基于声发射技术的FRP/钢约束RC柱聚类分析与损伤识别

IF 2.1 3区 工程技术 Q2 ENGINEERING, CIVIL
Fangzhu Du, Dongsheng Li, Dapeng Qiu
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引用次数: 2

摘要

本文介绍了新提出的纤维增强聚合物(FRP)/钢约束钢筋混凝土柱的损伤评估和模式识别。FRP材料、钢管和钢筋混凝土的相互作用导致了复杂的损伤机制和无形的损伤模式。应用主声发射(AE)技术对循环载荷作用下的损伤过程进行监测,并对遮蔽损伤进行检测。提取特征声发射参数,如能量和持续时间,以揭示损伤演化并评估损伤状态。确定了三个典型的损坏阶段。应用模糊C均值(FCM)算法和粒子群优化(PSO)算法作为有效的聚类工具,对FRP/钢约束RC柱的不同损伤信号进行了判别。基于典型声发射特征的统计分析,确定并说明了五种类型的损伤机制。此外,提取了典型的损伤波形,并基于小波变换对每个损伤信号的频率内容进行了讨论。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Cluster analysis and damage identification for FRP/steel-confined RC column using AE technique
This article presents the damage evaluation and pattern recognition for the newly proposed fiber reinforced polymer (FRP)/steel-confined reinforced concrete columns. The interaction of FRP material, steel tube, and reinforced concrete lead to complex damage mechanisms and invisible damage modes. The prevailing acoustic emission (AE) technique was applied to monitor the damage process and detect the sheltered damages under cyclic loading. Characteristic AE parameters, such as energy and duration, were extracted to disclose the damage evolution and evaluate the damage state. Three typical damage stages were identified. The fuzzy C.means (FCM) algorithm and particle swarm optimization (PSO) algorithm were applied as efficient clustering tools to discriminate different damage signals of FRP/steel-confined RC columns. Five types of damage mechanisms were identified and illustrated based on the statistical analysis of typical AE features. Furthermore, typical damage waveforms were extracted, the frequency content of each damage signal was discussed on the basis of wavelet transform.
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来源期刊
Smart Structures and Systems
Smart Structures and Systems 工程技术-工程:机械
CiteScore
6.50
自引率
8.60%
发文量
0
审稿时长
9 months
期刊介绍: An International Journal of Mechatronics, Sensors, Monitoring, Control, Diagnosis, and Management airns at providing a major publication channel for researchers in the general area of smart structures and systems. Typical subjects considered by the journal include: Sensors/Actuators(Materials/devices/ informatics/networking) Structural Health Monitoring and Control Diagnosis/Prognosis Life Cycle Engineering(planning/design/ maintenance/renewal) and related areas.
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