In this paper, an analysis method in consideration of the nonlinearity of materials and geometry for gravity concrete piers in railway Bridges is studied.
本文针对单线铁路混凝土重力式桥墩，研究了考虑材料非线性和几何非线性的分析方法。
2
The paper puts forward an improved method on the basis of gravity model to forecast the od freight volume of railway luggage and parcel transportation.
对铁路行包od运量的预测提出一种基于重力模型的改进方法。
3
The limited height of the loaded railway freight cars' gravity center is an important standard in the loading and fastening rules of railway freight.