大跨度铁路客站站房屋盖结构性能分析

The Analysis of Large-span Railway Station Roof Structural Performance

针对呼和浩特东站站房大跨度钢结构屋盖的工程特性,进行结构的稳定性分析,得到结构的极限承载力上限,说明站房设计选型合理,同时可知风荷载及温度荷载对本站房结构的影响较大;进行考虑结构非线性的全过程分析,由于非线性的影响,结构的荷载系数有所降低,但是仍具有足够的安全储备,说明本工程的稳定性能良好,安全性高。对于大跨度屋盖结构的动力分析,进行考虑三维多点输入与一致地震动输入的比较,可以得到,在进行多维多点输入时,结构体型变化以及两翼处的内力有较大增加,而中部的内力有所降低,结构的位移响应变化差异性明显。

with Reference to the engineering characteristics of HuHeHaoTeDong long-span railway station roof structure the structure stability is analyzed and the upper limit of this structure ultimate bearing capacity is then obtained. The results show that the design is reasonable, and the wind load and temperature load are the main factors affecting the building structure of the station. With the whole process of structural nonlinear analysis, it is shown that the load coefficient decreases because of the nonlinear influence, but the structure still has enough safety reservation, which proves the good stability and high safety of the project. The dynamic analysis of large span structure with comparison of 3 -D multi-point input with uniform input concludes that when multi-support and multi-dimension input is conducted, the structural size change and the internal force at the flanks increase to a higher degree, while the internal force at the central part decreases, and the differences in displacement response of structure are obvious.