中国铁路和公路桥活荷载和偏转特征的概念比较

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中文4100字，英文2700个

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⒈介绍

到今天，桥梁结构的概念已经成为一个大家庭，它由汽车，火车或高速客车，行人，运输管道等等家庭成员组成。每种桥梁显现不同的形状以及大小。公路桥比铁路桥更加薄以及轻，同时高速铁路桥梁和普通速度铁路桥相比具有一些差异。除因为各种不同意义的计划的不同安全要求之外，主要的控制桥梁形状和大小的因素可以大概指定为提供了适当编码的活荷载和容许挠度。

这篇论文准备由三个参数确定中国铁路桥和公路桥之间的活荷载以及偏转特征概念比较，即活荷载的相等的密度，容许挠度以及刚度指数。

1. Introduction

Up to date, the concepts of bridge structures have become a large family, which consists of various family members served for automobiles, trains or bullet trains, pedestrians, transport tubes, and so on. Each type of bridges appears different shape and magnitude. Highway bridges are more slender and lighter than railway bridges, while high-speed railway bridges have some differences to ordinarily speed railway bridges. Besides different safety requirements for various projects of different significance, main factors governing the shape and magnitude of bridges could be mainly specified as live loads and allowable deflections provided in an appropriate code.

This paper intends to make the conceptual comparison of live loads and deflection features between railway bridges and highway bridges in China with three parameters, equivalent densities of live loads, allowable deflections and stiffness indexes.