A REVIEW ON SHEAR FRICTION MODELS
Ramyasree G
PG Scholar, Dept. of Civil Engineering, Kakatiya Institute of Technology and Science, Warangal, India , IN
Dr L Sudheer Reddy
PG Scholar, Dept. of Civil Engineering, Kakatiya Institute of Technology and Science, Warangal, India , IN
Sumanth Kumar B
PG Scholar, Dept. of Civil Engineering, Kakatiya Institute of Technology and Science, Warangal, India , IN
Keywords: Interfacial shear strength, shear friction theory, longitudinal shear strength, cohesion, friction, dowel action
Abstract
The strength of the interfacial shear between concrete cast at different times is of great importance for ensuring the consistent behaviour of RC composite elements. Prefabricated beams with monolithic slabs, bridge decks reinforced by adding a new layer of concrete, repairing and reinforcing existing concrete structural elements by adding a new layer of concrete is examples of reinforced concrete composite elements. This article briefly discusses several approaches to predicting the shear strength of a reinforced concrete beam. The shear friction theory/model is one of the approaches adopted in design standards for predicting strength under longitudinal shear between concrete elements cast at different times and same time. This article presents a review of the literature on structural expressions for shear friction, such as the innovative concept of the friction shear theory, proposed by Birkeland and Birkeland in 1966. A “modified version” was proposed by Mattock and Hawkins in 1972; Incorporation of concrete strength in 1978 by Loov; the “sphere model” developed by Walraven in 1987; and considering all effects like the influence of cohesion, friction and dowel action are specifically identified by Randl in 1997.
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