Investigation of seismic safety of a masonry minaret using its dynamic characteristics

Başaran, Hakan; Demir, Ali; Ercan, Emre; Nohutçu, Halil; Hökelekli, Emin; Kozanoglu, Celalettin

doi:10.12989/eas.2016.10.3.523

Cited by 20 publications

(15 citation statements)

References 14 publications

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“…where [M] and [K] represent the mass and rigidity matrices and Ẍ(t) and X(t) are vectors of time varying acceleration and displacement, respectively [31]. Finally, in the linear time history analyses utilized in this study, linear elastic force-deformation relationships are considered.…”

Section: Methodsmentioning

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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Section: Methodsmentioning

confidence: 99%

- Dynamic Seismic and Wind Response of Masonry Minarets

Türkeli̇

2020

Period. Polytech. Civil Eng.

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“…Material properties of masonry walls are determined by empirical formula from the literature by considering the material properties of masonry stone units and mortar constituents. Due to their complex geometric features, modelling of mosques, churches, minarets, towers and bridges involves the use of macro modelling technique [7,[22][23][29][30][31][32].…”

Section: Numerical Modeling Of Masonry Structuresmentioning

confidence: 99%

Effect of Cohesive Contact of Backfill with Arch and Spandrel Walls of a Historical Masonry Arch Bridge on Seismic Response

Hökelekli

2019

Period. Polytech. Civil Eng.

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Historical masonry bridges generally consist of arches, spandrels walls, backfills, piers and foundations. Under the effects such as earthquake, flood and wind, the most vulnerable structural elements of bridges against out-of-plane seismic motions are spandrel walls. Increasing length and height of spandrel walls increases the vulnerability of the bridge under loads in vertical and transverse directions. The aim of this research is to examine the in-plane and out-of-plane non-linear structural responses of the spandrel walls of a historical masonry bridge. For this purpose, a historical masonry arch bridge with built in 1787 in Bartın-Turkey was chosen as the subject structure. The 3D finite element model and nonlinear seismic analyses of the bridge were performed with ABAQUS. Initially, the backfill-spandrels and backfill-arch interfaces of the bridge were modeled with and without cohesive contact. The non-linear material responses of the spandrel walls and the arch units were defined using Concrete Damage Plasticity material model and those of the backfill unit were defined with Mohr-Coulomb material model. The east-west component of 17 August 1999 Kocaeli Earthquake’s acceleration records was used in the analyses. The east-west acceleration component was applied on the bridge in-plane and out-of-plane directions during the time-history non-linear seismic analysis of the bridge. The results obtained from the analyses with and without the consideration of cohesive contact were compared to evaluate the seismic responses of the spandrel walls. As a result, cohesive interface behavior was found to significantly affect the spandrel wall response under in- plane and out-of-plane seismic forces.

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“…Therefore, the dynamic response of the representative minarets considered in this study was determined by considering the effect of SSI. Other than these, generally, the dynamic seismic response of RC minarets is studied without considering SSI effect (Örmecioğlu et al 2011, Türk and Coşgun 2012, Mortezaei et al 2012, Pekgökgöz et al 2013, Türkeli 2014, Ural and Fırat 2015, Clemente et al 2015, Basaran et al 2016, Erdoğan et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Comparative Dynamic Seismic Analyses of RC Minarets Strengthened with FRP and Buttresses

Türkeli̇

2020

Doğal Afetler Ve Çevre Dergisi

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In recent earthquakes occurred in Turkey, an unexpected number of reinforced concrete (RC) minarets were heavily damaged or collapsed causing loss of lives and economic damages. These structures can be counted as the most common constructed slender structures in Turkey. Therefore, the detailed behavior of these slender structures should be determined in order to strengthen the existing ones and construct safer and stronger RC minarets. In this study, the most common constructed types of RC minarets were analyzed under 17 August 1999 Mw 7.4 Kocaeli Earthquake for the determination of the effectiveness of strengthening techniques namely fiber reinforced polymers (FRP) and buttresses. Also, soil-structure interaction (SSI) is included in the dynamic seismic analyses of the minarets as proposed by Burman et al. (2012). At the end of the analyses performed, it was determined that FRP strengthening is more effective in enhancing the seismic response of RC minarets as the height of the minaret increases when compared with the buttress strengthening. Also, the stress demand locations predicted from the dynamic seismic analyses of the representative minarets were found to be consistent with the damages observed in recent earthquakes.

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Investigation of seismic safety of a masonry minaret using its dynamic characteristics

Cited by 20 publications

References 14 publications

- Dynamic Seismic and Wind Response of Masonry Minarets

- Dynamic Seismic and Wind Response of Masonry Minarets

Effect of Cohesive Contact of Backfill with Arch and Spandrel Walls of a Historical Masonry Arch Bridge on Seismic Response

Comparative Dynamic Seismic Analyses of RC Minarets Strengthened with FRP and Buttresses

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