Implementation of Field Strain Measurements for Fatigue Lifetime Evaluation
Implementation of Field Strain Measurements for Fatigue Lifetime Evaluation
复制标题
实施现场应变测量以评估疲劳寿命
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
David Gilmore
中科院分区：
文献类型：
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作者：
A. Huckelbridge;C. Kafali;David Gilmore
在桥梁管理系统中，需要对桥梁的剩余疲劳寿命进行准确的估计，以用于对现有桥梁的检查、维护、修理、修复和更换做出具有成本效益的决策。剩余寿命的估计也是至关重要的评估超载车辆的政策和确定的影响，允许某种类型的超载车辆使用的公路，并可用于评估立法政策，如允许卡车重量。疲劳寿命法也可用于新桥梁的设计。本研究的目的是实现一个疲劳寿命评估系统，包括硬件和软件，这可以烧毁，并随时利用，任何非研究桥梁人员。AASHTO疲劳评估标准（S-N曲线方法）用于开发一种算法，该算法根据收集的应变直方图以及通过用户界面提供的有关AASHTO详图类别、详图的前几年服务和交通增长率的其他信息，预测受监测结构详图的剩余寿命。
An accurate estimate of the remaining fatigue lifetime of a bridge is needed in bridge management systems that are used to make cost effective decisions regarding inspection, maintenance, repair, rehabilitation and replacement of existing bridges. The estimation of remaining life is also crucial for assessing permit-vehicle policy and determining the effects of permitting a certain class of overloaded vehicles to use the highways, and can be used to assess legislative policies such as permissible truck weights. The fatigue-life approach can also be applied in the design of new bridges. The objective of this research was to implement a fatigue lifetime assessment system, including both hardware and software, which could be burned over to, and readily utilized by, any non-research bridge personnel. The AASHTO fatigue evaluation criterion (S-N curve approach) is used to develop an algorithm which predicts the remaining life of the monitored structural detail, based up on a collected strain histogram, as well as additional information regarding the AASHTO detail category, the prior years of service for the detail, and traffic growth rate, supplied through the user interface.