考虑剪切变形影响的L形柱单元刚度矩阵
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摘要
分析等肢L形截面柱的受力性能,在非惯性轴坐标系下,建立了考虑剪切变形及形心与剪切中心不重合影响下的L形截面柱单元刚度矩阵,并编写了L形截面柱框架结构内力分析的有限元程序.通过某三层框架结构算例,将所编程序的计算结果与ANSYS软件分析结果及采用异形柱刚度等效的计算结果进行了比较,得出L形柱的剪切变形与等效矩形柱的剪切变形差异较大及考虑扭转效应对L形柱的扭矩影响较大的结论.
In non-inertial coordinate system,the L-shaped columns element stiffness matrix was derived from the study of load-bearing capacity of the L-shaped columns considering shear deformation effects.Using the matrix,a finite element program of L-shaped column frame structure internal forces analysis was compiled.A 3-layer frame structure was calculated and a comparative study is made of the ANSYS calculation results and the calculation results of equivalent rectangular columns.Conclusions are drawn that shear deformation of the L-shaped column is greatly different from that of equivalent rectangular column;the torque of L-shaped column is influenced greatly whether considering the effects of reverse or not.
In non-inertial coordinate system,the L-shaped columns element stiffness matrix was derived from the study of load-bearing capacity of the L-shaped columns considering shear deformation effects.Using the matrix,a finite element program of L-shaped column frame structure internal forces analysis was compiled.A 3-layer frame structure was calculated and a comparative study is made of the ANSYS calculation results and the calculation results of equivalent rectangular columns.Conclusions are drawn that shear deformation of the L-shaped column is greatly different from that of equivalent rectangular column;the torque of L-shaped column is influenced greatly whether considering the effects of reverse or not.
引文
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[3]陈岱林.多层及高层建筑结构三维分析与设计软件用户手册[M].北京:中国建筑科学研究院,2003.CHEN Dailin.Space analysis and design software of multi-storybuildings and tall buildings[M].Beijing:China Academy ofBuilding Research,2003.
[4]王滋军.中高层钢筋混凝土异形柱框架结构试验与理论研究[J].地震工程与工程振动,2002,22(5):62.WANG Zijun.Experi mental and theoretical research on mid-highrise RCframe with special-shaped columns[J].EarthquakeEngineering and Engineering Vibration,2002,22(5):62.
[5]孙军华.异形柱抗侧移刚度的理论研究及其在框架分析中的应用[D].杭州:浙江大学土木工程学院,2003.SUNJunhua.Theory study of lateral stiffness of special-sharpedcolumn and application on analysis of frame structure[D].Hangzhou:Zhejiang University.School of Civil Engineering,2003.
[6]徐玉野.钢筋混凝土异形柱结构性能研究与展望[J].建筑技术,2006,37(2):136.XU Yuye.Performance study and prospect of reinforcedconcrete structure with special-shaped column[J].ArchitectureTechnology,2006,37(2):136.
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