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Seismic Risk Assessment of Historical Eastern Turkish Buildings by Finite Element Analysis

100%
Çarhoglu A., Usta P., Korkmaz K.
Acta Physica Polonica A
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2015
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vol. 127
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issue 4
1083-1085
EN
Traditional masonry buildings, commonly built in Turkey, are one of the important items of cultural heritage. There are many important historical buildings in the east part of Turkey. One of the important locations in east of Turkey is Kilis. In this study, Kilis houses of original types in terms of architectural and functionality, were examined regarding the effects of an earthquake. Therefore, five traditional Kilis houses were examined and the buildings were modeled using SAP2000 finite element software. The models were investigated with different materials such as stone, brick, pumice and cellular concrete material. Time history analyses were performed for the modeled buildings, with three different ground motion records. Displacement values, compressive stresses, tensile stresses, shear stresses and base shear values, obtained from the analysis results were examined in detail. When the results of the study were evaluated, earthquake resistance of buildings was was found to be high and the displacements values were not at a significant level.
2
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A Study on Modification of Micro-Alloy Steel Surfaces with Different Hard Materials Via Electro-Spark Deposition Method

100%
Çakir A., Yilmaz M., Ribalko A., Korkmaz K.
|
EN
In this study, micro alloy steel (St 35) surfaces, which were coated with different hard alloy electrode materials via Electro Spark Deposition (ESD) method, have been characterized. The electrode materials were chosen among hard alloys such as; TiCN(Ni), CrC-NiCr, WC(Co) and TiWC(Co). During the ESD experiments, the following pulse parameters in a group were used: pulse current amplitude, pulse duration, electrical charge of 100-200 A, 100 μs, 1000 mC respectively. The surface roughness, thickness of coatings, cross sectional microstructure analysis, phase analysis, micro hardness and adhesion properties of the coated samples were characterized by profilometer, SEM (EDX), XRD, micro hardness tester and scratch adhesion tester respectively.
3
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Fabrication of Bioactive Coatings on Steel Substrates by Electro-Spark Deposition (ESD) and Micro-Arc Oxidation (MAO) Methods

100%
Yilmaz M., Çakir A., Ribalko A., Korkmaz K.
Acta Physica Polonica A
|
2015
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vol. 127
|
issue 4
1277-1281
EN
In the present study, first Ti6Al4V alloy was deposited on steel (AISI 1060) surfaces by using ESD method. The optimum electrical parameters for the coating process were investigated to obtain high quality coatings. Then, in order to gain bio-compatibility and obtain second layer, which was coated with hydroxyapatite (HAp), MAO technique was applied on the present coating. Resulting duplex layers were characterized with X-ray diffraction (XRD) and scanning electron microscopy (SEM) with energy dispersive X-ray spectroscopy (EDX) analysis together with surface roughness, coating thickness, scratch tests and hardness tests.
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