结构有效预应力无损检测与健康监测技术

IF 5.4 2区 工程技术 Structural Control & Health Monitoring Pub Date : 2023-09-28 DOI:10.1155/2023/8940008
Junfeng Jia, Longguan Zhang, Jinping Ou, Xize Chen
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引用次数: 0

摘要

预应力结构广泛应用于桥梁和大跨度空间结构中,准确评估预应力状态对结构维护具有重要意义。本文综述了结构有效预应力的无损检测和健康监测技术。具体来说,本文综述了基于光纤布拉格光栅(FBG)传感器、基于磁弹性(ME)传感器、基于动态响应、基于超声导波(UGW)、基于机电阻抗(EMI)和基于电阻的方法。首先,介绍和分析了各种技术的原理、适用范围和测量精度,总结了各种技术的优点和局限性:光纤光栅传感器和ME传感器测量精度高,已在实际工程中得到应用,但在结构施工时需要进行预安装;基于动力响应的方法对索力评估非常有效,但不适用于预应力混凝土(PSC)结构的预应力评估;基于ugw、emi和电阻的预应力评估方法在实验室试验中显示出良好的潜力,但其在实际工程中的可行性和准确性有待验证。其次,从测量范围、测量结果的可靠性、考虑长期监测的稳定性和耐久性以及成本效益四个方面讨论了每种方法面临的挑战和讨论。最后,提出了一种决策树方法,用于在具体应用场景中选择最合适的预应力评估方法。
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Nondestructive Testing and Health Monitoring Techniques for Structural Effective Prestress
Prestressed structures are widely employed in bridges and large-span spatial structures, and the accurate evaluation of prestress state is of great importance for structural maintenance. This paper reviews the nondestructive testing (NDT) and health monitoring techniques for structural effective prestress. Specifically, the fiber Bragg grating (FBG) sensor-based, magnetic-elastic (ME) sensor-based, dynamic response-based, ultrasonic guided wave (UGW)-based, electromechanical impedance (EMI)-based, and electrical resistance-based methods are reviewed in this paper. Firstly, the principle, application range, and measuring accuracy of each technique are introduced and analyzed, and the benefits and limitations of each technique are summarized: The FBG sensor and ME sensor take on high measuring accuracy and have been applied in practical engineering, but they are required to be preinstalled during structural construction; the dynamic response-based method is greatly effective in cable force assessment but not suitable for prestress evaluation of prestressed concrete (PSC) structures; the UGW-based, EMI-based, and electrical resistance-based methods have shown favorable potential for prestress assessment in laboratory experiments, but their feasibility and accuracy in practical engineering need to be verified. Secondly, the challenges and discussion of each method are discussed in the following four aspects: measuring range, reliability of measuring results, stability and durability considering long-term monitoring, and cost-efficiency. Finally, a decision tree is proposed to choose the most appropriate prestress evaluation method in a specific application scenario.
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来源期刊
Structural Control & Health Monitoring
Structural Control & Health Monitoring Engineering-Building and Construction
自引率
13.00%
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期刊介绍: The Journal Structural Control and Health Monitoring encompasses all theoretical and technological aspects of structural control, structural health monitoring theory and smart materials and structures. The journal focuses on aerospace, civil, infrastructure and mechanical engineering applications. Original contributions based on analytical, computational and experimental methods are solicited in three main areas: monitoring, control, and smart materials and structures, covering subjects such as system identification, health monitoring, health diagnostics, multi-functional materials, signal processing, sensor technology, passive, active and semi active control schemes and implementations, shape memory alloys, piezoelectrics and mechatronics. Also of interest are actuator design, dynamic systems, dynamic stability, artificial intelligence tools, data acquisition, wireless communications, measurements, MEMS/NEMS sensors for local damage detection, optical fibre sensors for health monitoring, remote control of monitoring systems, sensor-logger combinations for mobile applications, corrosion sensors, scour indicators and experimental techniques.
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