无横撑系杆拱桥弹性屈曲稳定及其参数优选  

Elastic Buckling and Parametric Study of Tied-arch Bridges without Transverse Braces

作　　者：刘钊[1] 

机构地区：[1]东南大学土木工程学院,江苏南京210096

出　　处：《现代交通技术》2008年第4期16-19,共4页Modern Transportation Technology

基　　金：江苏省自然科学基金(BK2002061)

摘　　要：在无横撑系杆拱桥设计中,拱肋的侧向稳定是控制设计的因素之一。以无横撑系杆拱桥弹性稳定承载力的解析表达式为基础,探讨了结构参数变化对面内、面外稳定承载力的影响;在设定无横撑系杆拱桥的面内、面外稳定承载力相等的原则下,研究了无横撑系杆拱桥的参数优选,并给出了基于稳定性的概念设计讨论。Lateral stability is one of the controlling factors in designing the tied-arch bridges without transverse braces.In light of the analytical expressions for elastic buckling load of tied-arch bridges without transverse braces, structural parametric influence on the in-plane and out-of-plane stability of tied-arch bridges is investigated.Furthermore, under the condition of equalizing the in-plane and the out-of-plane stability capacity, the optimum structural parametric choice are studied.Conceptural design of the tied-arch bridges aiming at improving stability are also discussed.

关 键 词：桥梁工程 系杆拱桥 屈曲稳定 非保向力 参数优选 

分 类 号：U448.22[建筑科学—桥梁与隧道工程]