A Simplified Shear Strength Evaluation Model
For Reinforced Concrete Corbels
Author(s)
J. K. Lu, S. Y. Kuo, J. Y. Lin & S. H. Hsu
Abstract
A shear strength model for reinforced concrete corbels is developed by
modifying the softened strut-and-tie model. Using the concept of Lu and Wu, the
constitutive equation is developed. Then, the constitutive equation is combined
with the equilibrium equations of Hwang and Lee. The model is used to predict
the shear strength of reinforced concrete corbels. The results of the model are
compared with the experimental data and the results of ACI code.
Keywords: softened strut-and-tie model, reinforced concrete corbels, shear
strength.
1 Introduction
Corbels are cantilevers having shear span-to-depth ratios not greater than unity,
which tend to control by shear as a deep beam, rather than flexural members.
Reinforced concrete corbels are becoming a common feature in building
construction. Simple design procedures to produce safe and economic corbels are
therefore required. Much research is carried into investigation about the shear
strength of corbels.
In test, the most common modes of failure of corbels are crushing or splitting
of the compression strut. ACI 318-95 [3] used the shear-friction method to
calculate the shear capacities of corbels. It is shown that most of the shear
capacities of corbels calculated by ACI code are underestimated [4–6].
ACI 318-02 [7] provides the strut-and-tie model as an alternate method to
Keywords
softened strut-and-tie model, reinforced concrete corbels, shear
strength.
Related Book
Other papers in this volume
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