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Title: In-Plane Crack Rotation Behavior of Reinforced Concrete Panels

Author(s): Chen-hui Qian, Xiao-bing Song, and Si-jia Chen

Publication: Structural Journal

Volume: 120

Issue: 1

Appears on pages(s): 333-344

Keywords: crack rotation; modified Voigt-Reuss method; reinforced concrete panels; shear behavior at crack surface

DOI: 10.14359/51737281

Date: 1/1/2023

Abstract:
Crack direction and rotation are closely related to the mechanical behavior of concrete in a reinforced concrete panel under membrane forces. This paper focuses on situations where obvious crack rotation is likely to occur. Two basic factors causing crack rotation are analyzed by Mohr’s stress circle. One is unequal reinforcement ratio and the other is nonproportional loading. For further description of crack rotation behavior, a theoretical model based on equilibrium, compatibility, and constitutive relation is established. The shear behavior of a single concrete crack is incorporated into this model by a modified Voigt-Reuss method to describe smeared cracking in reinforced concrete panels. Two series of reinforcing bar-reinforced test panels with unequal reinforcement ratio and one series of steel plate-reinforced test panels with nonproportional loading are selected for verification. The results show that the presented model provides better prediction for the entire load-deformation response and crack rotation angles in these panels than in some prevailing models.