Yüksek Dayanım Ve Şekil Değiştirme Özellikli Çeliklerin Kolon Kesitinde Donatı Olarak Kullanımı

Konferans Bildirisi -- Teorik ve Uygulamalı Mekanik Türk Milli Komitesi, 2013Conference Paper -- Theoretical and Applied Mechanical Turkish National Committee, 2013Bu çalışmada yüksek dayanım ve şekildeğiştirme özellikli çeliklerin betonarme kolon kesitinde donatı olarak kullanımı analitik olarak incelenmiştir. Çalışma kapsamında analitik olarak, yüksek dayanım ve süneklik özelliklerine sahip olan, “YSÇ” adı verilmiş betonarme çeliği kullanılarak analitik olarak tanımlanan betonarme kolonların, davranışı, ülkemizin inşaat mühendisliği yapılarında yaygın olarak kullanılan BÇIIIa betonarme çeliği ile üretilmiş elemanlar ile karşılaştırılmıştır. 1/3 ölçekli betonarme kolonların YSÇ ve BÇIIIa çelikleri ile üretilmiş olan kuramsal modelleri, COLA (Reinforced Concrete Column Analysis) programına tanımlanarak, bu program yardımıyla kesitlerin moment-eğrilik, yatay yük yerdeğiştirme ve enerji tüketme davranışları incelenmiş ve 2 farklı tip çeliğin kullanım durumunun, kesit davranışına etkileri karşılaştırılmıştır. Özellikle, “YSÇ” ile üretilen betonarme kolonlarda dayanım ve süneklik özellikleri ile birlikte, deprem performansı açısından önemli olan enerji tüketim kapasitesinin irdelenmesi amaçlanmış, analizler sonucunda YSÇ ve BÇIII çeliklerini içeren betonarme elemanlar, bu parametreler gözönünde bulundurularak karşılaştırılmıştır.One of the most important characteristics of a structure which is in earthquake regions is its ductility. A better ductile behavior can be achieved by constructing these structures with elements which have high energy absorption capacities during moderate and strong earthquakes. For reinforced concrete structures the deformation capability and strength of structural steel as reinforcement has an important contribution on the entire behavior of the reinforced concrete member. In this study, use of a type of steel as reinforcement in reinforced concrete members which features high deformability capacity and high yielding strength(≈540 MPa), is analyzed analytically. These studies contain section analysis for reinforced concrete members with high strength and BCIII steel generally used in building industry of Turkey. All the analytical studies are carried out with a software called COLA (Reinforced Concrete Column Analysis). It has been found that reinforced concrete columns reinforced with high strength steel reached bigger moment and lateral load carrying capacities in comparison with the ones which are reinforced with BCIII

Consumer taste uncertainty in the context of store brand and national brand competition

In this paper, we focus on the uncertainty in consumer taste and study how a retailer can benefit from acquiring that taste information in the presence of competition between the retailer's store brand and a manufacturer's national brand. In this context, we also identify the optimal information sharing strategy of the retailer with the manufacturer as well as the equilibrium product positioning and pricing of the two brands. We model a competitive setting in which there is ex-ante uncertainty about consumer preferences for different product features and the retailer has a distinct advantage in terms of resolving this uncertainty, given his close proximity to the consumers. We identify two important effects of retailer's information acquisition and sharing decisions about consumer taste. The direct effect is that having taste information allows the retailer to make better SB introduction and positioning decisions. The indirect effect is that information sharing enables the manufacturer to make better NB positioning decisions - which in return may benefit or hurt the retailer. Furthermore, we show that these effects interact with each other and the nature of their interaction depends on three external factors: relative popularity of different product features, the vertical differentiation between the two brands, and the cost of store brand introduction. This interaction is most striking when the store brand introduction is not very costly. In this case, if one of the features is quite popular, then the retailer voluntarily shares information with the manufacturer because the indirect effect augments the value of the direct effect - even though this increases the competition between the brands. Otherwise, the retailer refrains from information sharing because the indirect effect then diminishes the value of the direct effect. We also generate managerial insights as to when it is most valuable for the retailer to acquire taste information as well its worth for the manufacturer

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Characterization and modification of antioxidant proteins from plat materials

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