薄壁框架节点中的翘曲扭转传递:运动、建模及结构响应

在梁的有限元分析中,采用简化运动模型模拟翘曲扭转约束及其在框架节点中的传递。简要说明薄壁杆件的扭转性能,建立运动模型,模拟翘曲扭转在2个以上U型或I型杆件交汇的框架节点中的传递。为了说明本模型的应用及有效性,列出数值结果,并进行讨论。将梁元与壳元的有限元结果进行对比,验证了本模型可考虑节点的翘曲扭转性能。

Torsion Warping Transmission at Thin-Walled Frame Joints:Kinematics,Modelling and Structural Response

This paper reports on the use of simple kinematic models to simulate the torsion warping restraint and transmission at thin-walled frame joints in the context of beam finite element structural analysis.After reviewing the main concepts involved in the torsional behaviour of thin-walled members,the paper addresses the development of kinematic models aimed at simulating the torsion warping transmission at frame joints connecting two or more non-aligned plain channel(U-section) or I-section members.Finally,numerical results are presented and discussed,in order to illustrate the application and show the capabilities of the above kinematic models,which make it possible to use beam finite element models accounting for the joint torsion warping behaviour.For validation purposes,the beam finite element results obtained are compared with values yielded by rigorous shell finite element analyses.