用夏比冲击试验法研究钢桥材料在维护阶段一年腐蚀的影响

Fauzri Fahimuddin, Mudiono Kasmuri, Rikki Sofyan, S. Junaidi, Latha Ms
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引用次数: 0

摘要

钢桥的腐蚀是一个主要问题,因为它有可能降低结构在其使用寿命期间的性能。不应该降低的一个因素是断裂韧性,因此这应该是维护计划中非常重要的问题。现有的指南没有规定腐蚀条件何时是危险的,何时腐蚀条件对结构性能无害。这项研究旨在解释腐蚀多长时间不会造成危险,以及腐蚀何时变得危险。在本研究中使用了Charpy冲击试验来检查腐蚀对断裂韧性的影响,腐蚀持续时间为每周至一年。本研究项目的一系列试验采用了桥梁结构常用钢板sm -490型试件。腐蚀持续时间变化的试样被浸泡在硫酸溶液中以模拟腐蚀的增长,然后进行裂纹韧性测试。对每个试样的韧性进行测试,腐蚀周期从1周开始,以此类推至1年,以确定断裂韧性的水平。所有试验的结果表明,腐蚀试样的韧性在长达1年的时间内没有下降。本研究提供的数据有助于设计人员和维护人员在评估受腐蚀影响的钢桥结构完整性时,更清晰、更准确地考虑腐蚀处理方案。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effect of one-year corrosion on steel bridge materials in the maintenance stage with the Charpy impact test method
Corrosion of steel bridges is a major problem because it has the potential to reduce the performance of the structure over its lifetime. One factor that should not be reduced is fracture toughness, so this should be a very important concern in the maintenance program. Existing guidelines do not specify when corrosion conditions are hazardous and when corrosion conditions are not hazardous to structural performance. This study aims to explain how long corrosion does not cause danger, and when corrosion becomes dangerous. The Charpy Impact Test was used in this study to examine the effect of corrosion with a corrosion duration of weekly up to one year on fracture toughness. The series of tests in this research program used SM-490-type specimens which are steel plates commonly used for bridge structures. Specimens with variations in corrosion duration which were the result of immersion in sulfuric acid solution to simulate corrosion growth were then subjected to crack toughness testing. The toughness of each specimen was tested with a corrosion period starting from 1 week and so on up to 1 year to determine the level of fracture toughness. The results obtained from all tests showed that there was no decrease in the toughness of the corroded specimens for up to 1 year. The data presented in this study is very helpful for the designers and maintainers to plan corrosion treatment programs with clearer and more accurate considerations in assessing the structural integrity of steel bridges affected by corrosion.
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