摘要
用有限元通用程序进行稳定分析给出的是一个综合性的计算结果,探讨近似计算方法是很有必要的。本文用能量法推导了在竖向均布荷载作用下,分别考虑保向力、非保向力、横向静风荷载时抛物线拱肋的稳定系数的理论计算公式,并应用于某工程实例,计算结果与ANSYS计算结果的相对误差分别为3.4%、2.1%、3.8%。此公式既简便又符合实际情况,可作为设计人员对软件计算结果的验证。
The finite element analysis of stability can merely provide a comprehensive result, it is necessary to study approximate computation methods. The theoretical formulas are derived by energy methods for out-of-plain stability coeffcients of parabola arch under the vertical average load, through considering the effects of directional loads, non-directional loads and transverse static wind loads, respectively. Our results have been applied to an actual project, results show that the relative error is respectively 3.4%, 2.1%, 3.8% when compared to ANSYS. Our formulas are simple and practical, it can be used as a consult with soft for designers.
出处
《工程数学学报》
CSCD
北大核心
2010年第3期496-502,共7页
Chinese Journal of Engineering Mathematics
基金
国家自然科学基金(50478051
50708035)~~
关键词
拱桥
竖向均布荷载
能量法
稳定系数
arch bridge
vertical average load
energy methods
stability coeffcient
