铁路桩基承台的撑杆-系杆体系及承载能力研究

Study of Strut-and-tie System and Carrying Capacity of Railway Pile Caps

为研究铁路桥梁桩基承台设计计算中所提出的"撑杆—系杆体系"的合理性及不同结构参数对承载能力的影响.以在建铁路连续梁桥的11根桩基承台为研究背景,采用ANSYS有限元分析软件进行仿真分析,并结合现场试验分析,通过有限元模拟与现场测试对比分析,研究承台在施工阶段荷载作用下的应力分布状态,探讨铁路桩基承台的传力机理及不同结构参数下的承载能力.为以后工程设计计算提供技术依据.

In order to study the proposed of strut-and-tie system and the influence of different structural parameters on the carrying capacity for the bridge of railway pile caps.In the paper choosing a continuous beam railway bridge of 1 1 pile cap,under construction,as the research background,using finite element of ANSYS software for simulation analysis,and combined with field test analysis,by comparison with the finite element simulation and field test analysis,study the stress distribution state of pile cap under the load,to discuss the bridge of railway pile cap of the transfer mechanism and carrying capacity under different structural parameters.Provide tech-nical basis for the engineering design and calculation.