THERMAL SCIENCE

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Shujun Fang

DAMAGE DETECTION OF LONG-SPAN BRIDGE STRUCTURES BASED ON RESPONSE SURFACE MODEL

ABSTRACT
In order to solve the problem of high risk and low precision of existing damage detection methods for long-span Bridges, a new method based on fourth-order polynomial response surface model is proposed. Response surface model is constructed by using fourth order polynomial function. The parameters of the finite element model of the bridge are modified according to the response surface model. Based on the finite element model, the modal strain energy before and after the damage of the element was calculated, and the damage index of the element was obtained, so as to realize the damage detection of the long-span bridge structure. Experimental results show that the proposed method can accurately detect the damage location of long-span Bridges under different damage conditions, and the detection error of damage degree is less than 1%, which has a broad application prospect.
KEYWORDS
response surface model, long-span bridge, fourth-order polynomial, structural damage, model fitting, detection
PAPER SUBMITTED: 1970-01-01
PAPER REVISED: 2019-08-30
PAPER ACCEPTED: 2019-09-03
PUBLISHED ONLINE: 2020-02-08
DOI REFERENCE: https://doi.org/10.2298/TSCI190528014F
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2020, VOLUME 24, ISSUE Issue 3, PAGES [1497 - 1504]
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Damage detection of long-span bridge structures based on response surface model

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence