Study of the seismic behavior of external RC beam–column joints through experimental tests and numerical simulations

Masi, Angelo; Santarsiero, Giuseppe; Lignola, Gian Piero; Verderame, Gerardo Mario

doi:10.1016/j.engstruct.2013.02.023

Cited by 103 publications

(55 citation statements)

References 14 publications

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“…Beam-column joints equipped with deep beams were part of the same research program [5,6,7]. Based on the results of the experimental tests on wide beam-column joints, the authors calibrated a detailed finite element model in order to perform a parametric analysis to evaluate the influence of some detailing solutions on the seismic behavior of joints.…”

Section: Introductionmentioning

confidence: 99%

Finite Element Analysis of External Rc Wide Beam-Column Joints Provided With Different Detailing Solutions

Santarsiero¹,

Masi²

2017

Proceedings of the 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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Section: Introductionmentioning

confidence: 99%

Finite Element Analysis of External Rc Wide Beam-Column Joints Provided With Different Detailing Solutions

Santarsiero¹,

Masi²

2017

Proceedings of the 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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“…It is possible to obtain the maximum value of concrete contact force, C, by limiting its value to the value of compression strength (of concrete f c ) in half strut by solving Equation (27):…”

Section: Failure Modesmentioning

confidence: 99%

“…Scientific literature presents numerous experimental test results; among them, tests by El-Amoury and Ghobarah, [32], Masi et al [27], and Russo and Pauletta, [33], performed on different kinds of geometry of T-shaped joint, were selected to evaluate stress values leading to failure of the system. By using the proposed theoretical model for each geometry and each considered failure modes of the joints, the values of column shear, V c , were calculated (and named V c1 to V c11 for each considered failure mode, according to Table 1).…”

Section: Behaviour Of Proposed Model and Validationmentioning

confidence: 99%

Design Oriented Model for the Assessment of T-Shaped Beam-Column Joints in Reinforced Concrete Frames

et al. 2017

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Abstract:Beam-column joints represent very important elements of reinforced concrete (RC) structures. In fact, beams and columns, at the boundary, generate internal forces acting on concrete core and on reinforcement bars with a very high gradient. To fully understand the seismic performances and the failure modes of T-shaped beam-column joints (external corner-positioned) in RC structures, a simplified analytical model of joint behaviour is proposed and theoretical simulations have been performed. The model is based on the solution of a system of equilibrium equations of cracked joint portions designed to evaluate internal stresses at different values of column shear forces. The main aim of the proposed model is to identify the strength hierarchy. Limit values of different internal stresses allow us to detect the occurrence of different failure modes (namely the failure of the cracked joint, the bond failure of passing through bars, and the flexural/shear failures of columns or beams) associated with column shear forces; the smaller one represents the capacity of the joint. The present work, focusing on T-shaped joints, could represent a useful tool for designers to quantify the performance of new structures or of existing ones. In fact, such a tool allows us to push an initial undesired failure mode to a more appropriate one to be evaluated. Finally, some experimental results of tests available in literature are reported, analysed, and compared to the predictions of the proposed model (by means of a worked example) and of some international codes. The outcomes confirm that failure modes and corresponding joint capacities require an analytical model, like the proposed one, to be accurately predicted.

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“…A proper quantity of transverse reinforcement allows the stresses to be appropriately transmitted between the beams and columns. Nonetheless, the deficiency of transverse reinforcement in joint panels occurs often in structural systems designed for gravity loads or according to outdated seismic codes (Masi et al) [3]. Hence, current research efforts concentrated on developing cost-effective and sound retrofit techniques and strategies by means of composite materials.…”

Section: Introductionmentioning

confidence: 99%

Simplified Model for Strengthening Design of Beam–Column Internal Joints in Reinforced Concrete Frames

et al. 2015

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The beam-column joints are very restricted areas in which the internal forces, generated by boundary elements, act on the concrete core and reinforcing bars with a very high gradient. They are the link between horizontal and vertical structural elements, and therefore, they are directly involved in the transfer of seismic forces. Thus, they are crucial to study the seismic behavior of reinforced concrete (RC) structures. To fully understand the seismic performances and failure modes of beam-column joints in RC buildings, a simplified analytical model of joint behavior is proposed and theoretical simulations are performed. The aim of the model, focusing on internal perimetric joints, is to identify the strength hierarchy in terms of capacity for different failure modes (namely failure of cracked joint, bond failure of passing through bars, flexural/shear failures of columns or beams). It could represent a tool for the designers of new joints to quantify the performance of new structures, but also as a tool for the designers of external strengthening of existing joints in order to calculate the benefits of the retrofit and pushing the initial failure to a more desirable failure mode. Further, some experimental results of tests available in the scientific literature are reported, analyzed and compared.Polymers 2015, 7 1733

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Study of the seismic behavior of external RC beam–column joints through experimental tests and numerical simulations

Cited by 103 publications

References 14 publications

Finite Element Analysis of External Rc Wide Beam-Column Joints Provided With Different Detailing Solutions

Finite Element Analysis of External Rc Wide Beam-Column Joints Provided With Different Detailing Solutions

Design Oriented Model for the Assessment of T-Shaped Beam-Column Joints in Reinforced Concrete Frames

Simplified Model for Strengthening Design of Beam–Column Internal Joints in Reinforced Concrete Frames

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