang, Jian Zhang orcid.org/0000-0002-9129-255X Jiangsu Key Laboratory of Engineering Mechanics, Southeast University, Nanjing, ChinaSearch for more papers by this authorWei-Xin Ren, Wei-Xin Ren College of Civil and Transportation Engineering, Shenzhen University, Shenzhen, ChinaSearch for more papers by this author First published: 10 February 2020 https://doi.org/10.1002/stc.2521Citations: 21Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat Summary Expansion joints of bridges are vulnerable to damage due to the thermal expansion and contraction, vehicle traffic, and so forth. Currently, the temperature–displacement relationship model may be the only qualitative method for condition evaluation of bridge expansion joints using the field monitoring data. The quantitative assessment based on the finite element model updating techniques is heavy computational burden and time consuming. Therefore, a Gaussian process (GP) metamodel-based model updating method is proposed in this study and performed for the quantitative identification on the boundary condition of the expansion joints of Jiangyin Suspension Bridge using the long-term displacement and temperature monitoring data. At first, the relationship between the longitudinal boundary stiffness (LBS) and structural temperature is formulated on the basis of thermal effects of the bridge deck. The range of LBS is approximately estimated by the regression coefficients from 1-year monitoring data and is used as initial bounds for the subsequent model updating procedure. The GP metamodel is formulated to map the relationship between the LBS and the longitudinal displacements under the thermal effects. The LBS identification of the Jiangyin Suspension Bridge is performed within the fast-running GP metamodel. The results show that the longitudinal displacements using the updated LBS are in good agreement with the measurements, which verifies the effectiveness of GP metamodel-based model updating method in identifying the LBS of the long-span suspension bridge. Citing Literature Volume27, Issue5May 2020e2521 RelatedInformation