RESEARCH ON DAMPING RATIO IDENTIFICATION OF BEAM BRIDGE BASED ON VEHICLE BRIDGE COUPLING THEORY

Yang Yang; Xu Wenming; Lu Huicheng; Yuan Aipeng; Tan Xiaokun; Bi Hesheng; Fang Guangjun; Tang Yan

doi:10.6052/0459-1879-21-691

Volume 54 Issue 5

May 2022

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Article Navigation > Chinese Journal of Theoretical and Applied Mechanics > 2022 > 54(5): 1387-1402

Yang Yang, Xu Wenming, Lu Huicheng, Yuan Aipeng, Tan Xiaokun, Bi Hesheng, Fang Guangjun, Tang Yan. Research on damping ratio identification of beam bridge based on vehicle bridge coupling theory. Chinese Journal of Theoretical and Applied Mechanics, 2022, 54(5): 1387-1402 doi: 10.6052/0459-1879-21-691

Citation:

Yang Yang, Xu Wenming, Lu Huicheng, Yuan Aipeng, Tan Xiaokun, Bi Hesheng, Fang Guangjun, Tang Yan. Research on damping ratio identification of beam bridge based on vehicle bridge coupling theory. Chinese Journal of Theoretical and Applied Mechanics, 2022, 54(5): 1387-1402 doi: 10.6052/0459-1879-21-691

Citation:

Yang Yang, Xu Wenming, Lu Huicheng, Yuan Aipeng, Tan Xiaokun, Bi Hesheng, Fang Guangjun, Tang Yan. Research on damping ratio identification of beam bridge based on vehicle bridge coupling theory. Chinese Journal of Theoretical and Applied Mechanics, 2022, 54(5): 1387-1402 doi: 10.6052/0459-1879-21-691

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RESEARCH ON DAMPING RATIO IDENTIFICATION OF BEAM BRIDGE BASED ON VEHICLE BRIDGE COUPLING THEORY

doi: 10.6052/0459-1879-21-691

Yang Yang^{*, †
,},
Xu Wenming^{*, †},
Lu Huicheng^{*, †},
Yuan Aipeng^{*, †},
Tan Xiaokun^{*, †},
Bi Hesheng^**,
Fang Guangjun^**,
Tang Yan^††

*.
Key Laboratory of New Technology for Construction of Cities in Mountain Area (Chongqing University), Ministry of Education, Chongqing 400030, China
†.
School of Civil Engineering, Chongqing University, Chongqing 400030, China
**.
Power China Chongqing Engineering Corporation Limited, Chongqing 400060, China
††.
Chongqing High-Tech Development and Construction Investment Group Co., Ltd., Chongqing 400039, China

Received Date: 2021-12-29
Accepted Date: 2022-03-22

Available Online: 2022-03-23

Publish Date: 2022-05-01

Abstract

Abstract

A damping ratio identification method of the simply supported beam based on the vehicle bridge coupling dynamics theory is proposed. Firstly, the test vehicle is designed as a single degree of freedom system according to the dynamic theory, and then the signal of the simply supported beam bridge response is obtained from the response signal of the contact point between the test vehicle and the simply supported bridge by using the sensor installed on the test vehicle. The signal including the first-order frequency of the simply supported beam bridge is filtered based on the principle of vehicle bridge coupling dynamics. Finally, the damping ratio of the simply supported beam bridge is assumed, The assumed first-order vibration mode of the simply supported beam bridge is obtained through the assumed damping ratio of the simply supported beam bridge, and the cycle is continued until the maximum value point of the first-order vibration mode calculated under the assumed damping ratio is in the middle, that is the identified real damping ratio of the simply supported beam bridge. This paper first explains the feasibility of this method from the theoretical derivation of vehicle bridge coupling dynamics, and then analyzes the vehicle bridge coupling dynamics model under the influence of different vehicle speed and unsteady vehicle speed, road roughness, environmental noise and other factors. Finally, it is preliminarily verified by real bridge test. The results show that this method can overcome the influence of external adverse factors to a certain extent, achieve the purpose of identifying the damping ratio of beam bridge, and provide a better method for identifying the damping ratio of simply supported beam bridge. It has the advantages of less parameter setting, simple and convenient operation and higher test accuracy, At the same time, it is helpful to promote the practical engineering application of the vehicle bridge coupling dynamics theory and technology based on vehicle bridge coupling in beam bridge modal parameter identification.
- vehicle-bridge coupling dynamic theory,
- beam bridge damping ratio,
- first mode shape

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References(36)

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