摘要
以下承式铁路钢桁梁为研究对象,采用理论分析与现场试验相结合的方法,对重载列车作用下64 m单线简支、64 m双线简支和64 m双线连续下承式钢桁梁各杆件的力学特性进行分析。得知,中-活载作用下双线简支下承式钢桁梁重车侧结构杆件挠度和应力最大,单线简支下承式钢桁梁次之,双线连续下承式钢桁梁最小;运营重载列车作用下双线连续下承式钢桁梁横向振幅和横向加速度最小,双线简支下承式钢桁梁桥次之,单线简支下承式钢桁梁桥最大。
This paper takes the railway through steel truss bridge as the object of research.Adopting the method of combining theoretical analysis with field test, the member’s mechanical properties of three kinds of structure are analyzed under the heavy haul train.The three kinds of structure are as follows: the simply-suppor-ted beam bridge of the 64 m single, double line railway and three-span continuous beam bridge of the 64 m double line railway.The conclusions of this analysis are as follows.Firstly, the deflection and stress of these three kinds of structure member are totally different.The truck side of simply-supported bridge of double line railway has the maximum deflection and stress, the continuous bridge of double line railway has the minimum de-flection and stress.Secondly, the transverse and lateral acceleration of these three kinds of structure member are different under the operating of heavy haul train.The continuous beam bridge of double line railway has the min-imum transverse and lateral acceleration.The simply-supported bridge of single line railway has the maximum transverse and lateral acceleration.
出处
《石家庄铁道大学学报（自然科学版）》
2015年第1期45-49,53,共6页
Journal of Shijiazhuang Tiedao University(Natural Science Edition)
关键词
下承式钢桁梁
挠度
应力增量
动力响应
heavy load railway
steel truss bridge
mechanical behavior
