FREQUENCY IDENTIFICATION OF CONTINUOUS GIRDER BRIDGES BASED ON VEHICLE-BRIDGE COUPLING VIBRATION

QI Xingjun; YANG Xiaotian; WANG Shanshan; DING Xiaoyan; XIAO Zhiquan

doi:10.13204/j.gyjzG20061301

Volume 51 Issue 9

Jan. 2022

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QI Xingjun, YANG Xiaotian, WANG Shanshan, DING Xiaoyan, XIAO Zhiquan. FREQUENCY IDENTIFICATION OF CONTINUOUS GIRDER BRIDGES BASED ON VEHICLE-BRIDGE COUPLING VIBRATION[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(9): 150-155. doi: 10.13204/j.gyjzG20061301

Citation:

QI Xingjun, YANG Xiaotian, WANG Shanshan, DING Xiaoyan, XIAO Zhiquan. FREQUENCY IDENTIFICATION OF CONTINUOUS GIRDER BRIDGES BASED ON VEHICLE-BRIDGE COUPLING VIBRATION[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(9): 150-155. doi: 10.13204/j.gyjzG20061301

Citation:

QI Xingjun, YANG Xiaotian, WANG Shanshan, DING Xiaoyan, XIAO Zhiquan. FREQUENCY IDENTIFICATION OF CONTINUOUS GIRDER BRIDGES BASED ON VEHICLE-BRIDGE COUPLING VIBRATION[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(9): 150-155. doi: 10.13204/j.gyjzG20061301

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FREQUENCY IDENTIFICATION OF CONTINUOUS GIRDER BRIDGES BASED ON VEHICLE-BRIDGE COUPLING VIBRATION

doi: 10.13204/j.gyjzG20061301

1. School of Transportation Engineering, Shandong Jianzhu University, Jinan 250101, China;
2. Shandong Hi-Speed Group Co., Ltd., Jinan 250098, China

Received Date: 2020-06-13
Available Online: 2022-01-11

Abstract

Abstract

Recognition of bridge dynamic characteristics by vehicle vibration responses has the outstanding advantages of convenience, high efficiency and no impact on traffic. Constraint equations were used to simulate vehicle-bridge contact, the finite element calculation program of coupling vibration of vehicles and bridges was programmed. Based on the fundamental frequency information of bridges contained in vehicle vibration equations, the frequency of continuous girder bridge was identified by Fourier transform, and vehicle speeds, vehicle mass and road surface roughness were analyzed. The results showed that the fundamental frequency identified by vehicle vibration acceleration was in good agreement with the theoretical calculation results in the condition of pavement smoothness; in the case of pavement irregularity, the acceleration difference between two vehicles at the same position of the bridge were transformed by fast Fourier transform, it could greatly reduce the adverse effects of bridge surface roughness;the regularity of influence of speeds on frequency-recognition results was not obvious, and the lower speed was more appropriate; vehicle mass had little effect on the identification results; the grade of bridge deck irregularity had little effect on the identification of bridge frequencies.
- vehicle-bridge coupling vibration,
- continuous girder bridge,
- bridge frequency,
- FFT,
- vehicle vibration acceleration

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References(19)

References

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