高速铁路空心墩的温度应力研究

摘要

空心高墩由于内部通风不良等原因,当气温骤变时,桥墩表面温度迅速上升或降低,从而产生相当大的温差应力.结合高速铁路空心桥墩通用图的设计工作,以通用图中50m墩高的空心墩为例,采用有限元分析软件Midas FEA进行建模计算,分析了温度应力的分布规律,对桥墩配筋提出建议.%Because of high hollow piers' poor internal ventilation and other reasons, with sudden change of air temperature around piers, the surface temperatures of high hollow piers rise or drop quickly, thus, a rather big thermal stress is produced. Combining with the designs of standard drawings of hollow piers of high-speed railway, this paper studies temperature stress distribution rules of the hollow piers, taking the pier height of 50 meters as an example by means of the finite element analysis software MIDAS FEA to establish the model for calculating, and gives advice for the pier's reinforcement.