Modal parameter identification of in-filled RC frames with low strength concrete using ambient vibration

Arslan, Mehmet Emin; Durmuş, Ahmet

doi:10.12989/sem.2014.50.2.137

Cited by 6 publications

(4 citation statements)

References 14 publications

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“…It is in fact well known that in the presence of lateral actions masonry infills partially detach from the surrounding frame, remaining in contact with this only in correspondence of two opposite corners. A significant bracing action, affecting both the strength and stiffness originates by this mechanism, as demonstrated by a large number of experimental investigations (Smith 1966, Page et al 1985, Mehrabi et al 1966, Cavaleri et al 2005, Misir et al 2012, Arslan and Durmus 2014, Al-Nimry et al 2014 and analytical-numerical studies (Dhanasekar and Page 1986, Chrysostomou 1991, Saneinejad and Hobbs 1995, Asteris 2003, 2005, 2008, Moghaddam 2004, Hora 2006, Kakaletsis and Karayannis 2009, Agrawal and Hora 2012, Erdolen and Dorana 2012, Kose and Kayadelen 2013, Al-Nimry et al 2014, Campione et al 2014, Cavaleri and Tripani 2015. However, despite several modelling strategies available in the literature, going from pinned equivalent struts macromodeling to FE micromodeling (Moghaddam and Dowling 1987, Asteris et al 2011, Chrysostomou and Asteris 2012, masonry infills are generally not accounted in models because of the large amount of uncertainties arising during their structural identification.…”

Section: Introductionmentioning

confidence: 97%

Parameters affecting the fundamental period of infilled RC frame structures

Asteris¹,

Repapis²,

Tsaris³

et al. 2015

Earthquakes and Structures

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Despite the fact that the fundamental period appears to be one of the most critical parameters for the seismic design of structures according to the modal superposition method, the so far available in the literature proposals for its estimation are often conflicting with each other making their use uncertain. Furthermore, the majority of these proposals do not take into account the presence of infills walls into the structure despite the fact that infill walls increase the stiffness and mass of structure leading to significant changes in the fundamental period numerical value. Toward this end, this paper presents a detailed and indepth analytical investigation on the parameters that affect the fundamental period of reinforce concrete structure. The calculated values of the fundamental period are compared against those obtained from the seismic code and equations proposed by various researchers in the literature. From the analysis of the results it has been found that the number of storeys, the span length, the stiffness of the infill wall panels, the location of the soft storeys and the soil type are crucial parameters that influence the fundamental period of RC buildings.

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Section: Introductionmentioning

confidence: 97%

Parameters affecting the fundamental period of infilled RC frame structures

Asteris¹,

Repapis²,

Tsaris³

et al. 2015

Earthquakes and Structures

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“…There are some ways to calibrate, update or verify the FEM models of the civil engineering structures. One of the most utilized recent technique is the "Operational Modal Analysis" technique [41,50,51]. Although this technique provides almost accurate results, special instrumentation is needed to obtain the dynamic characteristics of the structure.…”

Section: Iskender Pasha Historical Minaret and Calibrated Finite Elemmentioning

confidence: 99%

- Dynamic Seismic and Wind Response of Masonry Minarets

Türkeli̇

2020

Period. Polytech. Civil Eng.

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Historical masonry structures i.e. minarets, towers, mosques or bastions are the heritage of past generations to the future societies as they carry the traces of the past communities. Among these structures, historical masonry minarets are one of the most generally constructed structure that reflects the beauty and magnificence of Islamic culture. Under severe winds and earthquakes, most of them were severely damaged or collapsed. Therefore, it is an inevitable duty for us to conduct and investigate their dynamic behavior under these vital actions of nature. In this study, the dynamic seismic and wind response of a historical minaret of İskenderpaşa Mosque that is selected from the technical literature is investigated by using different methods i.e. wind loading procedures of TS498, CICIND Model Code and Eurocode 1, the design spectrums of CICIND Model Code and Eurocode 8 for different types of soils, the time histories of real ground motions of Düzce and Kocaeli Earthquakes. At the end of the study, top joint displacements and stress distributions are obtained and interpreted. The findings of this study showed that the dynamic behavior of this historical masonry minaret is wind dominant (CICIND Model Code) and tensile and shear stress accumulations at the junction point of transition segment and cylindrical body of the minaret is the main reason for the collapse without showing any ductile behavior.

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“…Since the analytical models that are made do not fully reflect the actual behavior of the building, real dynamic characteristics cannot be obtained due to the support conditions, the mass of structures and etc. To obtain more accurate results in analytical studies, researchers have made both experiments performed on full-scale constructions in the field and in experimental studies on scaled constructions in the laboratory conditions [2][3][4][5][6][7][8][9]. For this reason, experimental methods are needed to create a finite element model that will represent actual behavior.…”

Section: Introductionmentioning

confidence: 99%

The effects of infill wall on dynamic characteristics of reinforced concrete frame systems

Komur¹,

Deneme²,

Kara³

2019

JSEAM

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This study presents an experimental investigation on the dynamic characteristics of infilled Reinforced Concrete (RC) frames. For this purpose, a 1/3-scaled, one-bay, three-storey RC frame was produced and tested by using ambient vibration test. The experiments were performed on sequentially produced three specimens which use the same single reinforced frame. The infill walls were made of hollow clay brick. The frequency, mode shapes and damping ratios in the in-plane direction of patterns were obtained by six accelerometers. Fifteen-minute records under ambient vibration were taken for each model, and the dynamic characteristics were determined using the ambient response testing and modal identification software (ARTeMIS) program. The experiments showed that the infill walls significantly affected the frequency values and damping ratios of the frame system. As a result of this study, the presence of damaged/undamaged infill walls lead to an increase in the frequency values and the damping ratios for the first three modes of the frame systems. On the other hand, the natural frequency of the first three modes of with undamaged infill walls is more than those with damaged ones. While the damping ratios for undamaged infill walls were increased at first two modes and it was decreased at the third mode.

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Modal parameter identification of in-filled RC frames with low strength concrete using ambient vibration

Cited by 6 publications

References 14 publications

Parameters affecting the fundamental period of infilled RC frame structures

Parameters affecting the fundamental period of infilled RC frame structures

- Dynamic Seismic and Wind Response of Masonry Minarets

The effects of infill wall on dynamic characteristics of reinforced concrete frame systems

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