应用能量变分法计算下承式系杆拱侧倾临界荷载  

Calculation with Energy Variation Method for Critical Load of Side Inclination of Through Tied Arch Bridge

作　　者：张显军[1] 陶红艳[1] 

机构地区：[1]东北林业大学

出　　处：《森林工程》2006年第3期27-28,62,共3页Forest Engineering

摘　　要：为满足使用功能及美观上的需要,无推力下承式系杆拱通常被设计成少横撑和无横撑,此时就必须验算其横向稳定性。而目前有限元通用程序给出的是一个综合性的计算结果,设计者无法具体分析各项几何及材料参数的影响程度,从而不可能通过变更设计或采取有针对性的措施来提高稳定系数。因此,探讨解析解或各种近似的计算方法还是很有必要的。本文以无横撑下承式系杆拱桥侧倾稳定问题为背景,用能量变分方法导出了其侧倾临界荷载的近似解析解。In order to accord with requirements of usage performance and esthetic aspects, non-pushing through bowstring arch is usually designed into the structure with transverse non-range-spacer or few non-range-spacer. Accordingly, the transverse stability must be calculated. However, finite element analysis can merely provide a comprehensive result at present, therefore designers cannot analyze systemically the influence on each geometrical and material parameter so that they fail to enhance stability coefficient by taking effective measures or variation of design. Thus, it is necessary to research all approximate computation methods. This paper aims at side inclination stability of through bowstring arch non-range-spacer, and derives the analytical approximations of its critical load of side inclination stability by using energy variation approach.

关 键 词：无横撑 下承式系杆拱 侧倾稳定 临界荷载 能量变分 

分 类 号：U443[建筑科学—桥梁与隧道工程]