无砟轨道桥梁桥面板ZK活载计算图示分析

为准确模拟高速铁路桥上无砟轨道结构传递ZK活载至桥面板上的荷载分布效应,采用Abaqus软件建立CRTSⅠ型双块式无砟轨道精细化数值分析模型,通过对底座板底面垂向应力等值线分布进行分析,开展高速铁路桥梁桥面板ZK活载计算图示的研究.研究表明,进行桥梁结构横向荷载计算或桥面板、桥面铺装等桥梁结构局部精细化受力分析时,在单...

Graphic Analysis of ZK Live Load Calculation of Bridge Deck of Ballastless Track Bridge

In order to accurately simulate the load distribution effect of ZK live load transferring from ballastless track to high-speed railway bridge deck,the refined numerical analysis model of CRTSⅠ twin-block ballastless track is established by ABAQUS software,the vertical stress contour distribution on the bottom of the base is analyzed and the ZK live load calculation diagram of bridge deck of high-speed railway is studied.The research shows that,when the lateral load of bridge structure or the local fine stress of bridge deck are analyzed,under the action of uniaxial ZK special load,the calculation diagram of load transferred to bridge deck can be simplified as rectangular surface load with length of 2. 0 m along bridge direction and width of 0. 7 m in transverse direction,with uniform surface load value of 90. 80 kPa;under special live load of four axis ZK,calculation diagram can be simplified as strip surface load with transverse distribution width of0. 76 m and uniform surface load value of 109. 20 kPa.