拱结构平面外稳定系数的实用计算方法  

Practical Computation Method for Out-of-plain Stability Coeffcients of Arch Structures

作　　者：谭红霞[1,2] 陈政清[1] 封周权[1] 

机构地区：[1]湖南大学风工程试验研究中心,长沙410082 [2]湘潭大学土木工程与力学学院,湘潭411105

出　　处：《工程数学学报》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)~~

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.

关 键 词：拱桥 竖向均布荷载 能量法 稳定系数 

分 类 号：U443.3[建筑科学—桥梁与隧道工程]