摘要
针对移动车辆作用下半漂浮体系钢箱梁曲线斜拉桥支座的动态响应问题,以太子城互通式立交主线1号桥右幅为研究对象,基于有限元软件ABAQUS建立该桥模型,采用移动荷载模拟车辆在桥上的行驶过程,设置不同的车速、不同等级的桥面不平度以及偏载工况,探究移动车辆对该塔梁交接处支座应力的影响,为相关桥型的设计和维护提供参考意见。研究结果表明,外侧支座受力略大于内侧支座。鉴于桥梁的曲率半径较大,移动车辆的车速对支座应力影响较小,而桥面不平度和车辆偏载对支座应力影响较大。同时,内外偏载工况下,支座的应力响应峰值几乎无差别,该桥并不易出现主梁侧翻现象。
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,different 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 little 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.
作者
陈博宇
王竞宇
张运波
CHEN Boyu;WANG Jingyu;ZHANG Yunbo(Hebei Construction Engineering Group Co.,Ltd.,Shijiazhuang,Hebei 050051,China;School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang,Hebei 050043,China)
出处
《河北工程大学学报(自然科学版)》
2025年第4期57-62,69,共7页
Journal of Hebei University of Engineering(Natural Science Edition)
基金
国家自然科学基金资助项目(51778377)。
关键词
半漂浮体系曲线斜拉桥
钢箱梁
支座应力
移动荷载
动态响应
curved cable-stayed bridge with semi-floating system
steel box girder
bearing stresses
moving loads
dynamic responses
