Vibration-based method for story-level damage detection of the reinforced concrete structure

IF 2.9 4区工程技术 Q2 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS

Computers and Concrete Pub Date : 2021-01-01 DOI:10.12989/CAC.2021.27.1.029

S. Mehboob, Qaiser U. Zamana

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引用次数: 1

Abstract

This study aimed to develop a method for the determination of the damaged story in reinforced concrete (RC) structure with ambient vibrations, based on modified jerk energy methodology. The damage was taken as a localized reduction in the stiffness of the structural member. For loading, random white noise excitation was used, and dynamic responses from the finite element model (FEM) of 4 story RC shear frame were extracted at nodal points. The data thus obtained from the structure was used in the damage detection and localization algorithm. In the structure, two damage configurations have been introduced. In the first configuration, damage to the structure was artificially caused by a local reduction in the modulus of elasticity. In the second configuration, the damage was caused, using the Elcentro1940 and Kashmir2005 earthquakes in real-time history. The damage was successfully detected if the frequency drop was greater than 5% and the mode shape correlation remained less than 0.8. The results of the damage were also compared to the performance criteria developed in the Seismostruct software. It is demonstrated that the proposed algorithm has effectively detected the existence of the damage and can locate the damaged story for multiple damage scenarios in the RC structure.

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基于振动的钢筋混凝土结构层间损伤检测方法

本研究旨在发展一种基于改进的猛推能量法的钢筋混凝土(RC)结构在环境振动下的损伤层的确定方法。损伤被认为是结构构件刚度的局部降低。加载时采用随机白噪声激励，提取4层钢筋混凝土剪力框架节点处有限元模型的动力响应。从结构中获得的数据用于损伤检测和定位算法。在结构中，引入了两种损伤形态。在第一种结构中，由于局部弹性模量的降低，人为地造成了结构的损伤。在第二种配置中，使用Elcentro1940和Kashmir2005地震的实时历史数据来计算造成的破坏。如果频率下降大于5%且模态振型相关小于0.8，则可以成功检测到损伤。破坏结果也与Seismostruct软件中制定的性能标准进行了比较。结果表明，该算法能够有效地检测出损伤的存在性，并能在多种损伤场景下对损伤层进行定位。

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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来源期刊

Computers and Concrete 工程技术-材料科学：表征与测试

CiteScore

8.60

自引率

7.30%

发文量

审稿时长

13.5 months

期刊介绍： Computers and Concrete is An International Journal that focuses on the computer applications in be considered suitable for publication in the journal. The journal covers the topics related to computational mechanics of concrete and modeling of concrete structures including plasticity fracture mechanics creep thermo-mechanics dynamic effects reliability and safety concepts automated design procedures stochastic mechanics performance under extreme conditions.