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contributor authorMing-Sheng Xue
contributor authorTing-Hua Yi
contributor authorChun-Xu Qu
contributor authorHong-Nan Li
date accessioned2025-04-20T10:14:49Z
date available2025-04-20T10:14:49Z
date copyright1/7/2025 12:00:00 AM
date issued2025
identifier otherJENMDT.EMENG-7991.pdf
identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4304303
description abstractA mode expansion method combined with a sparse point impact test strategy that establishes the relationship between the sparse flexibility matrix and the static response field of a bridge under a distributed load is proposed to efficiently identify the deflection field of a bridge under a goal load. The traditional full bridge test is converted into a dynamic test with a small number of points, which is more flexible and significantly reduces the cost of field testing while producing the same test results as the full bridge test. The proposed method is divided into three key steps. First, a mode weighted superposition model of the bridge deflection field is established, and the key modes are determined based on the modal change pattern after structural degradation. Then, the test points are optimized with the minimum number of points and the highest accuracy of generalized mode coordinate identification. Finally, an impact test is carried out on the optimized sparse test points to identify the corresponding modal flexibility, and the deflection field is reconstructed through the virtual loading method. A numerical example and a field test example are used to validate the proposed method.
publisherAmerican Society of Civil Engineers
titleDeflection Field Identification of Bridges under Goal Load Based on Mode Expansion Method with Sparse Test Points
typeJournal Article
journal volume151
journal issue3
journal titleJournal of Engineering Mechanics
identifier doi10.1061/JENMDT.EMENG-7991
journal fristpage04025001-1
journal lastpage04025001-14
page14
treeJournal of Engineering Mechanics:;2025:;Volume ( 151 ):;issue: 003
contenttypeFulltext


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