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Structural Engineering and Mechanics
  Volume 64, Number 5, December10 2017, pages 653-660
DOI: http://dx.doi.org/10.12989/sem.2017.64.5.653
 


Collapse mechanism estimation of a historical slender minaret
H. Nohutcu, E. Hokelekli, E. Ercan, A. Demir and G. Altintas

 
Abstract
    The aim of this study is to accurately estimate seismic damage and the collapse mechanism of the historical stone masonry minaret \"Hafsa Sultan\", which was built in 1522. Surveying measurements and material tests were conducted to obtain a 3D solid model and the mechanical properties of the components of the minaret. The initial Finite Element (FE) model is analyzed and numerical dynamic characteristics of the minaret are obtained. The Operational Modal Analysis (OMA) method is conducted to obtain the experimental dynamic characteristics of the minaret and the initial FE model is calibrated by using the experimental results. Then, linear time history (LTH) and nonlinear time history (NLTH) analyses are carried out on the calibrated FE model by using two different ground motions. Iron clamps which used as connection element between the stones of the minaret considerably increase the tensile strength of the masonry system. The Concrete Damage Plasticity (CDP) model is selected in the nonlinear analyses in ABAQUS. The analyses conducted indicate that the results of the linear analyses are not as realistic as the nonlinear analysis results when compared with existing damage.
 
Key Words
    historical structure; masonry; operational modal analysis; concrete damage plasticity; seismic damage estimation; tall structure
 
Address
H. Nohutcu : Department of Civil Engineering, Manisa Celal Bayar University, 45140, Manisa, Turkey

E. Hokelekli : Department of Civil Engineering, Bart
 

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