基于有限元的钢筋混凝土刚架拱桥极限承载力研究

 

 

(西安公路研究院,陕西 西安  710065

  :钢筋混凝土刚架拱桥属于轻型结构,既有传统拱桥的特色,又有现代桥梁的时代气息。为了明确钢筋混凝土刚架拱桥结构的超载能力以及安全储备,研究该桥型在改进前后极限承载力的提高程度,以某市一座改进型钢筋混凝土刚架拱桥新建工程为背景,分别对改进设计和定型设计建立有限元模型,并以此为基础,采用双重非线性方法对其进行极限承载能力研究。

关键词:桥梁工程;刚架拱;极限承载力

中国分类号:U445              文献标识码:A

Study on Ultimate Bearing Capacity of Reinforced Concrete Rigid Frame Arch Bridge Based on Finite Element

ZHANG Tao

(Xi’an Highway Research InstituteXi’an 710065, China)

Abstract:The rigid-frame concrete arch bridge which is a light structure includes the characteristics of the traditional arch bridge as well as the modern characteristics of the current bridges.In order to clarify the overload capacity and safety reserve of the reinforced concrete rigid frame arch bridge structure,the increase of the limit bearing capacity of the bridge type before and after the improvement was studied.Based on the new construction project of an improved reinforced concrete rigid frame arch bridge in a certain city,The finite element model of the improved design and the finite element model of the stereotyped design are established respectively,and based on this,the ultimate bearing capacity is studied by double nonlinear method.

Keywords:Bridge EngineeringRigid Frame ArchUltimate Bearing Capacity