摘要
通过与文献中试验结果的比较,验证了可以采用ANSYS软件中的Beam189梁单元模拟弹性拱的平面外屈曲,计算了四种约束条件下拱的内力和平面外屈曲荷载。结果表明,拱圆心角较小时支座约束对拱的平面外屈曲荷载影响较大,随着圆心角的增大,四种支座约束条件下拱的屈曲荷载越来越趋于一致,文章从受力的角度给予了解释。
Torsional-flexural buckling of elastic arches can be simulated by Beam189 element of ANSYS software. Internal forces and flexural-torsional buckling loads of arches were gained on four different restraint conditions. It was concluded that the effects of different restraint conditions on buckling loads of arches are apparent when subtended angle is small and different restraint conditions almost have no effects on buckling loads when subtended angle becomes large according the calculation results. The reasons were analyzed based on mechanics.
出处
《结构工程师》
2007年第6期33-36,共4页
Structural Engineers
关键词
有限元
拱
平面外屈曲
支座约束
finite element, arch, flexural-torsional buckling, restraint condition
