本文選題：鋼—混凝土組合梁 + 非線性有限元分析��； 參考：《石家莊鐵道大學》2013年碩士論文

【摘要】：鋼—混凝土組合梁作為一種性能良好的組合結(jié)構(gòu),能夠充分發(fā)揮鋼梁的抗拉強度和混凝土的抗壓性能,具有承載力高、剛度大、延性好、節(jié)省材料等種種優(yōu)點。隨著高強鋼材和高性能混凝土的研制和應用以及設計和施工技術(shù)的發(fā)展和完善,鋼—混凝土組合梁將擁有越來越廣泛的應用前景。本文在前人研究成果的基礎上,對組合梁的力學性能進行了分析。研究的主要內(nèi)容包括： (1)對組合梁性能進行理論分析,歸納總結(jié)了組合梁的有關(guān)計算公式。研究了考慮滑移與不考慮滑移時,鋼—混凝土組合梁的正截面受彎承載力計算方法。分析了滑移對組合梁撓度、彈性抗彎強度及極限抗彎強度的影響,并建立了相應的計算公式,為工程設計提供指導。 (2)根據(jù)組合梁的特點,選擇合適的單元類型和材料本構(gòu)關(guān)系,利用ANSYS建立有限元模型。通過非線性有限元分析,得到相應的荷載—撓度過程曲線。在集中荷載作用下,模擬計算結(jié)果與試驗情形吻合良好；在均布荷載作用下,模擬計算的結(jié)果與經(jīng)驗公式計算結(jié)果也基本相符。說明可以利用有限元模型研究組合梁的工作性能。 (3)利用有限元模型對組合梁的極限承載力和滑移性能進行研究。通過對荷載—撓度曲線和荷載—滑移曲線的分析,研究三種抗剪連接度組合梁的極限承載力、剛度和滑移性能特點。在此基礎上對組合梁進行了參數(shù)分析,研究混凝土強度等級、鋼梁強度、截面尺寸等參數(shù)變化對組合梁極限承載力、剛度以及滑移性能的影響。并研究采用不同抗剪連接度時,這些參數(shù)對組合梁性能影響的改變。
[Abstract]:Steel-concrete composite beam, as a kind of composite structure with good performance, can give full play to the tensile strength of steel beam and the compressive performance of concrete. It has many advantages, such as high bearing capacity, high stiffness, good ductility and saving materials. With the development and application of high strength steel and high performance concrete, as well as the development and improvement of design and construction technology, steel-concrete composite beams will have more and more extensive application prospects. On the basis of previous research results, the mechanical properties of composite beams are analyzed in this paper. The main contents of the study include: 1) the performance of composite beam is analyzed theoretically, and the calculation formula of composite beam is summarized. The calculation method of normal section flexural bearing capacity of steel-concrete composite beams with or without slip is studied. The effects of slippage on deflection, elastic flexural strength and ultimate flexural strength of composite beams are analyzed, and corresponding calculation formulas are established to provide guidance for engineering design. 2) according to the characteristics of composite beam, the appropriate element type and material constitutive relation are selected, and the finite element model is established by ANSYS. Through nonlinear finite element analysis, the corresponding load-deflection process curve is obtained. Under concentrated load, the simulated results are in good agreement with the experimental results, and under uniform load, the simulated results are in good agreement with the results of empirical formulas. The finite element model can be used to study the performance of composite beam. The finite element model is used to study the ultimate bearing capacity and slip behavior of composite beams. Based on the analysis of load-deflection curve and load-slip curve, the characteristics of ultimate bearing capacity, stiffness and slip performance of three kinds of shear connection composite beams are studied. On this basis, the parameter analysis of composite beam is carried out, and the influence of the change of concrete strength grade, steel beam strength and section size on ultimate bearing capacity, stiffness and slip performance of composite beam is studied. The effects of these parameters on the performance of composite beams are studied.
【學位授予單位】：石家莊鐵道大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：TU398.9

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