摘要
分别采用弹性分析方法、几何非线性分析方法及双重非线性(几何非线性和材料非线性)3种不同分析方法对2种不同结构的桁架拱桥进行极限承载力分析。通过比较3种方法的分析结果,研究非线性对于分析结果的影响。采用考虑双重非线性的分析方法针,借助有限元分析不同横向初始偏位、各种荷载工况下的结构极限承载力。研究结果表明:有侧偏钢筋混凝土桁架拱桥材料非线性和弹塑性效应比较明显,应以双重非线性分析方法进行极限承载力分析计算;结构的极限承载力随着结构横向侧偏量增加而减小;结构形式细部调整对于此类拱桥的极限承载力影响不大。
Two kinds of trussed multi-arch bridges with different structural forms were contrasted and analyzed by elastics analysis method, geometric nonlinearity analysis method and dual nonlinearity analysis method （geometric nonlinearity and material nonlinearity） respectively, and the nonlinear influence on the analysis result of RC trussed multi-arch bridges was studied. Based on dual nonlinearity analysis means, the ultimate load bearing capacities of the structure under different original transverse deviations, different load forms were anzlyzed with help of FEM. The analysis result shows that （ 1 ） material nonlinear effect and elasco-plastic effect of the RC trussed multi-arch bridges with transverse deviation is obvious whose ultimate load bearing capacity shold be analyzed bydual nonlinearity analysis method; （2） the ultimate load carrying capacity decreases with the increase of original transverse deviation and it is not infected greatly by the exiguous alternation of structural forms.
出处
《公路交通科技》
CAS
CSCD
北大核心
2009年第7期90-94,共5页
Journal of Highway and Transportation Research and Development
基金
交通部西部交通建设科技资助项目(200731881232)
关键词
桥梁工程
桁架拱桥
极限承载力
几何非线性
材料非线性
横向偏位
bridge engineering
trussed arch bridge
ultimate load bearing capacity
geometric nonlinearity
material nonlinearity
transverse deviation
