Three-Parameter Kinematic Theory for Shear Behavior of Continuous Deep Beams

Mihaylov, Boyan; Hunt, Bradley; Bentz, Evan C.; Collins, Michael P.

doi:10.14359/51687180

Cited by 34 publications

(77 citation statements)

References 4 publications

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“…The 3PKT is based on a kinematic model with three degrees of freedom (DOFs), which is an extension of a two-parameter model for deep beams (Mihaylov et al 2013). This model describes the deformed shape of the member and links local and global deformations, which is important for addressing performance limits in the assessment of existing structures.…”

Section: Discussionmentioning

confidence: 99%

“…where the expression in the brackets is the height over which the stirrups are activated by the expansion of the web (Mihaylov et al 2013). Quantity l b1e in Eq.…”

Section: Kinematics Of Shear Wallsmentioning

confidence: 99%

“…6(b)]. The expression for the radius is adopted from the 2PKT for deep beams where the characteristic length l b1e is proportional to the width of the column loading the beam (Mihaylov et al 2013). In walls, the forces from the CLZ are defused into the foundation; therefore, the characteristic length is less clearly defined than in deep beams.…”

Section: Critical Loading Zonementioning

confidence: 99%

“…This paper presents a three-parameter kinematic theory (3PKT), which uses only three degrees of freedom (DOFs) to describe the deformation patterns of diagonally cracked walls with rectangular sections. It originates from a two-parameter kinematic theory (2PKT) for deep beams (Mihaylov et al 2013), which is extended in order to account for the shortening of the member caused by axial forces. The 3PKT approach aims to capture in a time-efficient way the complete prepeak and postpeak response of sheardominated walls, including the loss of axial load capacity.…”

Section: Introductionmentioning

confidence: 99%

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Three-Parameter Kinematic Theory for Shear-Dominated Reinforced Concrete Walls

2016

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This paper is aimed at addressing the need for physically accurate and computationally effective models for predicting the response of shear-dominated reinforced concrete walls. The presented theory is based on a three-degree-of-freedom kinematic model for the deformation patterns in walls with aspect ratios smaller than approximately 3. In the kinematic model, the wall is divided into two parts-a rigid block and a fan of struts-by a diagonal crack. The mechanisms of shear resistance across this crack are modeled with nonlinear springs to capture the prepeak and postpeak shear behavior of the member. The base section of the wall is also modeled to account for yielding of the reinforcement and crushing of the concrete. It is shown that this approach captures well the global and local deformations measured in a test specimen with detailed instrumentation. A more comprehensive validation of the theory is performed with 34 wall tests from the literature. The obtained peak load experimental-to-predicted ratios have an average of 1.03 with a coefficient of variation of 11.6%, while these values for the drift capacity are 0.99 and 16.4%.

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Section: Discussionmentioning

confidence: 99%

“…where the expression in the brackets is the height over which the stirrups are activated by the expansion of the web (Mihaylov et al 2013). Quantity l b1e in Eq.…”

Section: Kinematics Of Shear Wallsmentioning

confidence: 99%

Section: Critical Loading Zonementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Three-Parameter Kinematic Theory for Shear-Dominated Reinforced Concrete Walls

2016

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“…Over 500 tests [6] have been carried out on simply supported beams loaded with one point load within 2d of supports of which [7][8][9][10][11][12] are typical but as acknowledged by Brown and Bayrak [7] there is a scarcity of data for beams with multiple point loads. To fill gaps in the existing data, the authors tested five simply supported beams with two point loads positioned within 2d of each support (six point loading) for which BS8110 and EC2 give significantly different strength predictions.…”

Section: Introductionmentioning

confidence: 99%

Shear enhancement in RC beams with multiple point loads

Vollum

Fang

2014

Engineering Structures

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Dual potential capacity model for reinforced concrete beams subjected to shear

Lee

Han

Kim

2016

Structural Concrete

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The shear resistance mechanisms of a reinforced concrete (RC) member with shear reinforcement can be divided into the contributions of concrete and shear reinforcement. The shear resistance mechanisms of concrete can be further divided into the shear resistance of intact concrete in the compression zone, the aggregate interlock in the cracked tension zone, and the dowel action of the longitudinal tension reinforcement. In this study, the shear demand curves and potential shear capacity curves for both tension and compression zones were derived with the assumption that the shear failures of RC members are dominated by the flexural-shear strength. On this basis, the shear capacity model was also proposed. In the proposed model, the crack width and the local stress increase in reinforcements were calculated based on the bond behavior between the reinforcement and its surrounding concrete, and the crack concentration factor was introduced to consider the formation and propagation of the critical shear crack developed from the flexural cracks. A total of 940 shear test results was collected and compared with the analysis results provided by the proposed model, and it was demonstrated that the proposed model provided a good estimation on the shear strengths of RC beams.

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Three-Parameter Kinematic Theory for Shear Behavior of Continuous Deep Beams

Cited by 34 publications

References 4 publications

Three-Parameter Kinematic Theory for Shear-Dominated Reinforced Concrete Walls

Three-Parameter Kinematic Theory for Shear-Dominated Reinforced Concrete Walls

Shear enhancement in RC beams with multiple point loads

Dual potential capacity model for reinforced concrete beams subjected to shear

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