北京站无站台柱雨棚主桁架设计研究

研究目的:通过对北京站无站台柱雨棚主体大跨度长悬挑桁架结构的设计研究,解决该项目实施过程中的关键问题,保证全国第一个无站台柱雨棚主体结构的安全可靠。研究方法:通过对项目进行综合分析,结合国内外本学科的研究结论,确定结构的多项计算参数。采用空间钢结构软件3D3S对结构进行计算和校核。研究结论:在北京站既有复杂站场条件和柱子截面尺寸受到限制、结构高度上下均受到制约的情况下,首次将雨棚柱设置在线路中间,采用双站台跨越大跨度及长悬挑结构等多项创新设计,实现了包括基本站台在内的所有站台无柱。该项研究解决了主体钢桁架在项目实施过程中的诸多难点,同时也表明大跨度钢结构适用于国内无柱雨棚建设。

Research on Main Truss Design of NO-platform-column Canopy in Beijing Railway Station

Research purposes: After research on the main body of no-platform-column canopies(the first in China) with large span and long-suspending-extending structure in Beijing railway station,the key problem in the period of canopy construction is solved,and the safety and credibility of main body of canopies are guaranteed.Research methods:The optional computing data of structure is made certain by colligating analysis on the project and integrating the result researched by the others of this subject in China.3D3S software which is steel structural calculating system is used by calculating and checking.Research conclusions:Under the complicated existing condition in the station,the section size of supporting columns and the structure height being limited,the columns are located among the tracks for the first time and some innovated design and technology are adopted,such as large span over-passing two platforms,long-suspending-extending(structure) and so on.Thus,it is realized that there are no columns on all platforms.This research resolved many(difficulties) in engineering process.On the other hand,it is(indicated) that large span and steel structure is the same with construction of(no-platform-column) canopies.