摘要
本文考虑斜拉桥几何非线性,应用弹性 塑性铰分析模型进行材料非线性分析,研究了主梁自重和车辆荷载作为增量荷载时结构极限承载能力。研究表明,所采用的方法可以追踪个别杆件进入塑性到结构整体失稳的全过程,确定出斜拉桥极限承载力。梁的自重和车辆荷载为增量荷载时,塔根处的主梁截面、塔的截面等较容易屈服。车道荷载中集中荷载的作用位置对斜拉桥塑性铰的发展、形成失效路径、极限承载力等有较大影响。
The elastic plastic hinge method is utilized in this paper for analysis of physical nonlinearity of long span cable stayed bridge including geometrical nonlinearity effects,and ultimate load capacity is also studied when considering the dead load of girders and vehicle load as the incremental loads.The results show that the whole procedure from the plasticity of single component to the bucking of the structure can be traced using the method,and the ultimate load of long span cable stayed bridge can also be calculated.The cross section of girder joined pylon and the cross section of pylon are likely yielded when considering the dead load of girders and vehicle load as the incremental loads.The position where there is concentrated load in the lane load has great effects on the generation process of plastic hinges of long span cable stayed bridge,failure path and ultimate load.
出处
《公路交通科技》
CAS
CSCD
北大核心
2004年第4期50-52,55,共4页
Journal of Highway and Transportation Research and Development
关键词
大跨度斜拉桥
极限承载能力
几何非线性
材料非线性
Long span cable stayed bridge
Ultimate load capacity
Geometrical nonlinearity
Physical nonlinearity
