摘要
应用势能驻值原理导出桁架的临界荷载计算公式,理论分析考虑了四角锥系空间桁架的剪切变形影响。大量典型实际算例的计算结果与有限元结果的误差在±5%以内,为实际工程设计中这类结构的临界荷载计算提供了一种可靠的计算方法。
Considering the influence of shear deformation on quadrangular-pyramid space truss,the computing formula for the critical load of truss was derived by the principle of stationary total potential energy.The deviation between computing results and finite element results of several real typical examples is in the range of negative five percent to positive five percent.It shows that the formula is accurate enough and suitable for this structure type in practical engineering design.
出处
《四川建筑科学研究》
北大核心
2011年第5期8-11,共4页
Sichuan Building Science
基金
国家自然科学基金资助项目(50868002)
关键词
临界荷载
四角锥系空间桁架
剪切变形
critical load
quadrangular-pyramid truss
shear deformation
