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.
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.
出处
《同济大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2004年第4期436-440,共5页
Journal of Tongji University:Natural Science
关键词
钢-混凝土组合梁
滑移
剪力滞后
剪切变形
梁单元
steel-concrete composite beam
slip
shear lag
shear deformation
beam element
