Testing and Statistics Analysis on Dynamic Response of Expressway Bridge under Various Vehicles

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Journal of Vibration and Shock ›› 2012, Vol. 31 ›› Issue (20) : 116-120.

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Testing and Statistics Analysis on Dynamic Response of Expressway Bridge under Various Vehicles

WANG Tao, HAN Wan-shui, Huang Ping-ming

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Abstract

The dynamic response of the bridge under the traffic flowing is one of vital parameters for the vehicle-bridge coupling vibration analysis. In this paper, a methodology, employing the radar speed gun, the video recorder, and the dynamic strain tester in combination with manually recording is used to continuously and detailed investigate the traffic loads on the expressway bridge within 24 hours a day. In this investigation, firstly the dynamic responses of 8 pieces of beams of the bridge under 5650 individual vehicles driving through the bridge are recorded, secondly statistics analysis are made for the record of each girder, then in conjunction with the investigated traffic flowing samples, in terms of the vehicle type, some detailed statistics study is conducted on the collected records, and finally the space-time distribution laws of the dynamic response of the bridge under the traffic flowing are studied extensively. The result of this study could provide helpful theoretic guidance and supporting data for the vehicle-bridge coupling vibration research.

Key words

Expressway bridge / Traffic loading / Dynamic response / Trimodal distribution

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WANG Tao;HAN Wan-shui;Huang Ping-ming. Testing and Statistics Analysis on Dynamic Response of Expressway Bridge under Various Vehicles[J]. Journal of Vibration and Shock, 2012, 31(20): 116-120