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考虑滑移、剪力滞后和剪切变形的组合梁单元
引用本文:孙飞飞,李国强.考虑滑移、剪力滞后和剪切变形的组合梁单元[J].同济大学学报(自然科学版),2004,32(4):436-440.
作者姓名:孙飞飞  李国强
作者单位:同济大学,建筑工程系,上海,200092
摘    要:通过简单的运动学假设,提出了考虑滑移、剪力滞后和剪切变形的钢-混凝土组合梁位移法单元.由于组合梁存在多种变形的耦合作用,低次单元16DOF(自由度)应力精度较低,而具有5次Hermite多项式形函数的高次单元26DOF能以较少的单元数达到满意的精度.算例分析表明,忽略钢梁的剪切变形可能会导致显著的误差.

关 键 词:钢-混凝土组合梁  滑移  剪力滞后  剪切变形  梁单元
文章编号:0253-374X(2004)04-0436-05

Beam Formulation for Composite Beams with Slip,Shear Lag and Shear Deformation
SUN Fei-fei,LI Guo-qiang.Beam Formulation for Composite Beams with Slip,Shear Lag and Shear Deformation[J].Journal of Tongji University(Natural Science),2004,32(4):436-440.
Authors:SUN Fei-fei  LI Guo-qiang
Abstract:By means of simple kinematic assumptions,a displacement-based beam formulation is proposed for steel-concrete composite beams with slip,shear lag and shear deformation.Because of deformation couplings,the stress accuracy of a low order element 16DOF is rather low.Therefore,a 5th order Hermite polynomial shape function is applied to construct a high order element 26DOF,achieving satisfactory results of stresses with a coarse mesh.Numerical examples show that significant errors can result from neglecting the shear deformation of the steel beam.
Keywords:steel-concrete composite beam  slip  shear lag  shear deformation  beam element
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