【摘要】：目前世界上已有多座鋼-混凝土混合梁橋工程實例，但國內外尚無針對混合梁橋結合段的設計規(guī)范，設計依據不足；針對結合段的研究主要是對某項具體工程進行分析，而針對某一類型結合段的研究較少；針對PBL剪力鍵的研究主要采用推出試驗的方式，但推出實驗難以反映PBL剪力鍵在實際工程中真實的工作狀態(tài)�；谝陨显�，本文針對鋼-混凝土混合梁橋無格室結合段及其內部PBL剪力鍵進行分析研究，所得結論可為混合梁橋結合段設計提供參考。 首先利用有限元分析軟件ANSYS建立無格室結合段模型，分析模型在縱向彎矩、軸向力以及壓彎荷載作用下的變形及應力分布情況，研究無格室結合段的受力性能；其次建立對照模型，對比分析鋼箱梁過渡段加勁肋、承壓板以及混合區(qū)鋼頂、底板在結合段中的作用；最后建立帶有PBL剪力鍵的無格室結合段局部模型，分析PBL剪力鍵在結合段中的受力狀態(tài)，對局部模型進行參數化分析，研究五種參數對PBL剪力鍵在無格室結合段中抗剪性能的影響。 研究結果表明：鋼箱梁過渡段加勁肋對無格室結合段整體受力與傳力性能有較大影響；鋼箱梁頂、底板伸入混凝土箱梁能夠避免承壓板附近發(fā)生應力集中；增大PBL剪力鍵開孔直徑與鋼板厚度、提高混凝土的強度等級以及設置孔內貫穿鋼筋均能提高PBL剪力鍵在無格室結合段中的抗剪性能。
[Abstract]:At present, there are many examples of steel-concrete hybrid beam bridge in the world, but there is no design code for the composite beam bridge at home and abroad, so the design basis is insufficient. The research on the combination section is mainly about the analysis of a specific project, but the research on a certain type of joint section is less. The research on PBL shear bond mainly adopts the way of deducing test, but the deductive experiment can hardly reflect the real working state of PBL shear bond in the actual project. Based on the above reasons, this paper analyzes and studies the gridless section of steel-concrete hybrid beam bridge and its internal PBL shear bond. The conclusions obtained can provide a reference for the design of the composite section of the composite beam bridge. In this paper, the finite element analysis software ANSYS is used to establish the gridless chamber joint segment model. The deformation and stress distribution of the model under longitudinal bending moment, axial force and compression and bending loads are analyzed, and the mechanical behavior of the latticeless chamber joint section is studied. Secondly, a comparative model is established to analyze the effect of stiffening rib, bearing plate, steel roof and bottom plate in the steel box girder transition section. Finally, the local model of the cell-free chamber joint segment with PBL shear key is established, and the stress state of the PBL shear key in the joint segment is analyzed, and the parametric analysis of the local model is carried out. The effects of five parameters on the shear resistance of PBL shear bond in latticess bonding section were studied. The results show that the stiffening ribs in the transition section of the steel box girder have a great influence on the integral force and force transfer performance of the latticeless box girder, and the stress concentration in the concrete box girder can be avoided by the steel box girder roof and the bottom slab extending into the concrete box girder. Increasing the diameter of PBL shear bond and the thickness of steel plate, increasing the strength grade of concrete and setting the reinforcement through the hole can improve the shear resistance of the PBL shear bond in the latticeless chamber joint.
【學位授予單位】：天津大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U441

【參考文獻】

相關期刊論文 前10條

1 韓青;張毅剛;趙凱紅;;結構工程中接觸問題的數值計算方法[J];北京工業(yè)大學學報;2006年04期

2 胡建華;侯文崎;葉梅新;;PBL剪力鍵承載力影響因素和計算公式研究[J];鐵道科學與工程學報;2007年06期

3 宗周紅,車惠民;剪力連接件靜載和疲勞試驗研究[J];福州大學學報(自然科學版);1999年06期

4 徐國平;劉高;吳文明;唐亮;;鋼—混凝土結合部在橋梁結構中應用新進展[J];公路;2010年02期

5 王軍文;倪章軍;李建中;孫峻嶺;;石板坡長江大橋鋼混結合段局部應力分析[J];公路交通科技;2007年08期

6 金增洪;日本多多羅大橋簡介[J];國外公路;1999年04期

7 雷昌龍;鋼-混凝土組合橋中新的剪力連接器的發(fā)展與試驗[J];國外橋梁;1999年02期

8 陳開利,劉海燕;木曾川橋、揖斐川橋PC梁與鋼梁連接部位的設計和施工[J];世界橋梁;2005年02期

9 劉玉擎;;混合梁接合部設計技術的發(fā)展[J];世界橋梁;2005年04期

10 肖林;強士中;李小珍;衛(wèi)星;;考慮開孔鋼板厚度的PBL剪力鍵力學性能研究[J];工程力學;2012年08期

相關博士學位論文 前1條

1 黃彩萍;混合梁斜拉橋鋼混結合段受力性能的試驗研究與理論分析[D];華中科技大學;2012年

，

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