移动荷载作用下曲线斜拉桥支座动态响应分析

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中图分类号：U448文献标识码：A

Dynamic Response Analysis of Curved Cable-stayed Bridge Bearings Under Moving Loads

CHEN Boyu¹，WANG Jingyu²，ZHANG Yunbo²* （1.Hebei Construction Engineering Group Co.， Ltd.，Shijiazhuang，Hebei O5Oo51，China; 2.School of Civil Engineering，Shijiazhuang Tiedao University，Shijiazhuang，Hebei O5oo43，China）

Abstract： In order to solve the problem of dynamic response of the support of the curved cable-stayed bridge of semi-floating steel box girder under the action of moving vehicles，the right width of the No.1 bridge of the main line of Taizicheng interchange was taken as the research object，the bridge model was established based on the finite element software ABAQUS，the moving load was used to simulate the driving process of the vehicle on the bridge，diferent vehicle speeds，different levels of bridge deck unevenness and eccentric load conditions were set，and the influence of moving vehicles on the bearing stress at the junction of the tower girder was explored，so as to provide reference opinions for the design and maintenance of related bridge types.The results show that the stress on the outer support is slightly greater than that on the inner support.In view of the large radius of curvature of the bridge，the speed of the moving vehicle has litle influence on the bearing stress，while the unevenness of the bridge deck and the eccentric load of the vehicle have a great influence on the bearing stress. At the same time，under the condition of internal and external eccentric load，the peak stress response of the support is almost unchanged，and the bridge is not prone to the phenomenon of the main girder rollover.

Key words： curved cable-stayed bridge with semi-floating system; steel box girder; bearing stresses; moving loads；dynamic responses

随着交通运输事业的快速发展，近年来，高速公路、城市立交和高架道路日益增多，以往道路设计服从桥梁设计理念的情况逐渐改变为一般桥梁设计服从道路要求的理念[1]。（剩余7880字）