Low-Strain Damage Imaging Detection Experiment for Model Pile Integrity Based on HHT

Ziyang Jiang, Ziping Wang, Kan Feng, Yang Zhang, Rahim Gorgin
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Abstract

With the advancement of computer and mathematical techniques, significant progress has been made in the 3D modeling of foundation piles. Existing methods include the 3D semi-analytical model for non-destructive low-strain integrity assessment of large-diameter thin-walled pipe piles and the 3D soil-pile dynamic interaction model. However, these methods have complex analysis procedures and substantial limitations. This paper introduces an innovative and streamlined 3D imaging technique tailored for the detection of pile damage. The approach harnesses the power of an eight-channel ring array transducer to capture internal reflection signals within foundation piles. The acquired signals are subsequently processed using the Hilbert-Huang Transform (HHT), a robust analytical tool known for its effectiveness in handling non-stationary signals. Through the development of a sophisticated multi-channel ring array imaging algorithm, this technique empowers engineers and researchers to identify various pile defects, including their specific type, precise location, and obtain detailed 3D imaging representations. The findings of this research offer a valuable blend of theoretical insights and practical guidance, significantly advancing the state-of-the-art in the realm of concrete pile integrity inspection. By simplifying and enhancing the assessment process, this innovative approach not only addresses the complexities of existing methods but also contributes to the overall safety and reliability of concrete engineering structures.
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基于HHT的模型桩完整性低应变损伤成像检测实验
随着计算机和数学技术的进步,基础桩的三维建模取得了重大进展。现有的方法包括大直径薄壁管桩无损低应变完整性评价的三维半解析模型和三维土-桩动力相互作用模型。然而,这些方法有复杂的分析程序和很大的局限性。本文介绍了一种专为桩基损伤检测而设计的创新型流线型三维成像技术。该方法利用八通道环形阵列换能器的功率来捕获基桩内的内部反射信号。采集的信号随后使用希尔伯特-黄变换(HHT)进行处理,这是一种鲁棒的分析工具,以其处理非平稳信号的有效性而闻名。通过开发复杂的多通道环形阵列成像算法,该技术使工程师和研究人员能够识别各种桩缺陷,包括其具体类型,精确位置,并获得详细的3D成像表示。本研究结果提供了有价值的理论见解和实践指导,显著推进了混凝土桩完整性检测领域的最新技术。通过简化和加强评估过程,这种创新的方法不仅解决了现有方法的复杂性,而且有助于混凝土工程结构的整体安全性和可靠性。
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来源期刊
SDHM Structural Durability and Health Monitoring
SDHM Structural Durability and Health Monitoring Engineering-Building and Construction
CiteScore
2.40
自引率
0.00%
发文量
29
期刊介绍: In order to maintain a reasonable cost for large scale structures such as airframes, offshore structures, nuclear plants etc., it is generally accepted that improved methods for structural integrity and durability assessment are required. Structural Health Monitoring (SHM) had emerged as an active area of research for fatigue life and damage accumulation prognostics. This is important for design and maintains of new and ageing structures.
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