Investigation of dynamic response of masonry minaret structures

Abstract

Almost all historical minarets in Turkey were constructed using cut stone, masonry blocks or combination of these two materials. The structural and geometrical properties of each masonry minaret, or slender tower structure, depend on many factors including the structural knowledge and applications at the time of construction, experience of the architect or engineer, seismicity of the region, and availability of construction materials in that area. Recent earthquakes in Turkey have shown that most masonry minarets in high seismic regions are vulnerable to structural damage and collapse. In this study, in order to investigate the dynamic behavior of historical unreinforced masonry minarets, three representative minarets with 20, 25, and 30 m height were modeled and analyzed using two ground motions recorded during the 1999 Kocaeli and Duzce, Turkey earthquakes. The modal analyses of the models have shown that the structural periods and the overall structural response are influenced by the minaret height and spectral characteristics of the input motion. The dynamic displacement and axial stress time histories are computed at the critical points on the minarets. During recent earthquakes, most minaret failures occurred above the base of the structure. Consistent with the observed response, the largest stresses were calculated at the same location.

Seismic Performance of Historical and Monumental Structures

“…While Sezen et al 2008 investigates distinct parameters affecting the behavior of RC minarets using a single model, the example presented below examines the effect of masonry material properties and minaret height on the minaret response using three different models. Detailed modeling properties and analysis results are presented in Dogangun et al (2008).…”

“…The computer program, ANSYS was used to model and analyze the minarets (see Dogangun et al 2008 for details). In the models, the modulus of elasticity of uncracked section, Poisson's ratio and unit weight of masonry material (ordinary limestone) are taken as 3000 MPa, 0.2, and 20 kN/m 3 , respectively.…”

“…Dynamic time history analyses are carried out for each minaret model using two ground motions recorded during the 12 November, 1999 Duzce and 17 August, 1999 Kocaeli earthquakes (see Dogangun et al 2008 for details). The input ground motion was applied only in one horizontal direction.…”

Arhitektonska i strukturna analiza povijesnih građevina

“…Therefore, researchers have been placing a strong emphasis on historical structures and their structural behaviour. Structural performance of different styles of historical structures has been investigated by researchers in a number of previous studies [1][2][3][4][5][6][7][8][9]. However, Madrasahs, and their structural behaviour, have yet to be the subject of a thorough research and analysis.…”

Structural performance analysis of historical combined structures

“…For example, timber framed with masonry infill (also generally known as half-timbered) is called "hımış" in Turkey, "pombaline" in Portugal, "half-timbered" in England, "fachwerk" in Germany, "colombage" in France, "dhajjidewari" in India, "casa baraccata" in Italy, "telar de medianería" in Spain, and "bahareque" in parts of Central and South America [3,4]. According to past studies, structural performance of traditional structures was mostly analysed by focusing on either solid masonry structures or timber frame with masonry infill structures [5][6][7][8][9][10][11][12][13][14][15][16]. This study focuses on a different type of traditional structures, i.e.…”