Akademik Veri Yönetim Sistemi
ENGINEERING FAILURE ANALYSIS, cilt.40, sa.5, ss.1-40, 2024 (SCI-Expanded)
Historical masonry structures are extremely susceptible to earthquakes due to their characteristic features. Seismic
performance and corresponding damage patterns vary between these buildings. Even though the main structure
was undamaged, many minarets suffered damage or collapsed due to the transmission of large forces from the
main mass to the minaret and the abrupt changes in cross-section due to the geometry of the minaret. This study
uses an ancient masonry mosque as a case study, whose minaret and main building are constructed as a single
structure. The mosque's minaret under seismic excitation is the focus of this study. The adopted model is called
Alaeddin Bey Mosque in Muş, Türkiye. The seismic performance assessment of the minaret, considering various
retrofitting options, is mainly based on four critical parameters: base shear, acceleration, displacement, and
maximum tensile forces in all three dimensions. The analyzed retrofitting methods include base isolation located
in the basement of the mosque, viscous dampers placed only in the upper part of the minaret, Carbon Fiber-
Reinforced Polymer fabric fitted to only the minaret, and steel plates applied to only the minaret. Representative
structural models of the mosque have been modelled with SAP2000 software. The main novelty of this study is
the use of viscous dampers in the minaret. It is the first time a design methodology has been introduced for viscous
damper applications in minarets. This methodology aims to prevent local damage to the minaret due to the forces
generated by the dampers, while also considering the constraints of limited internal space within the minaret. The
finding of this study shows that viscous damper application yields significantly better results compared to the
application of Carbon Fiber-Reinforced Polymer fabric and steel plates. However, although base isolation reduces
the tensile stress values throughout the entire mosque to levels well below the material's strength, viscous damper
application in the minaret significantly reduces tensile stresses only in the minaret. As a result, viscous dampers
are recommended for damage reduction in the minaret only. Otherwise, base isolation should be considered for
reducing stress values throughout the entire mosque including the minaret. This study contributes towards the
development of new seismic retrofitting methods for historic masonry buildings ‘minaret.