摘要
针对高寒地区大跨径变截面连续梁桥温度效应问题,以黑龙江省依兰松花江公路大桥为例,采用有限元分析的方法,分别探讨了整体温度与温度梯度对桥梁结构竖向挠度的影响规律。结果表明,整体温度的温差与竖向挠度幅值呈正相关,且基本为线性关系;不管是整体温度还是温度梯度作用下,次边跨竖向挠度最大,中跨次之,边跨最小;与等截面连续梁桥不同,变截面连续梁桥在整体温度荷载作用下的竖向挠度不可忽略。
Aiming at the temperature effect problem of large - span variable cross - section continuous beam bridge in high and cold area, taking Songhua River Bridge in Yilan County of Heilongjiang Province as an example, the influence rules of bulk temperature and temperature gradient on vertical deflection of bridge structure are respectively discussed by adopting the finite element analysis method. The results show that, the temperature difference of bulk temperature is positively correlated with vertical deflection amplitude and basically shows linear relation. Whether under the influence of bulk temperature or temperature gradient, the vertical deflection of secondary side span is the largest, that of middle span is second, and that of side span is the smallest. Unlike uniform section continuous beam bridge, the vertical deflection of variable cross - section continuous beam bridge under the influence of bulk temperature load cannot be neglected.
出处
《北方交通》
2017年第2期6-9,共4页
Northern Communications
关键词
桥梁工程
大跨径连续梁桥
高寒地区
温度效应
Bridge engineering
Large - span continuous beam bridge
High and cold area
Temperatureeffect