發(fā)布時間：2018-07-10 16:14

  本文選題：T形鋼管混凝土柱 + 抗震性能�。� 參考：《武漢理工大學(xué)》2013年碩士論文

【摘要】：異形鋼管混凝土柱不僅具有普通鋼管混凝土柱的優(yōu)越性能,而且擁有自身的優(yōu)點,能夠更好地滿足建筑的平面布置要求和建筑使用功能,其在未來的建筑結(jié)構(gòu)中的發(fā)展前景必將越來越廣闊。本文基于黃俊博士對異形鋼管混凝土組合柱試驗研究及抗震性能研究課題的基礎(chǔ)上進行深化研究,主要采用ABAQUS對T形截面異形鋼管混凝土柱的抗震性能進行了有限元模擬分析,主要研究內(nèi)容和研究成果如下： (1)T形鋼管混凝土柱有限元模型建立：利用有限元分析軟件ABAQUS建立T形鋼管混凝土柱有限元模型,其中,鋼管與混凝土的界面模型均采用不考慮粘結(jié)滑移方式來模擬。 (2)T形鋼管混凝土柱抗震性能有限元分析：有限元計算所得的荷載—位移滯回曲線形狀均很飽滿,沒有出現(xiàn)捏縮現(xiàn)象,滯回性能良好,說明T形鋼管混凝土柱的延性和耗能性能都很好；T形鋼管混凝土柱位移延性系數(shù)均大于2,說明T形鋼管混凝土柱的延性性能優(yōu)于普通混凝土構(gòu)件；T形鋼管混凝土柱的等效粘滯阻尼系數(shù)h。均大于0.3,說明T形鋼管混凝土柱的耗能能力優(yōu)于普通鋼筋混凝土結(jié)構(gòu)和型鋼混凝土結(jié)構(gòu)；T形鋼管混凝土柱的剛度退化曲線基本上呈現(xiàn)標準正態(tài)分布,隨著位移的不斷增加,鋼管對核心混凝土產(chǎn)生套箍作用,T形鋼管混凝土柱的剛度退化趨勢明顯變慢,表明T形鋼管混凝土柱本身具有較強的抗側(cè)移能力。 (3)T形鋼管混凝土柱有限元計算結(jié)果正交分析：采用正交分析法對T形鋼管混凝土柱有限元計算結(jié)果進行分析,主要考察肢高厚比、鋼管厚度、鋼管強度等級、混凝土強度等級、軸壓比、荷載角和柱長度7個因素對T形鋼管混凝土柱的極限承載力、延性系數(shù)和等效粘滯阻尼系數(shù)的影響,得到了各因素對構(gòu)件極限承載力、延性和耗能性能影響的顯著程度：肢高比對T形鋼管混凝土柱極限承載力影響最大；混凝土強度等級對T形鋼管混凝土柱延性系數(shù)影響最大；鋼管強度等級對T形鋼管混凝土柱等效粘滯阻尼系數(shù)影響最大。 (4)T形鋼管混凝土柱骨架曲線模型探討：通過對有限元計算結(jié)果進行回歸分析,提出了T形鋼管混凝土柱荷載-位移骨架曲線模型,充分考慮了軸壓比、套箍系數(shù)、長細比對骨架曲線的影響推導(dǎo)了模型參數(shù)(彈性階段剛度、屈服荷載、強化階段剛度)計算表達式,并引入修正系數(shù)η對彈性階段剛度進行修正,最后將模型計算結(jié)果與有限元計算結(jié)果進行了對比：彈性階段剛度有限元計算值偏大,經(jīng)修正誤差控制在一定范圍內(nèi)；軸壓比、套箍系數(shù)、長細比對屈服荷載和強化階段剛度影響較大；模型計算結(jié)果與有限元計算結(jié)果吻合較好,該模型參數(shù)計算表達式具有一定的計算精度和應(yīng)用價值,可為后續(xù)研究提供參考。
[Abstract]:The special-shaped concrete-filled steel tubular column not only has the superior performance of the ordinary concrete-filled steel tubular column, but also has its own advantages, which can better meet the requirements of the plane layout of the building and the function of the building. Its development prospect in the future construction structure will be more and more broad. Based on Dr. Huang Jun's research on the experimental research and seismic behavior of concrete-filled steel tubular columns, Abaqus is used to simulate the seismic behavior of concrete-filled steel tubular columns with T-shaped section by finite element method. The main research contents and results are as follows: (1) the finite element model of T-shaped concrete-filled steel tubular column is established by using finite element analysis software Abaqus. The interface model of steel tube and concrete is simulated without considering the bond-slip mode. (2) finite element analysis of seismic behavior of T-shaped concrete-filled steel tubular column: the load-displacement hysteretic curve obtained by finite element analysis is very full. There is no pinch phenomenon, and the hysteretic performance is good, which indicates that the ductility and energy dissipation performance of T-shaped CFST columns are very good. The displacement ductility coefficient of T-shaped concrete-filled steel tubular columns is more than 2, which indicates that the ductility of T-shaped concrete-filled steel tubular columns is better than that of ordinary concrete members. The results show that the energy dissipation capacity of T-shaped concrete-filled steel tubular columns is better than that of ordinary reinforced concrete structures and steel reinforced concrete structures. The stiffness degradation curves of T-shaped concrete-filled steel tubular columns basically show a standard normal distribution, and with the increasing of displacement, the stiffness degradation curves of T-shaped concrete-filled steel tubular columns show a standard normal distribution. The stiffness degradation trend of T-shaped concrete-filled steel tube columns is obviously slower than that of T-shaped concrete filled steel tube columns. The results show that T-shaped concrete-filled steel tubular columns have strong ability to resist lateral displacement. (3) the results of finite element analysis of T-shaped concrete-filled steel tubular columns are analyzed by means of orthogonal analysis. The effects of seven factors, such as height ratio, steel tube thickness, steel tube strength grade, concrete strength grade, axial compression ratio, load angle and column length, on the ultimate bearing capacity, ductility coefficient and equivalent viscous damping coefficient of T-shaped CFST columns are investigated. The effects of various factors on ultimate bearing capacity, ductility and energy dissipation performance of T-shaped concrete-filled steel tubular columns are obtained: limb height ratio has the greatest influence on ultimate bearing capacity of T-shaped concrete-filled steel tubular columns, and concrete strength grade has the greatest influence on ductility coefficient of T-shaped concrete-filled steel tubular columns. The strength grade of steel tube has the greatest influence on the equivalent viscous damping coefficient of T-shaped concrete-filled steel tubular column. (4) the model of skeleton curve of T-shaped concrete-filled steel tubular column is discussed: the results of finite element analysis are analyzed by regression analysis. The load-displacement skeleton curve model of T-shaped concrete-filled steel tubular column is proposed. The influence of axial compression ratio, hoop coefficient and aspect ratio on the skeleton curve is fully considered. The model parameters (elastic stage stiffness, yield load) are derived. The stiffness of the elastic stage is modified by introducing the modified coefficient 畏. Finally, the results of the model calculation are compared with the results of the finite element method: the finite element calculation value of the stiffness in the elastic stage is larger than that of the finite element method. The corrected error is controlled within a certain range; axial compression ratio, hoop coefficient, aspect ratio have great influence on yield load and stiffness in strengthening stage, and the results of model calculation are in good agreement with the results of finite element calculation. The model parameter calculation expression has certain calculation precision and application value, and can provide reference for further research.
【學(xué)位授予單位】：武漢理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TU398.9;TU352.11

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本文編號：2113917