超大跨度斜拉桥自适应无应力构形控制理论及应用研究

项目名称： 超大跨度斜拉桥自适应无应力构形控制理论及应用研究

项目编号： No.50878030

项目类型： 面上项目

立项/批准年度： 2009

项目学科： 交通运输

项目作者： 颜东煌

作者单位： 长沙理工大学

项目金额： 35万元

中文摘要： 由于超大跨度斜拉桥结构的高度柔性化，给斜拉桥的设计与施工带来一系列技术难题。本项目旨在斜拉桥的施工全过程分析及其施工控制理论与应用技术方面展开深入研究。具体研究内容为：（1）基于有限位移理论,研究斜拉桥结构正装计算时的非线性有限元模型和正装迭代算法；（2）研究斜拉桥的塔、梁和索的无应力构形的计算理论与方法及其现场实现技术；（3）建立斜拉桥自适应无应力构形控制理论的控制模型和控制系统，研究参数识别和预测的非线性分析理论，建立斜拉桥无应力构形的优化调整算法；（4）研究结构线形、拉索索力等精度控制的关键技术，建立斜拉桥施工控制精度的评价体系与方法；（5）开发基于自适应无应力构形控制理论与算法的系统软件，并在实桥上进行应用和验证。项目成果可为超大跨度斜拉桥的设计计算和工程控制提供理论基础及技术支撑，从而促进我国斜拉桥从千米级迈向更大的跨度。

中文关键词： 斜拉桥；施工控制；非线性；自适应；无应力构形

英文摘要： Because of the high structural flexibility for super long-span cable-stayed bridge, there are series technology difficulties on the design and construction for the bridge. The purpose of this project is to study deeply on the analysis of construction stage, construction control theory and its applicable technology of cable-stayed bridge. The research works can be list as follows: 1 Based on theory of finite displacement, nonlinear finite element model and iteration arithmetic of forward-construction applied on forward-construction of cable-stayed bridge will be studied. 2 The calculation theory and methods of zero-stress shapes and its corresponding technology in site are studied about the tower,beam and cable of cable-stayed bridge 3 Physical control model and system will be established for self-adaptive zero-stress shapes control theory for cable-stayed bridge, and the nonlinear analysis theory is studied on parameter estimation and forecast, and the adjusting algorithm are also established to optimize the zero-stress shapes of cable-stayed bridge 4 The key control technology of accuracy for structure shape and cable force is studied, and the evaluation system and methods are established about the accuracy of construction control for cable-stayed bridge. 5 Systemic sofeware is developed which is based on control theory and algorithm of self-adaptive zero-stress shape, and is applied and tested in a actual bridge. The results of the project will provide theoretical basis and technological supports for design and construction control of super long-span cable-stayed bridge, which can help to promote the development of cable-stayed bridge from the kilometers span to the longer.

英文关键词： cable-stayed bridge; construction control; nonlinear; self-adaptive; zero-free shapes