箱梁与缆索承重桥梁理论2019年度研究进展

State-of-the-art review of box girder and cable-supported bridge analysis theories in 2019

以经典力学理论及有限单元法为主要研究手段,建立各类桥梁结构在各种工况下的解析(近似)解或数值解,探求各类桥梁结构的力学性能,是桥梁结构分析理论的研究范畴。近年来,随着如波形钢腹板箱梁桥、多塔斜拉桥、多塔悬索桥等新的结构形式的出现,桥梁结构分析理论中箱梁的空间分析理论及缆索承重桥梁分析理论两个传统课题取得了长足的进步。为了能够更好地适应当前桥梁建设形势,服务工程实践,回顾了相关研究,对文献内容进行分类分块报道,主要阐述了波形钢腹板箱梁理论、传统箱梁空间分析理论的拓展、多塔悬索桥中塔效应、缆索承重桥梁的极限承载力及钢UHPC桥面系的相关研究成果,并引申探讨箱梁及缆索承重桥梁理论精细化分析方法存在的不足之处,总结相关的实际工程应用情况,对后续研究提出建议。

Based on the main analysis methods including the classic mechanics and the finite element method,to establish analytical solutions and numerical solutions of various types of bridges under different situations to explore the mechanical behavior of bridge structures is the category of the bridge structure analysis theories.In recent years,with the emergence of new structural forms such as corrugated steel web box girder bridge,The space analysis theory of box girder and the analysis theory of cable-bearing bridge have made great progress.To meet the requirements of current bridge construction situations and to better serve the practical engineering,through reviewing related research,the present paper reports literatures into separate parts,and mainly expounds some focus issues including shear lag of box girders with corrugated steel webs,extension of traditional box girder spatial analysis theory,central tower effects of multi-tower suspension bridge,ultimate capacity of cable-supported bridges and steel-UHPC composite bridge deck system,and extends to explore shortages of box girder and cable-supported bridge refined analysis theories.It is summarized the engineering applications of the research theory,and corresponding suggestions are made to the future study.