本文選題：三維整體框架　切入點(diǎn)：組合梁簡(jiǎn)化模型　出處：《青島理工大學(xué)》2013年碩士論文　論文類型：學(xué)位論文

【摘要】：鋼-混凝土組合梁是用抗剪連接件把混凝土樓板和鋼梁連接在一起共同承受外力的結(jié)構(gòu)形式。其可以抵抗板梁交界面處的掀起及相對(duì)滑移，與無(wú)抗剪連接的鋼梁相比，具有可以減小用鋼量，增大剛度、穩(wěn)定性和整體性等優(yōu)點(diǎn)。它可以充分發(fā)揮混凝土的抗壓性能和鋼材的抗拉性能，是具有很大的發(fā)展空間的結(jié)構(gòu)形式之一，具有良好的發(fā)展前景。近年，主流的組合梁計(jì)算模型是鋼梁上翼緣加有一定寬度樓板的形式構(gòu)成的，研究方法既有理論推導(dǎo)又有試驗(yàn)研究。利用已有試驗(yàn)，通過(guò)對(duì)組合梁截面的合理簡(jiǎn)化有效模擬抗剪件的連接程度，基于簡(jiǎn)化模型建立組合梁框架整體模型進(jìn)行有限元分析，將大大降低建模和整體分析難度。本研究旨在提出新的組合梁簡(jiǎn)化模型，以便為組合梁的研究與設(shè)計(jì)提供合理的依據(jù)，具有理論意義和應(yīng)用價(jià)值。主要研究?jī)?nèi)容如下： （1）為了構(gòu)成簡(jiǎn)化模型的雛形，首先分析既往研究成果中的折減剛度、有效寬度以及等效截面等計(jì)算方法，提出有望較好反映組合梁截面剛度和抗彎強(qiáng)度的簡(jiǎn)化計(jì)算設(shè)想，，以便用于三維鋼框架有限元分析。 （2）參照已有試驗(yàn)，利用ABAQUS平臺(tái)創(chuàng)建鋼框架模型，為了驗(yàn)證有限元模型的準(zhǔn)確性，采用理論計(jì)算方法算得無(wú)樓板時(shí)框架梁在均布荷載作用下的跨中應(yīng)力和撓度，并與有限元分析結(jié)果對(duì)比。在此基礎(chǔ)上，進(jìn)一步分析三維整體框架中的鋼梁在均布荷載作用下的應(yīng)力、應(yīng)變、撓度和側(cè)向位移。 （3）采用簡(jiǎn)化模型進(jìn)行整體框架受力性能分析，通過(guò)與試驗(yàn)對(duì)比驗(yàn)證簡(jiǎn)化模型的合理性和有效性，討論等效鋼板的厚度與混凝土樓板和鋼梁的抗剪連接程度的關(guān)系，分析板厚度和梁跨度變化時(shí)對(duì)框架梁受力性能的影響。
[Abstract]:Steel concrete composite beam is the concrete slabs and steel beams connected together to form the connection structure under external force. The anti shear resistance of plate beam can be lifted at the interface and the relative slip and shear connection steel compared, can reduce the amount of steel, increase the stiffness, stability and overall advantages etc. it can give full play to the tensile properties of concrete and compressive strength of steel, is one of the structure has very large development space, has good prospects for development. In recent years, the mainstream of the calculation model of composite beam is composed of the upper flange of the steel beam with a certain width of the slab form, both theory and research methods experimental study. By using the existing test, effectively simulate the degree of shear connection pieces by rational simplification of composite beams, simplified model of composite beam frame model based on finite element analysis, The difficulty of modeling and overall analysis will be greatly reduced. The purpose of this study is to propose a new simplified model of composite beams, so as to provide a reasonable basis for the research and design of composite beams, which has theoretical significance and application value.
(1) to a simplified model of the prototype, the first analysis of the previous research results in reduced stiffness, effective width and equivalent cross section calculation method proposed is expected to reflect the simplified stiffness and flexural strength of composite beams is calculated for vision, 3D steel frame finite element analysis.
(2) according to the existing test, create a steel frame model with ABAQUS platform, in order to verify the accuracy of finite element model, the theoretical calculation method is no floor frame beams under uniform load. The mid span deflection and stress, and compared with the results of finite element analysis. On this basis, further analysis of the framework of three-dimensional the steel beam under uniform load. The stress, strain, deflection and lateral displacement.
(3) the performance analysis framework of the simplified mechanical model, and through the comparison and verification of the rationality and validity of the simplified model, discuss the degree of shear connection between the equivalent thickness of the steel plate and the concrete slab and steel beam, impact on the performance of frame beams of plate thickness and beam span variations.

【學(xué)位授予單位】：青島理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：TU398.9

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本文編號(hào)：1649916