站区曲线钢箱梁桥稳定性探讨

研究目的:站区内高架桥多受铁路、站台和景观等限制,在跨度和线形等方面不尽合理.在设计受限的情况下,站区桥梁常设计为失稳风险较高的单支点曲线箱梁的形式.本文以天津西高架桥为例,研究提高其稳定性的合理措施,以保证站区高架桥的安全性和景观性的协调.研究结论:通过有限元方法建立计算模型,并进行针对性分析.研究结果表明,空间模型可较真实地模拟曲线钢箱梁的受力特点,选择适宜的墩梁固结措施可有效降低曲线钢箱梁的倾覆风险,同时合理选择结构的支点偏心值亦可提高结构的稳定性与安全性.文中研究结果对类似工程有一定借鉴意义.

Discuss on the Stability of Steel-box-girder-bridge in Railway Station Area

Research purposes: It is not rational in the span and linear for Viaduct in station area limited by railway,site,landscape and so on.With design of bridge component limited,bridges in station area are often designed as single support curved girder,which has more risk of overturning.This paper based on the analysis of the West Railway Station in Tianjin,studied the relevant measures to improve its stability and ensure the safety of viaduct in station area and the coordination of landscape. Research conclusions:After a targeted analysis,through spatial models established by the finite element method,the data shows that spatial models can truly simulate the forcing property of single support curved girder bridges.And it also shows that,the appropriate choice of pier beam consolidation measures can effectively reduce the risk of overturning,and reasonable eccentricity of structure can improve the stability and security of different structures.It may provide reference in bridges of the same structure.