Numerical analysis of long-haul structure laying on nonlinear foundation subjected to moving load

7th International Symposium Actual Problems of Computational Simulation in Civil Engineering

土木建筑工程;计算机科学

Smirnov, V.^1

National Research Moscow State University of Civil Engineering, Yaroslavskoe Shosse 26, Moscow

129337, Russia^1

关键词: Design procedure;    Different speed;    Dynamic parameters;    Elastomeric pads;    Excitation frequency;    Floating slab track;    Nonlinear elastics;    Stress strain state;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/456/1/012061/pdf
DOI  :  10.1088/1757-899X/456/1/012061

来源: IOP

【 摘 要 】

The article deals with a long structure laying on nonlinear foundation subjected to moving load. Such problems often arise due to design of an upper-track structure in railroad engineering, specifically due to design of floating slab track structures in tunnels. The design procedure aims at calculating static and dynamic parameters of a floating slab track structure, that consist of reinforced concrete track slab and a number of nonlinear-elastic elastomeric pads, that supports the track slab. In order to get detailed analysis of the floating slab track structure, the analysis is performed using FE-model in MSC Patran/Nastran software package. FE-model includes rails, railway fastenings, track slab, elastomeric pads and supports. The results of the static analysis are the deflections of the upper-track structure and stress-strain state of the floating slab. The results of the dynamic analysis include transfer-function of the floating slab and evaluation of insertion loss under excitation frequencies of moving trains over different speed.