Structural condition assessment with structural health monitoring systems and nonlinear simplified models

IF 4.3 2区 工程技术 Q1 ENGINEERING, CIVIL Earthquake Engineering & Structural Dynamics Pub Date : 2024-04-17 DOI:10.1002/eqe.4132
Emre Aytulun, Serdar Soyöz
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Abstract

Damage assessment of tall buildings after an earthquake is important for efficient postearthquake management due to social and economic reasons. Structural health monitoring (SHM) system enables rapid, remote, and objective condition assessment for tall buildings by controlling dynamic properties of structures. However, tracking only the changes in dynamic properties of tall buildings may not be sufficient for damage assessment. In this paper, changes in modal frequencies and maximum interstory drift ratio are investigated as damage assessment indicators because they can be obtained by analyzing vibration data recorded by SHM system. On the other hand, limited number of sensors are used due to economic reasons. Therefore, in this paper, firstly, a unique methodology on development and optimization of nonlinear simplified model for tall buildings is presented to estimate responses of noninstrumented floors from instrumented floors. After that, new threshold values are suggested for changes in dynamic properties and interstory drift ratios to reliably decide performance level of structures after earthquakes. Finally, the proposed method was validated with vibration record of a real damaged building.

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利用结构健康监测系统和非线性简化模型进行结构状况评估
由于社会和经济原因,震后高层建筑的损坏评估对于有效的震后管理非常重要。结构健康监测(SHM)系统可通过控制结构的动态特性,对高层建筑进行快速、远程和客观的状况评估。然而,仅跟踪高层建筑动态特性的变化可能不足以进行损坏评估。本文研究了模态频率和最大层间漂移率的变化作为损伤评估指标,因为它们可以通过分析 SHM 系统记录的振动数据获得。另一方面,由于经济原因,使用的传感器数量有限。因此,本文首先介绍了一种开发和优化高层建筑非线性简化模型的独特方法,以从有仪器的楼层估算无仪器楼层的响应。然后,针对动态特性和层间漂移比的变化提出了新的阈值,以可靠地确定地震后结构的性能水平。最后,利用一栋真实受损建筑的振动记录对所提出的方法进行了验证。
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来源期刊
Earthquake Engineering & Structural Dynamics
Earthquake Engineering & Structural Dynamics 工程技术-工程:地质
CiteScore
7.20
自引率
13.30%
发文量
180
审稿时长
4.8 months
期刊介绍: Earthquake Engineering and Structural Dynamics provides a forum for the publication of papers on several aspects of engineering related to earthquakes. The problems in this field, and their solutions, are international in character and require knowledge of several traditional disciplines; the Journal will reflect this. Papers that may be relevant but do not emphasize earthquake engineering and related structural dynamics are not suitable for the Journal. Relevant topics include the following: ground motions for analysis and design geotechnical earthquake engineering probabilistic and deterministic methods of dynamic analysis experimental behaviour of structures seismic protective systems system identification risk assessment seismic code requirements methods for earthquake-resistant design and retrofit of structures.
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