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http://dx.doi.org/10.4334/JKCI.2006.18.3.379

Shear Behavioral Model based on Shear Deformation Compatibility in Reinforced Concrete Members  

Kim, Woo (Dept. of Civil Engineering, Chonnam National University)
Rhee, Chang-Shin (Dept. of Civil Engineering, Chonnam National University)
Jeong, Jae-Pyong (Dept. of Civil Engineering, Chonnam National University)
Publication Information
Journal of the Korea Concrete Institute / v.18, no.3, 2006 , pp. 379-388 More about this Journal
Abstract
This paper presents a model for evaluating the contribution by arch action to shear resistance in shear-critical reinforced concrete beams. Based on the relationship between shear and bending moment in beams subjected to combined shear and bending, the behavior of a beam is explicitly divided into two base components of the flexural action and the tied arch action. The compatibility condition of the shear deformation that deviates from Bernoulli bending plane is formulated utilizing the smeared truss idealization with an inclined compression chord. The Modified Compression Filed Theory is employed to calculate the shear deformation of the web, and the relative axial displacements of the compression and the tension chord by the shear flow are also calculated. From this shear compatibility condition in a beam, the shear contribution by the arch action is numerically decoupled. Then the validity of the model is examined by applying the model to some selected test beams in literatures. The results may confirm the rationale of the proposed behavioral model.
Keywords
arch action; compatibility; reinforced concrete beam; shear; truss model;
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