斜張橋索梁端鋼錨箱及索塔端混凝土錨塊之應力分析

Stress Analysis of Anchorage Zone located at Box-shaped Steel Deck and Concrete Pylon in Cable-Stayed Bridge

黃國峰(Kuo-Feng Huang)

指導教授 ： 鄭金國

中原大學/工學院/土木工程研究所/碩士(2004年)

https://doi.org/10.6840/cycu200400568

摘要

斜張橋吊索系統的錨固區域結構複雜且受力集中，往往是控制設計的關鍵部位。掌握錨固區域在索力的作用下，其應力的大小及分佈是相當重要的。本文針對台北縣某斜張橋作為案例，進行鋼箱梁主梁錨固的應力分析，透過有限元素分析軟體ANSYS，探討鋼錨箱在受到吊索拉力後的應力分佈及比較在不同勁度、形狀及網格下，錨箱能否降低其應力集中的現象，並與試驗結果作一比較。第二部分則是針對主塔的混凝土錨塊作應力檢核，透過分析軟體ANSYS，探討在吊索拉力的作用下，整個錨塊的抗拉及抗壓能否符合設計之應力要求。

關鍵字

混凝土錨塊 ； 應力分析 ； 鋼錨箱

並列摘要

The anchorage zones between box-shaped steel deck and cable in cable-stayed bridge are key to structure, which bear giant cable force and have complicated structure. It is very important to know the stress distribution of anchorage zones under cable forces. In this paper, the numerical analysis of cable-stayed bridge which will be located in Taipei has been carried out and the stress state has been studied by ANSYS, the analysis software of FEM. The stress distribution of the anchorage zones under cable force and the change of the stress state under various stiffness shapes, and meshes of the model have been discussed. The stress analysis of the concrete pylon in cable-stayed bridge has been checked through analysis software, ANSYS, and the stress distribution of the concrete pylon under cable force has been discussed.

並列關鍵字

concrete pylon ； steel anchorage box ； stress analysis

參考文獻

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21.Man-Chung Tang, “Analysis of Cable-Stayed Girder Bridges”, ASCE, ST5, May, (1971).

24.M. S. Troitsky, “Cable-Stayed Bridges Theory and Design”, Crosby Lock wood Staples, London, (1977).

參考文獻