基于声发射技术的钢筋混凝土结构裂缝形成评价

Q4 Engineering

工程设计学报 Pub Date : 2013-10-20 DOI:10.1155/2013/126509

Alireza Panjsetooni, N. M. Bunnori, A. Vakili, Z. Shirkhani, Zeinab Shirkhani

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引用次数: 1

摘要

声发射(AE)是一种重要的无损评价技术，可用于结构工程领域的局部和全局监测。本文采用声发射技术对钢筋混凝土结构的裂缝形成过程进行了研究。对若干钢筋混凝土一层框架进行了荷载循环试验和声发射监测。采用松弛比法和静载比法对声发射试验数据进行分析。在接近极限荷载时，松弛率占主导地位，达到58%。此外，还利用静振率和载荷比区分了三种损伤等级。加载和卸载过程中松弛比法和静载比法的变化趋势表明，这两种方法对RC框架试件的裂纹扩展具有较强的敏感性，能够反映损伤程度。结果表明，声发射可以作为预测钢筋混凝土剩余使用寿命的一种可行方法。此外，根据松弛比和荷载、静振比的计算结果，提出了新的图表。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Fracture Formation Evaluation of Reinforced Concrete Structure Using Acoustic Emission Technique

Acoustic emission (AE) is an important nondestructive evaluation (NDE) technique used in the field of structural engineering for both case local and global monitoring. In this study AE technique with a new approach was employed to investigate the process of fracture formation in reinforced concrete structure. A number of reinforced concrete (RC) one story frames were tested under loading cycle and were simultaneously monitored using AE. The AE test data was analyzed using the relaxation ratio and calm and load ratio method. Also, the relaxation ratio was dominated with approaching load to 58% of the ultimate load. In addition three levels of damage using calm and load ratio were distinguished. The trend of relaxation ratio and calm and load ratio method during loading and unloading showed that these methods are strongly sensitive with cracks growth in RC frame specimens and were able to indicate the levels of damage. Also, results showed that AE can be considered as a viable method to predict the remaining service life of reinforced concrete. In addition, with respect to the results obtained from relaxation ratio and, load and calm ratio indicated, a new chart is proposed.

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来源期刊

工程设计学报 Engineering-Engineering (miscellaneous)

CiteScore

0.60

自引率

0.00%

发文量

2447

审稿时长

14 weeks

期刊介绍： Chinese Journal of Engineering Design is a reputable journal published by Zhejiang University Press Co., Ltd. It was founded in December, 1994 as the first internationally cooperative journal in the area of engineering design research. Administrated by the Ministry of Education of China, it is sponsored by both Zhejiang University and Chinese Society of Mechanical Engineering. Zhejiang University Press Co., Ltd. is fully responsible for its bimonthly domestic and oversea publication. Its page is in A4 size. This journal is devoted to reporting most up-to-date achievements of engineering design researches and therefore, to promote the communications of academic researches and their applications to industry. Achievments of great creativity and practicablity are extraordinarily desirable. Aiming at supplying designers, developers and researchers of diversified technical artifacts with valuable references, its content covers all aspects of design theory and methodology, as well as its enabling environment, for instance, creative design, concurrent design, conceptual design, intelligent design, web-based design, reverse engineering design, industrial design, design optimization, tribology, design by biological analogy, virtual reality in design, structural analysis and design, design knowledge representation, design knowledge management, design decision-making systems, etc.