The study on critical wind velocity for several kinds of typical vehicles driving on the deck of the cable-stayed bridge

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Journal of Vibration and Shock ›› 2011, Vol. 30 ›› Issue (10) : 30-34，4.

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The study on critical wind velocity for several kinds of typical vehicles driving on the deck of the cable-stayed bridge

MA Lin1; HAN Wan-shui 2; LIU Jian-Xin2;lI Jia-wu

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Abstract

The critical wind velocity and driving velocity are studied for three kind of typical vehicles driving on the deck of cable-stayed bridge within strong side wind environment. The effect on vehicles’ side deviation relative to the bridge deck of bridge’s side buffeting and the character of following coordinate for vehicles’ moving equation are analyzed, the calculation formulas of relative side slipping and its velocity are attained. Based on the previous research, the wind-vehicle-bridge coupling vibration system including vehicles’ side moving degrees and pilot’s behavior is studied, and corresponding program code is written and tested. With a cable-stayed bridge engineering background, critical wind velocity are attained of three kind of typical automobiles driving on the bridge deck. Results show that the critical wind velocity will not be significantly influenced by controlling objective of driver behavior. The accident types of the different vehicles are possibly different. For box-type truck, critical wind velocity of side slipping is always lower than that of overturning. But for cars like Santana and Jia-bao, overturning accident will play a controlling role when driving velocity is high, while side slipping accident will do when driving velocity is low.

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bridge engineering / traffic safety / critical wind velocity / wind-vehicle-bridge / pilot's behavior

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MA Lin;HAN Wan-shui;LIU Jian-Xin;lI Jia-wu. The study on critical wind velocity for several kinds of typical vehicles driving on the deck of the cable-stayed bridge[J]. Journal of Vibration and Shock, 2011, 30(10): 30-34，4