斜張橋的設計與振態分析

Design and Dynamic Analysis of Cable-stayed Bridge

溫佳敏(CHIA-MIN WEN)

指導教授 ： 鄭金國

中原大學/工學院/土木工程研究所/碩士(2003年)

https://doi.org/10.6840/cycu200300596

摘要

摘要

本文介紹斜張橋的組成、基本理論和結構設計分析，同時探討兩各案例分別以靜力分析和振態分析來做比較和驗證。靜力分析部份利用TANGO 程式，以2D 結構模式做分析，得到斜張橋在索力調整前後，主梁主塔的彎矩、軸力、變位、剪力圖等，拉索在索力調整前後的索力變化並討論其結果與理論做個比較和容許應力檢核。振態分析部份則利用SAP0000 nolinear ，分別以3D 和2D 結構模式得到基本振態的頻率和運動方式並討論是否合理。

關鍵字

斜張橋 ； 靜力分析 ； 振態分析

並列摘要

Abstract

The main contents of this study is to discuss the concept of the design of cable-stayed bridge and its structural analysis . Using static and dynamic analysis to investigate two real cases in Taiwan. TANGO program is used to build 2D structure model for static portion. With TANGO program, we can prestress cable forces and minimize the bending moment of the girder to a narrow band, we can also obtain axial force ,displacement and shear force of the girder and pylon. The output data is used to justify if the design is reasonable or not. In dynamic portion ,we use SAP2000 nonlinear program to get the lowest natural frequency of bending and torsion of the girder to avoid the coincidence which may induce the collapse of cable-stayed bridges.

並列關鍵字

static analysis ； cable-stayed bridge ； dynamics analysis ； pylon

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