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研究生:魏志霖
研究生(外文):Chih-Lin Wei
論文名稱:曲線箱型鋼橋內橫隔梁設計準則之研究
論文名稱(外文):A Study of the Design Criteria for Internal Diaphragms of the Curved Steel Box Girder Bridges
指導教授:徐耀賜徐耀賜引用關係
指導教授(外文):Yao T. Hsu
學位類別:碩士
校院名稱:逢甲大學
系所名稱:交通工程與管理所
學門:運輸服務學門
學類:運輸管理學類
論文種類:學術論文
論文出版年:2002
畢業學年度:90
語文別:中文
論文頁數:102
中文關鍵詞:內橫隔梁箱型鋼梁曲線鋼橋
外文關鍵詞:Curved Steel Bridges.Internal DiaphragmsSteel Box Girder
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曲線橋梁在曲率甚大之處,由於橋梁本身之偏心靜載重,加上其上之車輛活載重,為了抵抗其扭曲彎矩,常常必須以箱型梁作為其上部結構。平面曲線箱型鋼橋由於扭曲勁度大,因此,在無法利用土堤之高曲率高架橋路段與立體交流道通常會使用到。箱型鋼梁由於曲率、偏心載重且其斷面甚大之緣故,如未妥善處理箱型鋼梁中之內橫隔梁,由斷面畸變(Distortion)所產生之額外應變與應力會對箱型鋼梁之結構行為產生巨大之影響,這些影響在設計階段不易察覺,往往在施工階段才會發現。另一方面,現今之橋梁設計規範(例如AASHT0規範,日本之道路橋示方書,中華民國交通部之橋梁設計規範)中,對平面曲線箱型鋼梁中之內橫隔梁佈置並未作明確之設計提示,讓施工單位無可資利用之工程準則。本研究之重點即是在探討平面曲線箱型鋼梁設計時,如何適當地佈置內橫隔梁,並探討內橫隔梁勁度對曲線箱型鋼梁畸變行為之影響。本研究所得之結果可以提供曲線箱型鋼橋工程師在設計時有依循或參考之根據,使箱型鋼梁之斷面畸變不致於影響其整體橋梁之結構行為。
Curved steel box girders are often the only choice for the bridge superstructure because of the geometric limitation and high curvature which is the main reason for creating the large torsional load for curved bridges. Curved steel box girder bridges are widely used along the elevated bridges or at the interchange area due to their high torsional stiffness. Additional stresses may be induced if the internal diaphragms are not well arranged or designed for curved steel box girders. Because of the curvature, eccentric loading and the large box sections, the distortional behavior is not easy to be detected during the construction stages. Once the excessive distortional deformations are found during the construction stage, it is hard to handle. Although most of the design specifications have remarked the possible distortional behavior for curved steel box girders, the design criteria for the internal diaphragm systems inside the box girders are not well outlined. Therefore, the main purpose for this research project aims to well arrange the internal diaphragms so that the induced distortional behavior for the curved steel box girder bridges will be minimized or possibly be eliminated. The results of this research can be utilized by the engineers for the practical design purposes.
誌 謝………………………………………………………………Ⅰ
中文摘要………………………………………………………………Ⅱ
英文摘要………………………………………………………………Ⅲ
目 錄………………………………………………………………Ⅳ
圖 目 錄………………………………………………………………Ⅵ
表 目 錄………………………………………………………………Ⅷ
第一章 緒論……………………………………………… 1
1.1 前言…………………………………………………………… 1
1.2 研究目的……………………………………………………… 2
1.3 研究方法與流程……………………………………………… 3
1.4 預期成果……………………………………………………… 4
1.5 文獻回顧……………………………………………………… 5
第二章 箱型鋼橋之結構組成……………………………20
2.1 前言……………………………………………………………20
2.2 大梁……………………………………………………………20
2.3 橫隔梁系統……………………………………………………22
2.4 箱型鋼梁之畸變現象…………………………………………25
第三章 AASHTO曲線鋼橋設計規範 …………………39
3.1 前言……………………………………………………………39
3.2 大梁……………………………………………………………39
第四章 彈性基礎梁相似理論……………………………49
4.1 前言……………………………………………………………49
4.2 基本原理………………………………………………………49
4.3 彈性基礎梁相似法……………………………………………50
第五章 等值彈性基礎梁理論……………………………58
5.1 前言……………………………………………………………58
5.2 等值彈性基礎梁系統…………………………………………58
5.3 內橫隔梁勁度之推估…………………………………………62
第六章 實例分析…………………………………………69
6.1 前言……………………………………………………………69
6.2 模式正確性驗證………………………………………………69
6.3 設計準則研究…………………………………………………70
第七章 結論與建議………………………………………90
7.1 前言……………………………………………………………90
7.2 結論……………………………………………………………90
7.3 建議……………………………………………………………91
參考文獻 …………………………………………………92
附錄I 箱型斷面剪力係數之推導…………………… 98
附錄II 彈性基礎箱型梁之勁度矩陣…………………100
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