Health-monitoring and system-identification of an ancient aqueduct

Chrysostomou, Christis Ζ.; Stassis, Andreas

doi:10.12989/sss.2008.4.2.183

Cited by 17 publications

(7 citation statements)

References 5 publications

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“…It can be noted that although the accelerometers were placed on the left-hand-side wall, it was possible to capture the period of vibration of the 1 st mode that has the largest amplitude on the right-hand-side wall of the building. This is also reported in measurements from other masonry monuments [8][9][10], in which cases the periods of vibration were captured by accelerometers irrespective of their position. It is expected though that a period of vibration of a certain mode can be more easily obtained if the accelerometer is placed exactly at the position where the maximum amplitude of the mode-shape takes place.…”

Section: Comparison Of Recordings To Simula-tion Resultssupporting

confidence: 67%

Seismic Retrofitting and Health Monitoring of School Buildings of Cyprus

Chrysostomou¹,

Kyriakides²,

Kappos³

et al. 2013

TOBCTJ

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This is the published version of the paper.This version of the publication may differ from the final published version. Abstract: The vulnerability of existing buildings to seismic forces and their retrofitting is an international problem. The majority of structures in seismic-prone areas worldwide are structures that have been designed either without the consideration of seismic forces, or with previous codes of practice specifying lower levels of seismic forces. In Cyprus, after the three earthquakes that occurred in 1995, 1996, and 1999, the Cyprus State, acting in a pioneering way internationally, has decided the seismic retrofitting of all school buildings, taking into account the sensitivity of the society towards these structures, which house the future generation of the society. In this paper the overall assessment methodology is presented, along with details of the over 10 year ongoing retrofitting program of the school buildings of Cyprus, with emphasis on the description of the program and the development of a wireless monitoring system. In addition, mathematical models of selected school buildings are presented and comparison is made with in-situ measurement. Permanent repository link

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Section: Comparison Of Recordings To Simula-tion Resultssupporting

confidence: 67%

Seismic Retrofitting and Health Monitoring of School Buildings of Cyprus

Chrysostomou¹,

Kyriakides²,

Kappos³

et al. 2013

TOBCTJ

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“…G yy (ω) is the spectrum matrix of the response that can be estimated from the auto-power spectral density and the cross-power spectral density by the Welch's method [11]. Singular value decomposition (SVD) of the measured response spectrum is written as ˆω H yy G VSV (4) It is noticed that Eq. (4) has a similar form as Eq.(3).…”

Section: Frequency Domain Decompositionmentioning

confidence: 99%

“…The OMA techniques are also safe and suitable for the modal test of historical architecture. Relevant applications include an ancient Cypriot aqueduct built in 1747 [4], a Tunisian temple built in16th century [5], [6], and an Egyptian Al-Sultaniyamirarets built in 1337 [7].Moreover, the rapid increase of the research in theory and applications of this area has motivated the creation of the International Operational Modal Analysis Conference (IOMAC) since 2005.…”

Section: Introductionmentioning

confidence: 99%

Statistically Filtering Data for Operational Modal Analysis under Ambient Vibration in Structural Health Monitoring Systems

Wang

Song

et al. 2016

MATEC Web Conf.

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Abstract. Operational modal analysis (OMA) is prevalent in large structure modal identification for that it asks for output measurements only. To guarantee identification accuracy, theoretically, OMA data need to be a random process of Gaussian white noise (GWN). Although numerous OMA applications are found in practice, few have particularly discussed the data distribution and to what extent it would blur the modal judgement. This paper presents a method to sieve segments mostly obeying the GWN distribution out of a recording. With a windowing technique, the data segments are evaluated by the modified Kurtosis value. The process has been demonstrated on the monitoring data of two case study structures: one is a laboratory truss bridge excited by artificial forces, the other is a real cable-stayed bridge subject to environmental loads. The results show that weak randomness data may result in false peaks that would possibly mislead the non-parametric modal identification, such as using the Frequency Domain Decomposition method. To overcome, cares on selecting the optimal segment shall be exercised. The proposed method is verified effective to find the most suitable data for modal identification of structural health monitoring systems.

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“…The obtained data of AVS are important but can provide more meaningful results if they are used to update a finite element model of the building . In that respect, finite element model of the palace has been constructed in SAP2000‐V10 computer package , and dynamic analysis has been performed.…”

Section: Dynamic Properties Of the Beylerbeyi Palacementioning

confidence: 99%

Seismic evaluation and structural control of the historical Beylerbeyi Palace

Aras

Altay

2014

Struct. Control Health Monit.

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Summary The Beylerbeyi Palace was built between 1861 and 1865 on the Asian shore of Istanbul, and it is within the cultural heritage treasury of the world. Recent earthquakes in the Mediterranean basin have highlighted the particular vulnerability of historic masonry buildings and the need of properly defining retrofitting measures. In this respect, structural behaviour and the earthquake performance of the palace have been investigated. It is seen that the inherent dynamic properties of the palace make it vulnerable to earthquake ground shaking. In order to reduce the affect of ground shaking, the use of base isolation system has been investigated. It is determined that base isolation can be used to reduce the earthquake effects on the palace and ensure the structural performance under maximum considered earthquake. Copyright © 2014 John Wiley & Sons, Ltd.

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Health-monitoring and system-identification of an ancient aqueduct

Cited by 17 publications

References 5 publications

Seismic Retrofitting and Health Monitoring of School Buildings of Cyprus

Seismic Retrofitting and Health Monitoring of School Buildings of Cyprus

Statistically Filtering Data for Operational Modal Analysis under Ambient Vibration in Structural Health Monitoring Systems

Seismic evaluation and structural control of the historical Beylerbeyi Palace

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