本文選題：高強(qiáng)鋼組合 + K型偏心支撐鋼框架　； 參考：《西安建筑科技大學(xué)》2013年碩士論文

【摘要】：高強(qiáng)鋼組合偏心支撐鋼框架體系是一種高效的抗震鋼結(jié)構(gòu)體系，其耗能梁段采用強(qiáng)度較低、變形能力較強(qiáng)的鋼材(如Q235或Q345)，保證結(jié)構(gòu)在強(qiáng)烈地震下有良好的塑性變形和耗能能力，，其他構(gòu)件采用高強(qiáng)度鋼材(如Q420、Q460或Q690等)以節(jié)約材料從而降低造價(jià)，該體系綜合了高強(qiáng)鋼承載能力高和偏心支撐鋼框架抗震性能好的優(yōu)點(diǎn)，但是目前國(guó)內(nèi)外對(duì)這種結(jié)構(gòu)形式抗震性能的研究非常匱乏。 本文在充分參考這兩個(gè)領(lǐng)域研究成果的基礎(chǔ)上，采用ABAQUS建立有限元模型，選擇C3D8R實(shí)體單元，綜合運(yùn)用結(jié)構(gòu)及掃掠網(wǎng)格劃分技術(shù)，利用隨動(dòng)強(qiáng)化本構(gòu)模型，充分考慮材料與幾何非線(xiàn)性，用結(jié)合Newton-Raphson迭代法及增量法的ABAQUS隱式求解器，模擬了結(jié)構(gòu)在循環(huán)荷載作用下的受力性能，并結(jié)合剪切型和彎曲型高強(qiáng)鋼組合單層單跨K型偏心支撐鋼框架單調(diào)加載和循環(huán)加載試驗(yàn)所得的數(shù)據(jù)，驗(yàn)證了ABAQUS有限元軟件建模模擬分析的正確性和有效性。 通過(guò)對(duì)五組影響結(jié)構(gòu)性能的參數(shù)模型的計(jì)算與分析，包括不同材料組合、耗能梁段長(zhǎng)度、耗能梁段腹板厚度、高跨比及加勁肋間距的變化，給出了結(jié)構(gòu)荷載位移曲線(xiàn)、滯回曲線(xiàn)、骨架曲線(xiàn)、剛度位移關(guān)系曲線(xiàn)及部分應(yīng)力云圖和變形圖，分析了極限承載力、剛度、延性、耗能性能的變化規(guī)律，闡述了剪切型高強(qiáng)鋼組合K型偏心支撐鋼框架與彎曲屈服型框架破壞模式的差異。最后，根據(jù)有限元分析結(jié)果，得出相關(guān)結(jié)論并給出設(shè)計(jì)建議，可供工程設(shè)計(jì)參考。
[Abstract]:High strength steel composite eccentrically braced steel frame system is an efficient aseismic steel structure system, and its energy dissipation beam section is of low strength. Steel with strong deformation capacity (such as Q235 or Q345C) ensures that the structure has good plastic deformation and energy dissipation capacity under strong earthquakes, and other members use high strength steel (such as Q420, Q460, Q690, etc.) to save materials and thus reduce the cost. The system combines the advantages of high strength steel bearing capacity and good seismic performance of eccentrically braced steel frame, but the research on seismic behavior of this kind of structure is very scarce at home and abroad. On the basis of fully referring to the research results in these two fields, the finite element model is established by using ABAQUS, the C3D8R entity element is selected, the structure and swept mesh generation technique is used synthetically, and the following enhanced constitutive model is used. Considering the material and geometric nonlinearity, a ABAQUS implicit solver combined with Newton-Raphson iterative method and incremental method is used to simulate the behavior of the structure under cyclic load. The validity and validity of the modeling and simulation analysis of ABAQUS finite element software are verified by combining the data obtained from monotonic loading and cyclic loading tests of single monolayer single span eccentric braced steel frame with shear and bending high strength steel. Through the calculation and analysis of five groups of parameter models which affect the performance of the structure, including the changes of different material combinations, the length of the energy dissipation beam, the thickness of the web of the energy dissipation beam, the ratio of height to span and the distance between stiffened ribs, the load-displacement curve of the structure is given. The hysteretic curve, skeleton curve, stiffness displacement relation curve, partial stress cloud diagram and deformation diagram are analyzed, and the variation rules of ultimate bearing capacity, stiffness, ductility and energy dissipation performance are analyzed. The difference of failure modes between shear type high strength steel composite K type eccentrically braced steel frame and bending yield type frame is expounded. Finally, according to the results of finite element analysis, the relevant conclusions and design suggestions are given, which can be used as a reference for engineering design.
【學(xué)位授予單位】：西安建筑科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類(lèi)號(hào)】：TU391

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本文編號(hào)：1902584