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Condition-assessment-based finite element modeling of long-span bridge by mixed dimensional coupling method

Chan, Tommy H.T., Yu, Yang, Wong, K.Y., & Li, Z.X. (2008) Condition-assessment-based finite element modeling of long-span bridge by mixed dimensional coupling method. In Gao, Jinji, Lee, Jay, Ni, Jun, Ma, Lin, & Mathew, Joseph (Eds.) 3rd World Congress on Engineering Asset Management and Intelligent Maintenance Systems Conference (WCEAM-IMS 2008): Engineering Asset Management – A Foundation for Sustainable Development, 27–30 October 2008, Beijing, China.

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Abstract

Visual inspection has showed distinct limitations in practical application in condition assessment procedure of large civil infrastructures. The real condition of structure thus greatly depends on an accurate finite element model considering initial defects and deteriorating progress. For the purpose of fatigue damage evaluation of these structures, usually a global structural analysis using a global FE model is first conducted to determine the critical locations, based on which local analysis is then carried out to obtain the hot-spot stress distribution that is commonly considered as the fundamental information for the condition assessment. Since the structural characteristics behaved at the different scales, a mixed dimensional coupling method is obviously necessary and implemented by merging typical detailed joint geometry model into the global model so that the hot-spot stress could be directly output through a single step of analysis. As a case study, a multi-scale model of Tsing Ma Bridge (TMB) is then developed by aforementioned coupling method. The comparison of dynamic characteristics and static responses in term of first few natural frequencies and vertical displacement influence line data respectively between the calculated results and monitoring data indicated that the mixed dimensional coupling method adopted in this paper is convenient and appropriate, and even reliable and accurate for the purpose of condition assessment of long-span bridge structures. The accumulative fatigue damage due to the typhoon York showed that it is much severer than that caused by normal traffic loading, which indicated more attentions should be made after these ultimate events occurred.

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ID Code: 16720
Item Type: Conference Paper
ISBN: 9781848822160
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CIVIL ENGINEERING (090500) > Structural Engineering (090506)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Past > Schools > School of Engineering Systems
Past > Schools > School of Urban Development
Copyright Owner: Copyright 2008 Springer
Copyright Statement: This is the author-version of the work. Conference proceedings published, by Springer Verlag, will be available via SpringerLink. http://www.springerlink.com SpringerLink
Deposited On: 10 Dec 2008 08:24
Last Modified: 29 Feb 2012 23:52

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