Evaluation of a practical automatic damage assessment system using a single accelerometer for wooden frame houses

Evaluation of a practical automatic damage assessment system using a single accelerometer for wooden frame houses

Yuichi Furukawa, Ko Horita, Akira Mita, Ami Ogawa

Abstract In recent years, Structural Health Monitoring (SHM) has been attracting more attention as a method to determine the existence of the damage and its extent. The typical SHM system employs many sensors to assess the damage quantitatively and qualitatively. However, such a system is not appropriate for wooden houses as it is very costly despite the strong demand. Therefore, developing a low-cost SHM system for wooden houses is necessary. We have been working on algorithms that automatically determine the degree of damage from the maximum inter-story drift angle and natural frequencies using two accelerometers and evaluate the accuracy of the results by applying them to full-scale shake table experimental data.[1] Then, we evolved the system to use only a single accelerometer. In this advanced method, we estimate the first natural frequency without being annoyed by the fundamental frequency of ground motion, which often deteriorates frequency estimation accuracy. In this paper, we demonstrate the applicability of the SHM system using only one sensor in practical scenarios. Firstly, we examined the proposed method using only one accelerometer through the simulation approach. Secondly, we test the system’s applicability utilizing a series of large-scale shake table test data. Finally, we examine this method’s validity and economic feasibility, contributing to cost reduction and simplification of the algorithm for practical use.

Keywords
Structural Health Monitoring, Wooden Frame Wall Construction, Small Number Accelerometers, Maximum Inter-Story Drift Angle, Natural Frequency, Initial Tremor

Published online 3/30/2023, 7 pages
Copyright © 2023 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: Yuichi Furukawa, Ko Horita, Akira Mita, Ami Ogawa, Evaluation of a practical automatic damage assessment system using a single accelerometer for wooden frame houses, Materials Research Proceedings, Vol. 27, pp 143-149, 2023

DOI: https://doi.org/10.21741/9781644902455-18

The article was published as article 18 of the book Structural Health Monitoring

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

References
[1] Yu Suzuki, Akira Mita: Output only estimation of inter-story drift angle for buildings using small number of accelerometers, J. Struct. Constr. Eng., AIJ, Vol.81, No.725, 1061-1070, Jul.,2016. https://doi.org/10.3130/aijs.81.1061
[2] Kangqian Xu, Akira Mita: Maximum drift estimation based on only one accelerometer for damaged shear structures with unknown parameters, Journal of Building Engineering, 46, (2022), 103372, Sep.,2021. https://doi.org/10.1016/j.jobe.2021.103372
[3] Yuichi Furukawa, Ko Horita, Akira Mita: Proposal and Evaluation of Practical Automatic Damage Assessment System for Wood Frame Houses, AIJ, Summaries of Technical Papers of Annual Meetng, Hokkaido, #1164, Sep., 2022