Nonlinear System Identification for Damage Detection

Farrar, Charles R.; Worden, Keith; Todd, Michael D.; Park, Gyuhae; Nichols, J. M.; Adams, Douglas E.; Bement, Matt; Farinholt, Kevin

doi:10.2172/922532

Cited by 100 publications

(67 citation statements)

References 92 publications

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“…The coherence function can be utilized to discriminate linear and nonlinear structural systems [14]. This function value ranges from 0.0 to 1.0.…”

Section: Methodsmentioning

confidence: 99%

Dynamic Characteristic Identification of Seismic-Excited Multi-Story Buildings through Response-Only Technique

Budipriyanto¹,

Suprobo²

2014

MST

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Identifying dynamic characteristics of civil engineering structures is still a challenging task. It intends to assess behavior of the structures under time-dependent loads. This paper discusses a methodology suitable for identifying the characteristics of multi-story buildings using only their measured response under earthquake ground excitations. Appropriateness of technique used for structural identification was corroborated through coherence of the structure's responses. The methodology was applied for identifying the characteristics of 14-story and 20-story office buildings located in a high seismic region. Responses of these two buildings recorded during three different seismic ground motions were investigated. The buildings' response spectral densities and singular values were computed and utilized to identify their dynamic characteristics, viz. modal frequencies, damping factors, and mode types such as bending or torsion mode. Results of this study were validated through comparisons with the results reported using different structural identification techniques. It indicated that the methodology implemented in this study was capable of identifying the dynamic characteristics of multi-story buildings using responses under seismic ground motions. Abstrak Identifikasi Karakteristik Dinamik Gedung Bertingkat dengan Menggunakan Respons Seismik dari Struktur.Identifikasi karakteristik dinamik struktur sipil bertujuan untuk mempelajari perilakunya akibat beban yang bervariasi dengan waktu. Makalah ini membahas metodologi untuk identifikasi struktur gedung bertingkat dengan hanya menggunakan respons yang diukur selama terjadi gempa. Dalam makalah ini, koherensi respons struktur digunakan untuk menjustifikasi penerapan metode yang dipakai. Metodologi tersebut diaplikasikan untuk identifikasi karakteristik dinamik (frekwensi, faktor redaman, dan ragam) struktur gedung bertingkat 14 dan 20 dengan menggunakan respons percepatan yang direkam selama tiga kejadian gempa. Hasil dari studi ini dibandingkan dengan hasil studi terdahulu yang diperoleh dengan metode yang berbeda. Hasil tersebut mengindikasikan bahwa metodologi ini mampu mengidentifikasi karakteristik dinamik struktur gedung bertingkat dengan menggunakan responsnya akibat beban gempa.

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“…The coherence function can be utilized to discriminate linear and nonlinear structural systems [14]. This function value ranges from 0.0 to 1.0.…”

Section: Methodsmentioning

confidence: 99%

Dynamic Characteristic Identification of Seismic-Excited Multi-Story Buildings through Response-Only Technique

Budipriyanto¹,

Suprobo²

2014

MST

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“…Modeling hysteresis (e.g., [4,15,29,39,40,46]) is inherently challenging; however, it is necessary in that it has broad utility in many engineering disciplines, including smart structures, robotics, mechatronics, structural control, structural health monitoring, damage detection, and earthquake engineering. Rapid advances in sensor technology are providing researchers in different fields of science and engineering with valuable data collected from real-world measurements.…”

Section: Motivations Of This Studymentioning

confidence: 99%

Dual input–output pairs for modeling hysteresis inspired by mem-models

et al. 2017

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“…However they are suitable for rotating machinery and structural integrity assessment respectively. SHM combines both damage detection philosophies and translates them into an active/passive of online/offline systems in order to monitor the health status of the structure (Farrar et al, 2007) as shown in Fig. 3.…”

Section: Structural Health Monitoring (Shm)mentioning

confidence: 99%

Damage identification using wireless structural health monitoring system through smart sensor application

Shirazi¹,

Mustapha²,

Ahmad

2017

Int. j. adv. appl. sci

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Delamination, disbanding, void, low impact resistance and visible internal damage are some of damages uniquely found in the structure. Any damage found on the structure require repair. The inspection need to be done to detect the damage on structure before the structure can be repaired. NonDestructive Inspection (NDI) and Structural health monitoring (SHM) concept were used to detect flaws from structures. But the SHM differs from NDT which the system used to monitor the integrity of mechanical structures in a continuous and independent way. SHM helps to reduce financial cost for maintenance. SHM can monitor this situation in active and passive states, either by online or offline monitoring. The use of SHM is to augment the NDI application and not to replace it. This paper presents the damage identification technique by using the improved design of wireless structural health monitoring system. Smart PZT sensors were used as an actuator and receiver, coupled with two XBee's and two Ardiuno as signal generator and signal receiver. Program execution on transmitting and receiving the ultrasonic guided wave via the PZT sensor had been written in Makerplot. The acquired results showed that the wave is more even in non-defected area and disrupted in affected area.

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Nonlinear System Identification for Damage Detection

Abstract: About the cover: The figure in the upper left is an idealization of an actual test structure with loose internal parts that was subjected to an 18 Hz base input on a shake table. Los Alamos National Laboratory, an affirmative action/ equal opportunity employer, is operated by Los Alamos

Cited by 100 publications

References 92 publications

Dynamic Characteristic Identification of Seismic-Excited Multi-Story Buildings through Response-Only Technique

Dynamic Characteristic Identification of Seismic-Excited Multi-Story Buildings through Response-Only Technique

Dual input–output pairs for modeling hysteresis inspired by mem-models

Damage identification using wireless structural health monitoring system through smart sensor application

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