Numerical assessment of a slender structure damaged during October 30, 2020, İzmir earthquake in Turkey
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2021
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Abstract
The minarets, which have a tall and slender structure, are quite vulnerable to dynamic forces, i.e. earthquakes and winds. In mainly concrete minarets, since the bond between the concrete blocks is provided by only mortar, the damages caused by high tensile stresses may emerge. This study aims to simulate the behaviour of the concrete Selimiye minaret damaged during the İzmir (Seferihisar-Samos) earthquake on October 30, 2020. The nonlinear finite element model of the Selimiye minaret is created using the Concrete Damage Plasticity failure model. In the nonlinear time history analyses, the İzmir earthquake records obtained from the Bayraklı station, located the closest to the minaret, are used. The damages occurring in the transition segment of the minaret are verified with the finite element method. This study also aims to strengthen insufficient concrete minarets with an innovative, cost-effective, and better workability method. The proposed strengthening method is based on a Fabric Reinforced Concrete Mixture. Finite element models are strengthened from the inner surface using Fabric Reinforced Concrete Mixture composites reinforced with glass and steel fibers. As a result of the finite element analyses, it is concluded that the concrete minarets can be strengthened from the inner surface with the Steel Fabric Reinforced Concrete Mixture method in safety. In addition, with a parametric study, it has been determined that partial strengthening applications, which are more economical and aesthetic, can be more effective on structural performance than full strengthening applications. © 2021, The Author(s), under exclusive licence to Springer Nature B.V.
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Turkey , Meleagris gallopavo , Concrete blocks , Concrete construction , Concrete mixtures , Cost effectiveness , Earthquakes , Fiber reinforced concrete , Finite element method , Mixtures , Reinforced plastics , Steel fibers , Strengthening (metal) , Towers , Earthquake records , Non-linear finite element model , Nonlinear time history analysis , Parametric study , Partial strengthening , Slender structures , Strengthening methods , Structural performance , assessment method , earthquake , earthquake damage , Kocaeli earthquake 1999 , numerical model , structural phenomena (geology) , tensile stress , vulnerability , Failure (mechanical)