Damage Localization of Simp ly Supported Beams Based on Deflection Influence Surfaces Calculated by Three-Dimensional Boundary Face Method

Authors

YIN Xinfeng, School of Civil and Environmental Engineering , Changsha University of Science & Technology , Changsha , Hunan 410114 , ChinaFollow
LUO Zonghao, School of Civil and Environmental Engineering , Changsha University of Science & Technology , Changsha , Hunan 410114 , China
YAN Wanli, School of Civil and Environmental Engineering , Changsha University of Science & Technology , Changsha , Hunan 410114 , ChinaFollow
KAIERSAER ∙Tuerdi, School of Civil and Environmental Engineering , Changsha University of Science & Technology , Changsha , Hunan 410114 , China ;Engineering Quality Supervision and Law Enforcement Detachment , Xinjiang Uyghur Autonomous Region Transport and Comprehensive Administrative Law E nforcement Bureau , Urumqi , Xinjiang 830099 , China

Corresponding Author

晏万里，男，博士研究生.E-mail：yanwanlibridge@163.com

Abstract

The deflection influence surface (DIS) of a spatial structure is difficult to calculate using the existing two-dimensional boundary element method.To address this issue,a damage localization method based on DIS calculated using the three-dimensional boundary face method (BFM ) was proposed.A custom BFM program with an internal loop was developed,and the internal forces and deformations of a square plate and a supported T-beam structure were calculated using the static method.By specifying the domain of the order of a bivariate polynomial function (BPF ),a secondary optimization program for influence surfaces was established,and the DIS with the minimum mean square error was obtained.The results calculated by BFM were compared with the analytical solutions,showing an error of no more than 1.8‰,which verifies the accuracy and effectiveness of using the BFM to compute DIS.Damage localization was studied based on the high-precision DIS,and a simply supported T-beam experiment was performed to validate the proposed method.The results show that,compared with traditional DIS-based damage localization methods,the proposed method improves damage localization accuracy by 28.6% and 16.7% under single and double damage conditions,respectively.The proposed method offers a more efficient numerical tool for damage diagnosis of bridges and other spatial structures.

Publication Date

8-15-2025

DOI

10.14048/j.issn.1671-2579.2025.04.012

First Page

95

Last Page

102

Submission Date

August 2025

Recommended Citation

Xinfeng, YIN; Zonghao, LUO; Wanli, YAN; and ∙Tuerdi, KAIERSAER (2025) "Damage Localization of Simp ly Supported Beams Based on Deflection Influence Surfaces Calculated by Three-Dimensional Boundary Face Method," Journal of China & Foreign Highway: Vol. 45: Iss. 4, Article 12.
DOI: 10.14048/j.issn.1671-2579.2025.04.012
Available at: https://zwgl1980.csust.edu.cn/journal/vol45/iss4/12

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