Modeling temporal variation of scouring at dual bridge piers

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Tezin Türü: Doktora

Tezin Yürütüldüğü Kurum: Orta Doğu Teknik Üniversitesi, Mühendislik Fakültesi, İnşaat Mühendisliği Bölümü, Türkiye

Tezin Onay Tarihi: 2015

Öğrenci: MERİÇ SELAMOĞLU

Eş Danışman: ALİ MELİH YANMAZ, METE KÖKEN

Özet:

Computation of temporal evolution of scour depth around bridge piers is essential for the efficient design of bridge pier footings. In this thesis, empirical scour-prediction equations and a semi-empirical model are developed to predict the temporal variation of maximum clear-water scour depth at dual cylindrical uniform piers with identical size in tandem arrangement. Experiments are conducted using different pier size, pier spacing, and flow intensities. The semi-empirical model is based on sediment continuity approach and volumetric sediment transport rate from the scour hole using a sediment pickup function. The results of the semi-empirical model are presented as design charts giving the dimensionless scour depth versus time relation, for practical use. Results of the proposed model are found to be in relatively good agreement with the experimental results, in the test range.