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RISS 인기검색어
- 검색키워드
- 저자 : Turgut Öztürk (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
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Determination of concrete quality with destructive and non-destructive methods
Hakan Kibar,Turgut Öztürk 사단법인 한국계산역학회 2015 Computers and Concrete, An International Journal Vol.15 No.3
In this study, the availability of Schmidt hammer has been investigated as a reliable method to determine the quality of concrete in irrigation networks. For this purpose, the 28-day compressive strength of concrete material used in the construction irrigation channel of Bafra lowland, which is one of the most fertile plains in Turkey was examined by means of concrete compression and as well as concrete Schmidt hammer in laboratory conditions. This study was carried out on cylindrical samples to represent the everyday concrete party (150 m3) produced by contractor firm as 3 replications. The statistical analysis of experimental data showed that the correlations between the values of 28-day compressive strength of Schmidt hammer and the rebound number was found to be 0.98. Differences of the compressive strength between compression testing and Schmidt hammer were statistically significant at P<0.01. In this context, it was found that the reliability of compressive strength of the concrete compression test are excellent, also the reliability of compressive strength of Schmidt hammer are fair in assessing the quality of concrete irrigation channels.
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The evaluation with ANSYS of stresses in hazelnut silos using Eurocode 1
Hakan Kibar,Turgut Öztürk 국제구조공학회 2014 Structural Engineering and Mechanics, An Int'l Jou Vol.51 No.1
In this study, the optimum silo dimensions for the barrel-type steel-concentrated silo with aconical outlet port usable in the hazelnut storage were investigated. Three different types of silo models as Model 1 (1635 tons), Model 2 (620 tons) and Model 3 (1124 tons) were used in the study. Varying wall thicknesses were used for Model 1 (10, 11, 12, 13, 14, 15 and 20 mm), Model 2 (10, 15 and 20 mm) and Model 3 (10, 15 and 20 mm) silos. For Model 1 silo has the most storage capacity here, to determine its optimum wall thickness, the wall thicknesses of 11, 12, 13 and 14 mm were used as different from the other models. Thus the stresses occurring in different lines with ANSYS finite element software were examined. In the study it was determined that the 10, 11 and 12 mm wall thicknesses of the Model 1 silo are not safe in terms of the stresses caused by the vertical pressure loads in the filling conditions. From the view of the filling and discharge conditions, other wall thicknesses and model silos were diagnosed to be secure. The optimum silo dimensions which won’t cause any structural problems have been found out as the Model 1 silo with a 13 mm wall thickness when the filling capacity and the maximum von Mises stresses are takeninto account. This barrel-type silo with conical outlet port sets forth the most convenient properties in hazelnut storing in terms of engineering.
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