摘要
利用ANSYS建立泰州长江大桥全桥模型,对车辆荷载模型进行简化,分析了随机车流作用下泰州长江大桥主梁的位移及内力动力响应.结果表明:随机车流作用下,主梁各截面的竖向位移静力响应曲线由若干个大的位移循环组成,竖向位移动力响应曲线围绕静力响应曲线小幅振动.车流集中于一跨时,该跨竖向位移值增加明显,另一跨竖向位移响应减小,两跨间相互影响.相比于1/4跨与3/4跨,主梁跨中截面的内力变化幅值较大.随着车速的增加,主梁不同位置冲击系数小幅增加,行车方式对冲击系数影响很小.
The finite element model for the whole Taizhou Bridge was established,the vehicle load model built, and dynamic response of main girder of Taizhou Bridge under random traffic flow was analyzed. Results show that under the random traffic flow,displacement static response of main girders at different sections consists of some large circles;the vertical displacement dynamic response vibrates slightly around the static response curve. When traffic converge on one span,the vertical displacement of this span increases obviously,the vertical displacement response of the other one span decreases,and the two spans influence each other. Compared with 1/4 span and 3/4 span,bending moment and axial force changes in the bisector of the span are large. As the travel speed in-creases,impact coefficient of different girder sections increases,travel mode having little effect on impact coeffi-cient.
出处
《江苏科技大学学报（自然科学版）》
CAS
北大核心
2015年第4期403-408,共6页
Journal of Jiangsu University of Science and Technology:Natural Science Edition
基金
泰州大桥科技研发项目(2013)
关键词
泰州长江大桥
主梁
随机车流
动力响应
三塔悬索桥
Taizhou Bridge
main girder
random traffic flow
dynamic response
three-tower suspension bridge
