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研究生:陳威志
研究生(外文):Wei Zhi Chen
論文名稱:梁翼切削與弱梁柱交會區共存型梁柱接頭韌性行為研究
論文名稱(外文):Experimental Responses of Steel Reduced Beam Section to Weak Panel Zone Moment Connections
指導教授:蔡克銓蔡克銓引用關係
指導教授(外文):K.C. Tsai
學位類別:碩士
校院名稱:國立臺灣大學
系所名稱:土木工程學研究所
學門:工程學門
學類:土木工程學類
論文種類:學術論文
論文出版年:1999
畢業學年度:87
語文別:中文
中文關鍵詞:梁翼削弱梁柱交會區塑性轉角
外文關鍵詞:reduced beam sectionbeam-to-column panel zoneplastic rotation
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本研究主要探討梁翼切削與弱梁柱交會區共存型接頭在反覆載重下之韌性行為,由於現行常用設計規範中並未對此型接頭有明確的設計規定,因此進行實尺寸鋼骨梁柱接頭試驗,施加反覆載重測試試體以瞭解梁與交會區相互之受力變形關係,以便進一步建議此型接頭之韌性設計方法。本試驗共計有五組試體,分弱交會區試體三組(RB1、RB2、RB5),強交會區試體兩組(RB3、RB4),並在每組試體梁翼加以圓弧型切削,切削量尺寸共有三種,分別為試體RB1、RB3一組,試體RB2、RB4一組,及RB5為另一組,梁翼與柱之銲接採用符合衝擊性要求之銲條E7016,並將起弧板去除後磨平。實驗結果顯示,每組試體之總塑性轉角均超過4%弧度,滿足AISC規範對特殊抗彎構架所要求的塑性變形容量,且梁翼接柱之銲道均未有破裂發生,由試驗數據得知,梁翼圓弧型切削之梁的應變固化係數約在1.2左右,而具較弱交會區之接頭均能與削翼之梁共同分擔塑性轉角,據此,本研究建議出設計此型梁柱接頭之韌性設計方法,試驗結果比較證實,此韌性設計方法能使梁與交會區有較良好的韌性分佈,而達共同消能的目的。
Five welded beam-to-column moment connections consist of reduced beam sections are cyclically tested. Key parameters include the amount of radius cut and the strength of the beam-column panel zone. Test results indicate that the average strain hardening ratio of the reduced beam section is 1.20. The total plastic rotation capacity of each specimen exceeds 0.04 radian. For strong panel zone joints, most of the plastic rotation concentrates in the reduced beam section. For weak panel zone joints, test results confirm that the amount of beam strength reductions can be reduced thereby delaying the initiation of the inelastic local buckling at the reduced beam section. Test results illustrate that properly proportioned and constructed moment connections employing the reduced beam section and the weak panel can possess excellent inelastic deformation capacity. The paper concludes with recommendations for the design of the reduced beam section and the weak panel in order to achieve well balanced inelastic deformations.
誌謝一
摘要二
目錄三
表目錄七
圖目錄八
照片目錄十二
第一章 緒論1
1.1 研究動機1
1.2 研究內容3
第二章 梁端削弱之力學行為與韌性設計5
2.1 前言5
2.2 文獻回顧5
2.2.1 BWWF梁柱接頭強度需求與供需原則6
2.2.2 MICHAEL梁端圓弧型切削之韌性設計8
2.3 BWWF梁柱接頭梁端圓弧切削之韌性設計10
第三章 梁柱交會區之力學行為與韌性設計12
3.1 前言12
3.2 梁柱交會區之力學行為12
3.3 梁柱交會區之韌性設計17
3.3.1 UBC(1994)中弱梁柱交會區之規定17
3.3.2 UBC(1997) 中弱梁柱交會區之規定18
3.4 梁端削弱配合弱梁柱交會區之韌性設計
3.5 梁柱交會區剪力變形與梁及柱變形分量
3.5.1梁柱交會區的剪力變形分量
3.5.2梁端的各變形分量
第四章 實尺寸鋼骨梁柱接頭試驗
4.1 試驗簡介
4.2 試體設計
4.3 試體製作與試驗裝置
4.3.1 試體製作與組裝過程
4.3.2 施力及側向支撐系統
4.3.3 量側系統
4.4 試驗方式
4.5 試驗過程
4.5.1 試體RB1
4.5.2 試體RB2
4.5.3 試體RB3
4.5.4 試體RB4
4.5.5 試體RB5
第五章 試驗結果與討論
5.1 概述
5.2 試體整體變形結果
5.3 試體各分量變形結果
5.3.1 梁變形分量
5.3.2 柱變形分量
5.3.3 梁柱交會區變形分量
5.4試體梁圓弧切削韌性設計方法之探討
5.5 試體梁柱交會區之受力變形關係
5.6 試體梁與梁柱交會區之相對變形
第六章 有限元素分析
6.1 概論
6.2 有限元素模型的建立與分析
6.3 分析結果與討論
6.3.1 梁與梁柱交會區之相對勁度
第七章 結論與建議
7.1 結論
7.2 建議
參考文獻52
附表55
附圖60
附照片103
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