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

机译:预应力混凝土铁路枕木破坏的试验与数值分析

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摘要

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.
机译:本文根据巴西标准(ABNT NBR 11709)和AREMA标准,对预应力混凝土轨枕的承载能力进行了评估。在世界各地的许多铁路中,许多预应力混凝土轨枕由于轨道座磨损(RSA)和腐蚀而失效。 RSA是预应力混凝土轨枕表面导轨下方的磨损退化。本文利用ABAQUS软件进行了数值研究,以评估预应力混凝土轨枕的承载能力。根据标准,通过18个实验结果验证了使用混凝土损伤可塑性模型的非线性。使用经过验证的模型,研究了不同磨损深度RSA的影响以及预应力钢丝的腐蚀。

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