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論文中文名稱:混凝土裂縫擴展參數之尺寸效應 [以論文名稱查詢館藏系統]
論文英文名稱:Size-effect of fracture parameters for crack propagation in concrete [以論文名稱查詢館藏系統]
院校名稱:臺北科技大學
學院名稱:工程學院
系所名稱:土木與防災研究所
畢業學年度:102
出版年度:103
中文姓名:王立言
英文姓名:Li Yen Wang
研究生學號:101428023
學位類別:碩士
語文別:中文
口試日期:2014-07-29
論文頁數:188
指導教授中文名:黃昭勳
指導教授英文名:Chao-Hsun Huang
口試委員中文名:蕭輔沛;王仲宇
口試委員英文名:Fu-Pei Hsiao;Chung-Yue Wang
中文關鍵詞:混凝土ANSYS LS-DYNA破壞力學斷裂過程區尺寸效應
英文關鍵詞:ConcreteANSYS LS-DYNAFracture MechanicsFracture process zoneSize effect
論文中文摘要:本研究之主要研究內容在於針對較大型純混凝土梁並預制裂縫進行模式 I (拉伸型裂縫)破壞力學試驗,其試驗形式採用三點彎矩試驗系統,比較材料間之極限強度、位移量、開口位移,並依照文獻推薦試體尺寸等比例放大進一步探討混凝土之尺寸效應與斷裂能,數值模擬方面採用ANSYS LS-DYNA 軟體助於實驗規劃階段破壞力學試驗裂縫擴展情形,採用混凝土材料模型為損傷混凝土(MAT072R3)模型,可考慮混凝土材料非線性與應變率效應,並比對應變率有無之差異性,此外,為驗證 LS-DYNA 模型正確性,逐步驗證線彈性材料與解析解答案、混凝土模型,以比對分析結果與實驗數據。
論文英文摘要:This study is the fracture mechanics experiment using three-point bending moment system, in accordance with the literature recommended specimen dimensions scaled enlarge. Further explore the size effect and fracture energy of concrete.Numerical simulation using ANSYS LS-DYNA software helps experiment planning fracture mechanics experiment and predict ultimate strength.Using concrete material model for damage concrete (MAT072R3) model, consider the nonlinear strain rate effect of concrete material, in addition, in order to verify the correctness of LS-DYNA model, linear elastic material gradually verification and analysis answers the case, the concrete model to compare the analysis results with the experimental data.
論文目次:中文摘要 I
英文摘要 II
誌謝 III
目錄 IV
表目錄 VI
圖目錄 VIII
第一章 緒論 1
1.1 研究動機與目的 1
1.2 研究內容與範圍 1
1.3 論文組織與構架 2
第二章 文獻回顧 3
2.1 破壞力學判定裂紋擴展方法 3
2.1.1 破壞力學發展 3
2.1.2 線彈性破壞力學 5
2.1.3 彈塑性破壞力學 11
2.1.4 混凝土破壞力學 14
2.2 數值模擬文獻回顧 17
2.2.1 ANSYS LS-DYNA 程式介紹 17
2.2.2 損傷混凝土模型 18
第三章 混凝土裂縫開裂模型 26
3.1 黏聚裂縫模型 26
3.1.1 虛擬裂縫模型 27
3.1.2 裂縫帶模型 31
3.2 等效彈性裂縫模型 32
3.2.1 兩參數斷裂模型 32
3.2.2 尺寸效應模型 35
3.2.3 混凝土雙 K 斷裂模型 38
第四章 實驗規劃與結果 40
4.1 實驗系統介紹 40
4.2 試體製作 69
4.3 實驗設備 83
4.4 實驗方法與流程 107
4.4.1 前置作業 107
4.4.2 試驗方法與流程 107
4.5 實驗結果與討論 115
4.5.1 抗壓試驗 115
4.5.2 劈裂試驗 120
4.5.3 三點彎矩破壞力學試驗 122
第五章 數值模擬分析 149
5.1 前言 149
5.2 抗壓試驗模擬 150
5.2.1 預先模擬 150
5.2.2 實際模擬 153
5.3 反力牆試驗模擬 156
第六章 結論與建議 163
6.1 結論 163
6.2 建議 164
參考文獻 165
附錄A. 168
附錄B. 172
附錄C. 176
附錄D. 182
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