【摘要】 以空间圆管桁架为研究对象,并考虑几何和材料非线性效应,采用数值分析方法,将桁架节点分别用铰接、刚接和相贯节点3种桁架模型进行模拟。分析结果表明,刚接节点和铰接节点的计算模型过高估计了节点的刚度,而相贯节点的计算模型由于考虑了节点域的变形能够较真实地反映节点的刚度。更多还原

【Abstract】 It is presented a calculation investigation on space round tube tr uss with method of numerical analysis,and three truss models of pin-jointed li n k elements,rigid-jointed beam elements as well as shell elements are develope d to simulate the truss.The effect of joint stiffness to truss displacement and bearing capacity are investigated considering material and geometric nonlineari ty.It is proved that models of pin-jointed link elements and rigid-jointed b ea m elements overvalue joint stiffness while shell elements model can reflect trul y due to considering joint deformation.更多还原