不同索面配置及橋塔斷面積變化 對高屏溪斜張橋穩定性之影響

Influence of the Arrangement of Cable-Stays and Tower cross section on the Stability of Kao-Ping-Hsi Cable-Stayed Bridge

陳連祥(Lian-Shiang Chen)

指導教授 ： 王寶璽

中原大學/工學院/土木工程研究所/碩士(2005年)

https://doi.org/10.6840/cycu200500449

摘要

本文應用有限元素法建立高屏溪單塔不對稱斜張橋穩定性分析模式與相關電算程式，藉電子計算機數值模擬分析，了解並掌握高屏溪斜張橋結構穩定特性。本文探討不同索面配置及橋塔斷面積變化對高屏溪斜張橋穩定性之影響。採用線性穩定分析方法，尋求全橋車流滿載情形下其臨界荷重值(critical loads)與對應之挫屈模態(buckling modes)，並藉由數值分析之結果，探討纜索預力、結構形狀配置與非線性效應對於斜張橋整體結構穩定性之影響。文中以五種不同索面配置型式以及四種橋塔斷面縮減模式，在考慮非線性效應包含樑-柱效應與纜索中垂效應作用下，對斜張橋的穩定性影響並與線性分析結果比較。應用本文所建立之分析理論與電算程式所得結果，可有效判斷橋樑結構的承載能力與運動行為，作為斜張橋設計及施工時之參考依據。

關鍵字

穩定分析 ； 高屏溪單塔不對稱斜張橋

並列摘要

The aim of study concerns with the stability analysis of the unsymmetrical Kao-Ping-Hsi Cable-Stayed Bridge. A finite element computation procedure has been set up for the stability analysis of such kind of structures. This text discusses to the influence of the arrangement of cable-stays and tower cross section on the stability of Kao-Ping-Hsi Cable-Stayed Bridge. The linear stability analysis method is used in search of critical loads and corresponding buckling modes when the bridges are subjected to full span uniform live loading. Based on the results of numerical analysis, the influences of the pretension force in cable stays, the shape of bridges and nonlinear effects on the stability of cable-stayed bridges will be also be studied. Fine kinds dispose modeling of cable-stayed and four kinds of tower sections in the article. Under the nonlinear effects including beam-column effect and cable sag effect are considered, to oblique pieces of stability influence and comparing with the linear analysis result of cable-stayed bridge. According to the extent of critical loads and corresponding buckling modes, the load capacity and active behavior of cable-stayed bridges could be judged efficiently.

並列關鍵字

stability analysis ； Kao-Ping-Hsi Cable-Stayed Bridge

參考文獻

20. 洪育煒，“斜張橋穩定性分析”， 私立中原大學土木工程研究所，碩士學位論文，台灣省，桃園縣，中壢市，民國93年6月

28. 鄭厚農，”斜張橋施工階段地震分析”，私立中原大學土木工程研究所，碩士學位論文，臺灣省，中壢市，民國92年12月

3. Fleming, J. F., “Nonlinear Static Analysis of Cable-Stayed Bridges Structures”, Int. J. of Computers & Structures, Vol.10, pp.621-635, 1979

4. Ghali, A. and Neville, A. M., “Structural Analysis: A Unified Classical and Matrix Approach”, 2nd ed., Chapman and Hall Ltd, London, 1978

5. Gimsing, N. J., “Cable Supported Bridges: Concept and Design”, John Wiley, Chichester, 1983