臺灣博碩士論文加值系統

我國於橋樑工程設計，拱橋之承拱構件、斜張橋或吊橋之塔柱構件，此類〝梁－柱構件〞（beam-column member）係以鋼骨結構來設計，則其斷面之幾何形狀將由數片薄鈑（thin plate）單元所構成。此類構材所能承受軸力與彎矩的能力我國頒布的公路橋梁設計規範，並無提供相關計算公式。本論文將以國內鋼結構極限設計法規範之條文，對含有細長肢材斷面之箱形柱進行軸立及彎矩承載力計算。

本研究以有限元素法建立一個分析模式，分別施以純軸力、純彎矩力與軸力加彎矩連合作用。並分別建立設置縱向加勁肋條與另外再加設橫膈版之箱形柱以sap2000程式進行分析。得出規範計算結果與實際分析之結果兩值加以比較。

最後由分析結果得知，依據規範所計算出來的強度，高於有限元素法之分析結果。所幸，若將有效斷面外的箱壁肢材作適當的加勁措施，則可大幅提高挫屈強

In bridge architecture, the arch mechanism of arch bridges and the mechanism of suspension bridges and cable-stayed bridges use beam-column member (which are molded from many thin plates) as a structural base material. The axle and bending integrity of these materials are regulated by the Ministry of Transportation and Communication under the Transportation and Bridge Architecture Regulations, yet they didn’t provide a way to calculate the integrity of the materials to meet their standards.

This research tested the axle strength, bending integrity, and the integrity of both combined using the finite element method. Starting with the design and development of longitudinal stiffened strip and the design and development of diaphragm’ Box column , and then testing both with the program sap2000. The data collected was then further calculated, compared, and analyzed.

The results of the research displayed that the data from regulations surpassed those using the finite element method. But if effective measures are taken in the cross-section outside , then the buckling strength with increase greatly.

摘要 i
Abstract ii
目錄 iii
圖目錄 v
表目錄 vi
符號定義 vii
第一章 緒論 1
1.1 引言 1
1.2 研究目的 2
1.3 研究方法 3
1.4 研究內容 4
第二章 文獻回顧與相關規範 5
2.1 文獻回顧 5
2.2 鋼結構極限設計法 8
第三章 研究原理與計算方式 9
3.1 研究命題與假設 9
3.2 有限元素分析 12
第四章 分析範例與討論 13
4.1 分析範例 13
4.2 討論 20
第五章 結論與建議 21
5.1 結論 21
5.2 建議 22
參考文獻 23
附錄： 24
SAP2000 分析範例說明 24

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