预应力混凝土铁路枕木失效的试验与数值分析

Experimental and Numerical Analyses of the Failure of Prestressed Concrete Railway Sleepers.

作者信息

Silva Ramon, Silva Welington V, Farias Jonas Yamashita de, Santos Marcos Aires A, Neiva Leonardo O

机构信息

Department of Civil and Environmental Engineering, SG-12 Building, Darcy Ribeiro Campus, University of Brasilia, Brasilia 70910-900, Brazil.

出版信息

Materials (Basel). 2020 Apr 5;13(7):1704. doi: 10.3390/ma13071704.

DOI:10.3390/ma13071704

PMID:32260558

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7178703/

Abstract

This paper carries out the assessment of load-carrying capacity of prestressed concrete sleepers, in accordance with Brazilian Standard (ABNT NBR 11709) and AREMA Standard. In a lot of railways around the world, many prestressed concrete sleepers have failed due to Rail Seat Abrasion (RSA) and corrosion. RSA is the wear degradation underneath the rail on the surface of prestressed concrete sleepers. In this paper, a numerical study was carried out to evaluate the load-carrying capacity of the prestressed concrete sleepers, using ABAQUS software. The nonlinear using Concrete Damage Plasticity model was validated by 18 experimental results, in accordance to standards. Using the validated model, the influence of different wear depth RSA, combined with corrosion of the prestressed wires, is investigated.

摘要

本文依据巴西标准（ABNT NBR 11709）和美国铁路工程协会（AREMA）标准，对预应力混凝土轨枕的承载能力进行评估。在世界上许多铁路中，许多预应力混凝土轨枕因轨座磨损（RSA）和腐蚀而失效。轨座磨损是指预应力混凝土轨枕表面钢轨下方的磨损退化。本文利用ABAQUS软件开展了一项数值研究，以评估预应力混凝土轨枕的承载能力。根据标准，采用混凝土损伤塑性模型的非线性分析通过18个实验结果得到验证。利用验证后的模型，研究了不同磨损深度的轨座磨损与预应力钢丝腐蚀共同作用的影响。