Cyclic Shear-Friction Constitutive Model for Finite Element Analysis of Reinforced Concrete Membrane Elements

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Title: Cyclic Shear-Friction Constitutive Model for Finite Element Analysis of Reinforced Concrete Membrane Elements

Author(s): Migeum Chorzepa, Yoo Jae Kim, Gun Jin Yun, Thomas G. Harmon, and Shirley Dyke

Publication: Structural Journal

Volume: 108

Issue: 3

Appears on pages(s): 324-331

Keywords: crack strain; cyclic; finite element analysis; reinforced concrete;membrane; shear-friction

Date: 5/1/2011

Abstract:
This paper develops a shear-friction membrane model that is able to limit the shear strength of concrete crack surfaces according to the shear-friction theory so that concrete can fail in shear. The proposed shear-friction model is developed for membrane elements with one-directional cracks and is validated with experimental results available in the literature. Based on experimental observations, this paper introduces the concept of the friction coefficient relative to the “crack opening path,” which is the relationship between the crack slip and the crack separation when the cracks are in contact and slipping without developing normal or shear stresses on the sliding concrete crack surface. The shear friction model rationally predicts failure due to shear transfer across cracks and is able to capture the fundamental behavior of crack slip and separation associated with shear transfer across cracks in reinforced concrete.