钢桁架桥梁POD曲线及初始裂缝尺寸研究

2011 Second International Conference on Mechanic Automation and Control Engineering Pub Date : 2011-07-15 DOI:10.1109/MACE.2011.5988698

Xiangping Chen, Jinhua Tan

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引用次数: 0

摘要

摘要针对钢桁架桥梁构件疲劳裂纹尺寸测量存在的不确定性和遗漏，进行了全尺寸试验，研究了涂料、检测手段和检测工艺对疲劳裂纹检测结果的影响。给出了钢桁架桥梁缺陷检测的POD (detection probability of detection)曲线，建立了考虑POD曲线和检测偏差的初始缺陷尺寸的可靠性模型，所提供的公式可用于损伤容限法预测钢桁架桥梁剩余寿命时对初始缺陷尺寸的评估。

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A study on the POD curve and initial crack size of steel truss bridge

Abstract: Full-scale Tests of steel truss bridge components are made to study the effect of paint, the inspectors and testing process on the results of fatigue crack detection, for the uncertainty and omission existing in measured flaw size. The POD (probability of detection) curve is provided for the flaw detection in steel-truss bridges, the reliability model obtaining initial flaw size is established, which takes the POD curve and inspection deviations into account, and the formula provided can be used to evaluate the initial flaw size when predicting the residual life of steel truss bridge applying damage tolerance method.

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2011 Second International Conference on Mechanic Automation and Control Engineering

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