有限元素法分析大跨徑斜張橋 索塔錨固區應力

Stress Analysis of Anchorage Zone By Using the FEM of Long-Span Cable-Stayed Bridge

楊凱翔(Ku-Shon Young)

指導教授 ： 鄭金國

中原大學/工學院/土木工程研究所/碩士(2005年)

https://doi.org/10.6840/cycu200500576

摘要

中文摘要
大垮徑斜張橋為現代橋樑科技發展的一個重要的方向。主梁、主塔、斜拉索是構成斜張橋的三個主要構件。斜拉索在主塔上的錨固構造處理是斜張橋設計中必須考慮的重要細節，設計原則是要力求主塔受力明確，構造簡單，以方便斜拉索的施工與更換。由於錨固區受到強大的斜拉索力作用，因此，該處構造與傳力比較複雜且受力集中，需要在錨塊內配置預應力鋼腱，並做局部的分析研究。本文以台北縣某斜張橋作為案例，透過有限元素分析軟體ANSYS 8.1，探討錨塊在受到吊索拉力後的應力分佈情況，以確保斜拉索錨固區混凝土構造能符合設計應力的要求，達到安全的目的。

關鍵詞：斜張橋、混凝土錨塊、應力分析

關鍵字

斜張橋 ； 應力分析 ； 混凝土錨塊

並列摘要

Abstract
Long-span cable-stayed bridge is a very important trend of technological development of modern bridge. Cable-stayed bridge composed of three major components which are deck, pylon and cable. The anchorage design of the pylon is the key part of the design of cable-stayed bridge. The design principle focuses on the determinate design force with simple structural model to make the replacement of cables and construction feasible. The stress concentration phenomena of the anchorage zone could be very complicated and significant, therefore, prestressed steel bars are used to resist the cable force. In this paper, the numerical analysis of the anchorage zone of the cable-stayed bridge designed for Taipei metropolitan area is carried out by ANSYS 8.1, the analysis software of FEM. The goal is make sure the safety of the anchorage zone of the cable-stayed bridge.

Key words: cable-stayed bridge; concrete pylon; stress analysis

並列關鍵字

cable-stayed bridge ； stress analysis ； concrete pylon

參考文獻

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