A case study comparing seismic retrofitting techniques for a historically significant masonry building's minaret

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Kiral A., Ergün M., Tonyali Z., Artar M., Şentürk I.

ENGINEERING FAILURE ANALYSIS, cilt.166, sa.5, ss.1-40, 2024 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 166 Sayı: 5
  • Basım Tarihi: 2024
  • Doi Numarası: 10.1016/j.engfailanal.2024.108873
  • Dergi Adı: ENGINEERING FAILURE ANALYSIS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Communication Abstracts, Compendex, INSPEC, Metadex, DIALNET, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.1-40
  • Anahtar Kelimeler: FEM, Seismic retrofitting techniques, Masonry building's minaret, Base isolation, Viscous damper, Damper force optimization, Novel design methodology
  • Recep Tayyip Erdoğan Üniversitesi Adresli: Evet

Özet

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.