So , the crucial need is using the advanced software theory and technical to develope a new bridge structure analysis system 因此,当前迫切需要运用先进的软件理论与技术,开发出一套先进的桥梁结构分析系统。
Along with the increasing in speed on the current line , it is more important of comfortable and safety in the passenger train 随着既有线提速，旅客列车的舒适性、安全性愈显重要，对桥梁结构的要求愈加严格。
It consists of two parts , calculation of cable curve for suspension bridge and geometric nonlinear analysis of bridge structure 全文主要包括两大部分：悬索桥主缆线形计算部分和桥梁结构几何非线性分析部分。
Load is a main factor to influence bridge . the main loads of rc bridge are deal load vehicle load which are random variables 荷载是桥梁结构上的主要作用之一，包括恒荷载及车辆荷载，它们均可以看成是随机变量。
In this paper , wind resistant of long span bridges in cantilever state is analysed , also , the usable formula of wind loading , inconstruction is given 本文首先分析了风对桥梁结构的作用，并且着重分析了桥梁的风致振动。
Bridge is the important construction in road system , and the construct analysis of bridge is the key to road reconnaissance survey and design 桥梁是公路上的重要的结构物,桥梁结构的计算分析是公路勘测设计中的关键。
The bridge not only resists the static loads but also the moving loads and the actions of vibrational inertia force of vehicle and bridge 这时，桥梁结构不仅承受静力的作用，还要承受移动荷载以及桥梁和车辆的振动惯性力的作用。
So , how to perform quality detection . evaluation and reinforce of bridges has become a research hotshot of foreign academia and domain of engineering 如何对桥梁结构进行质量检评和加固也已成为国内外学术界、工程界研究的热点。
Therefore , detection , evaluation and reinforce of bridges have become one important guarantee that ensures safety maintenance and normal use of it 于是桥梁结构的检测、评估和加固就成为结构安全养护、正常使用的保证措施之一。
Cross slab steering gear was applied to make the external prestressing tendons steer , in order to make the bridge structure stressed state more clear and safe 通过设置横隔板转向装置来适应预应力束转向，使桥梁结构受力明确、安全。
