本文關(guān)鍵詞： 組合梁 抗彎性能 U型鋼 試驗(yàn)研究 有限元分析　出處：《哈爾濱工業(yè)大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：外包U型鋼—混凝土組合梁是在普通組合梁的基礎(chǔ)上發(fā)展起來的一種更具優(yōu)勢的組合構(gòu)件。這種組合梁采用U型截面鋼作為鋼構(gòu)件，U型鋼可以軋制，也可以采用鋼板或型鋼焊接而成，在U型鋼內(nèi)設(shè)置抗剪連接件，并在U型鋼內(nèi)澆筑混凝土，通過抗剪連接件使鋼構(gòu)件和混凝土共同工作。這種組合梁具有承載力高、抗火性能好、延性好、施工方便等優(yōu)點(diǎn)，是一種具有良好應(yīng)用前景的新型組合構(gòu)件。本文對(duì)外包U型鋼—混凝土組合梁的抗彎性能進(jìn)行了系統(tǒng)研究，主要完成了以下工作： (1)完成了6根足尺外包U型鋼—混凝土組合梁受彎性能試驗(yàn)，研究抗剪連接件數(shù)量、截面尺寸、混凝土翼緣板寬度等參數(shù)對(duì)組合梁抗彎性能的影響。通過分析試驗(yàn)現(xiàn)象、荷載—撓度曲線、荷載—應(yīng)變曲線、不同荷載級(jí)別下應(yīng)變沿截面高度變化規(guī)律與撓曲線來研究這種組合梁的抗彎性能。 (2)采用通用有限元軟件ABAQUS對(duì)外包U型鋼—混凝土組合梁的受彎性能進(jìn)行模擬，，并將模擬結(jié)果與試驗(yàn)結(jié)果進(jìn)行對(duì)比來驗(yàn)證有限元模型的正確性。然后進(jìn)行了典型組合梁構(gòu)件分析，研究這種截面形式組合梁的受彎工作機(jī)理。最后分析了鋼板殘余應(yīng)力、材料強(qiáng)度、組合梁截面尺寸和鋼板厚度對(duì)抗彎承載力的影響。 (3)基于截面全塑性假設(shè)推導(dǎo)了外包U型鋼—混凝土組合梁抗彎承載力計(jì)算方法，給出了完全抗剪連接與部分抗剪連接組合梁抗彎承載力計(jì)算公式，并用試驗(yàn)結(jié)果驗(yàn)證了公式的合理性。采用折減剛度法推導(dǎo)了組合梁撓度計(jì)算公式。
[Abstract]:The overlaid U-shaped steel-concrete composite beam is a kind of more advantageous composite member developed on the basis of ordinary composite beam. This composite beam can be rolled by using U-section steel as steel member. It can also be made of steel plates or sections of steel, with shear-resistant connectors in the U-section steel, and concrete in the U-section steel. Through the shear connectors, the steel members and the concrete can work together. This composite beam has high bearing capacity. Because of its good fire resistance, good ductility and convenient construction, it is a new type of composite member with good application prospect. In this paper, the flexural behavior of U-shaped steel reinforced concrete composite beam is studied systematically, and the following work is accomplished:. In this paper, the flexural behavior tests of 6 full scale steel reinforced concrete composite beams are carried out. The effects of the number of shear joints, the size of section and the width of concrete flange slab on the flexural behavior of composite beams are studied. The flexural behavior of this composite beam is studied by means of load-deflection curve, load-strain curve, strain variation law and deflection curve along the cross-section height under different load levels. (2) the bending behavior of U-shaped steel reinforced concrete composite beams is simulated by using the universal finite element software ABAQUS, and the simulation results are compared with the experimental results to verify the correctness of the finite element model, and then the typical composite beam members are analyzed. The bending mechanism of this composite beam is studied. Finally, the influence of steel plate residual stress, material strength, cross section size and thickness of composite beam on the flexural bearing capacity is analyzed. 3) based on the assumption of full plasticity of section, the calculation method of flexural bearing capacity of steel reinforced concrete composite beams is derived, and the formula of flexural bearing capacity of composite beams with complete shear connection and partial shear connection is given. The rationality of the formula is verified by the experimental results, and the formula for calculating the deflection of composite beam is derived by the method of reduced stiffness.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TU398.9

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本文編號(hào)：1545026