Reference : Three-parameter kinematic approach for shear behaviour of short coupling beams with c...
Scientific journals : Article
Engineering, computing & technology : Civil engineering
http://hdl.handle.net/2268/221361
Three-parameter kinematic approach for shear behaviour of short coupling beams with conventional reinforcement
English
Mihaylov, Boyan mailto [Université de Liège - ULiège > Département ArGEnCo > Structures en béton >]
Franssen, Renaud mailto [Université de Liège - ULiège > Département ArGEnCo > Structures en béton >]
2018
fib Bulletins
85
Towards a rational understanding of shear in beams and slabs
Yes
International
[en] short coupling beams ; shear ; diagonal tension failure ; kinematic model ; strut-and-tie
[en] This paper presents a three-parameter kinematic theory (3PKT) for predicting the shear strength and deformation patterns of short coupling beams. The 3PKT approach is situated between simple and conservative strut-and-tie models and complex nonlinear finite element (FE) models. It is aimed at improving the strength predictions of strut-and-tie models while maintaining relative simplicity and clear physical basis. In addition, it is aimed at providing estimates of the ultimate deformations in coupling beams which are typically calculated with FE models. While FE models use a large number of degrees of freedom (DOFs) to describe the deformation patterns in coupling beams, the 3PKT is based on a kinematic model with only three DOFs. In addition to kinematic conditions, the 3PKT also includes equilibrium equations and constitutive relationships for the mechanisms of shear resistance in short coupling beams. The paper presents the formulation of the 3PKT and compares its shear strength predictions to results from tests, FE simulations, and strut-and-tie models based on the fib Model Code 2010. It is shown that the 3PKT approximates well the predictions of the FE models while the strut-and-tie model produces significantly lower strengths.
http://hdl.handle.net/2268/221361

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