兰新铁路西宁站弹性边界条件钢结构楼梯设计研究

针对目前大型火车站常用的大跨度钢楼梯结构采用独立计算模型与站房结构联合计算模型进行分析对比,揭示了楼梯结构在考虑支座复杂边界条件下杆件内力及自振特性的差异。结果表明,支座刚度对楼梯结构的内力及自振特性影响显著,是结构设计中不可忽略的重要因素。同时,建议类似工程楼梯结构设计应采用与主体结构联合分析的方法,以获得在复杂边界条件下楼梯结构真实的力学响应。

The Design of Steel Structure Stairs with Elastic Boundary Conditions in Xining Station on Lan~Xin Railway Line

In view of the present big railway stations with large span steel staircase structures,which are compared and analyzed by means of independent calculation model and combined station building calculation model,this paper reveals the differences in internal bar stress and self-vibration characteristics of the staircase structure under complicated boundary conditions. The results show that the bearing stiffness of stair poses significantly influence on the internal force and the self-vibration characteristics of the structure,which is one of the important factors in structural design. Meanwhile,it is suggested that similar project staircase structure design should employ combithe main structure of conjoint analysis method,in order to obtain the stair structure mechanics response of the real complicated boundary conditions.