Capacity models for shear strength of exterior joints in RC frames: state-of-the-art and synoptic examination

Lima, Carmine; Martinelli, Enzo; Faella, Ciro

doi:10.1007/s10518-012-9340-4

Cited by 41 publications

(19 citation statements)

References 14 publications

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“…The capacity models briefly outlined in a companion paper (Lima et al 2012), and further investigated in the present one, are generally based on different assumptions about the basic mechanisms actually controlling shear strength in RC joints (Paulay and Priestley 1992). Moreover, they are often calibrated on experimental results and their accuracy can be hugely affected by both nature and number of those results.…”

Section: Experimental Databasementioning

confidence: 99%

“…Moreover, the tests characterised by an unknown failure mode are not taken into account. Consequently, 176 experimental tests have been actually considered for assessing the capacity models outlined in the companion paper (Lima et al 2012). …”

Section: Experimental Databasementioning

confidence: 99%

“…Those data will be employed in the next section for assessing accuracy and reliability of the capacity models outlined in Lima et al (2012). Since those models are partly or fully obtained through empirical calibrations on experimental data, it is reasonable to expect that their predictions are as accurate as they are applied to joints similar to the ones considered in their original calibration.…”

Section: Classificationmentioning

confidence: 99%

“…A comprehensive overview of capacity models currently available in the scientific literature for RC joints has been proposed in a companion paper (Lima et al 2012).…”

Section: Introductionmentioning

confidence: 99%

“…The present paper deals with assessing ten of those models chosen among the most wellestablished and widely known ones currently available in the scientific literature (Lima et al 2012). A wide number of experimental results obtained in tests carried out on exterior beamto-column joints has been collected by the authors in a wide database which is presented in Sect.…”

Section: Introductionmentioning

confidence: 99%

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Capacity models for shear strength of exterior joints in RC frames: experimental assessment and recalibration

Lima

Martinelli

Faella

2012

Bull Earthquake Eng

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Several theoretical models are currently available in the scientific literature for evaluating the shear capacity of both exterior and interior beam-to-column joints in reinforced concrete (RC) frames. A reasonably wide set of those models, based on either analytical or empirical formulations, has been summarised within a companion work. The present paper firstly presents a wide database which collects results obtained in about two-hundred experimental tests carried out on RC joints. Those results are employed for assessing the above mentioned capacity models by considering a set of experimental data much wider than those usually utilised in the original formulation of such models. Accuracy and reliability of the various models are measured by quantifying some statistical parameters actually describing the relationship between the experimental evidence and the prediction of the various capacity models under consideration. Three relevant classes of joints (namely unreinforced, under reinforced and code-compliant) are considered with the aim of emphasising that the various models perform in a rather different way when applied to those different classes. Finally, a possible recalibration of the various models is proposed with the objective of enhancing their predictive capacity with respect to both the database as a whole and the three classes of RC joints mentioned above.

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Section: Experimental Databasementioning

confidence: 99%

Section: Experimental Databasementioning

confidence: 99%

Section: Classificationmentioning

confidence: 99%

“…A comprehensive overview of capacity models currently available in the scientific literature for RC joints has been proposed in a companion paper (Lima et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Capacity models for shear strength of exterior joints in RC frames: experimental assessment and recalibration

Lima

Martinelli

Faella

2012

Bull Earthquake Eng

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Evaluation of performance of non‐invasive upgrade strategy for beam–column sub‐assemblages of poorly designed structures under seismic type loading

Sasmal

Nath

2016

Earthq Engng Struct Dyn

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Summary Beam–column sub‐assemblages are the one of the most vulnerable structural elements to the seismic loading and may lead to devastating consequences. In order to improve the performance of the poorly/under‐designed building structures to the critical loading scenarios, introduction of steel bracing at the RC beam–column joint is found to be one of the modern and implementable techniques. In the present work, a diagonal metallic single haunch/bracing system is introduced at the beam–column joints to provide an alternate load path and to protect the joint zone from extensive damage because of brittle shear failure. In this paper, an investigation is reported on the evaluation of tae influence of different parameters, such as angle of inclination, location of bracing and axial stiffness of the single steel bracing on improving the performance through altering the force transfer mechanism. Numerical investigations on the performance of the beam–column sub‐assemblages have been carried out under cyclic loading using non‐linear finite element analysis. Experimentally validated numerical models (both GLD and upgraded specimen) have been further used for evaluating the performance of various upgrade schemes. Cyclic behaviour of reinforcement, concrete modelling based on fracture energy, bond‐slip relations between concrete and steel reinforcement have been incorporated. The study also includes the numerical investigation of crack and failure patterns, ultimate load carrying capacity, load displacement hysteresis, energy dissipation and ductility. The findings of the present study would be helpful to the engineers to develop suitable, feasible and efficient upgrade schemes for poorly designed structures under seismic loading. Copyright © 2016 John Wiley & Sons, Ltd.

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Analytical Prediction of the Flexural Response of External RC Joints with Smooth Rebars

Campione

Cannella

Cavaleri

et al. 2018

Lecture Notes in Civil Engineering

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Capacity models for shear strength of exterior joints in RC frames: state-of-the-art and synoptic examination

Cited by 41 publications

References 14 publications

Capacity models for shear strength of exterior joints in RC frames: experimental assessment and recalibration

Capacity models for shear strength of exterior joints in RC frames: experimental assessment and recalibration

Evaluation of performance of non‐invasive upgrade strategy for beam–column sub‐assemblages of poorly designed structures under seismic type loading

Analytical Prediction of the Flexural Response of External RC Joints with Smooth Rebars

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