动态效应对非破坏性落下重量偏偏波测试仪测试结果的影响
Paweł Tutka1, Roman Nagórski1, Magdalena Złotowska1
1Faculty of Civil Engineering, Warsaw University of Technology, Al. Armii Ludowej 16, 00-637 Warsaw, Poland.
Materials (Basel, Switzerland)
|September 14, 2024
概括
考虑惯力力的动态计算模型对路面曲率分析产生重大影响,特别是在落重曲率计 (FWD) 测试中. 忽视这些动态效应会导致背后计算的硬度模块和疲劳寿命预测的显著差异.
科学领域:
- 土木工程 土木工程是指土木工程.
- 地质技术工程 地质技术工程
- 计算力学 计算力学 计算力学
背景情况:
- 路面分析通常依赖于静态模型,可能过度简化对短暂负载的反应.
- 下降重量偏流仪 (FWD) 测试对于评估路面层刚度至关重要.
- 准确的路面层模块的逆向计算对于结构评估和维护规划至关重要.
研究的目的:
- 在动态计算模型中研究惯性力对在时间变化的负载下路面曲折的影响.
- 为了评估动态效应对刚度模块的影响,从FWD测试进行了逆向计算.
- 评估动态与静态分析对路面变形和疲劳寿命预测的影响.
主要方法:
- 开发和应用一个包含惯力力的动态计算模型.
- 在不同的负载频率和持续时间下对路面曲折进行分析.
- 使用模拟的FWD数据,从静态和动态模型中进行逆向计算的刚度模块的比较.
- 根据从这两种分析中得出的模块来确定路面变形和疲劳寿命.
主要成果:
- 在负载持续时间小于0.04秒的情况下,惯性力显著影响路面曲折.
- 静态和动态分析产生了相当不同的屈曲值和反向计算的刚度模块 (几百分比差异).
- 路面变形和疲劳寿命的预测在静态和动态建模方法之间存在很大差异.
结论:
- 在计算模型中必须考虑动态效应,包括惯性力,以进行准确的路面分析,特别是在FWD测试中.
- 在反向计算过程中忽视动态考虑因素可能会导致路面层硬度评估中的不准确性.
- 逆向计算结果的敏感性凸显了使用适当的动态建模对于可靠的路面性能评估的重要性.
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