Betonarme Yapı Elemanları için Güvenilirliğe Dayalı Yeni Yük ve Dayanım Katsayılarının Belirlenmesi

Bu çalışmada, yaşanan büyük depremlerden sonra Türkiye’de değişen tasarım ve uygulama koşullarına dayalı olarak, betonarme yapı elemanları için yeni yük ve dayanım katsayıları belirleme yöntemi sunulmuştur. Yöntemin uygulaması kesme göçme modundaki kirişlere etkiyen sabit ve hareketli yük kombinasyonu için gerçekleştirilmiştir. İlk önce güvenilirlik analizi yapmak için elde edilen veriler göz önünde bulundurularak, tasarım değişkenlerinin sahip olduğu belirsizlikler istatistiksel parametreler ile sayısallaştırılmıştır. Daha sonra, tasarım koşullarına dayalı risk düzeyleri güvenilirlik indeksi, β, cinsinden hesaplanmıştır. Hesaplanan bu β değerleri göz önünde tutularak hedef güvenilirlik indeksi, βT, uygun bir şekilde seçilmiştir. Son olarak, seçilen güvenilirlik indeksi kullanılarak yük ve dayanım katsayıları Geliştirilmiş Birinci Mertebe İkinci Moment yöntemine göre hesaplanmıştır

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Determination of Reliability Based New Load and Resistance Factors for Reinforced Concrete Structural Members In this study, a procedure for the determination of new load and resistance factors for reinforced concrete structural members is proposed in view of the fact that the design practice in Turkey has changed after the occurrence of major earthquakes. The implementation of the procedure is carried out for the shear failure mode of reinforced concrete beams subjected to dead and live load combination. First, the statistical parameters for the quantification of uncertainties involved in the design variables are assessed based on the available data. Then, the level of risk related with the current design practice is quantified in terms of the reliability index, β. Target reliability index, βT, is selected in view of the β values computed for the current design practice. By using the resulting target reliability index, βT, the load and resistance factors are computed based on the Advanced First Order Second Moment Method

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