Numerical modeling the effect of an opening on the behavior of exterior beam-column connections under cyclic loading

Amin, S.; Elwan, Sherif; Elzeiny, S. M.; Hamad, M.; Deifalla, Ahmed Farouk

doi:10.1016/j.jobe.2021.102742

Cited by 9 publications

(5 citation statements)

References 27 publications

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“…Research in the area of structural engineering has delved into the potential of fiberreinforced polymers (FRPs) for strengthening various structural elements [4,[20][21][22][23][24][25][26][27][28][29][30][31]. One innovative approach, studied by X. F. Nie et al [25], was termed flexural weakening-shear strengthening.…”

Section: Strengthening Of Rc Beam With Web Opening Using Frpmentioning

confidence: 99%

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Review of the Structural Performance of Beams and Beam–Column Joints with Openings

Galustanian,

El-Sisi,

Amer

et al. 2023

CivilEng

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The need for openings in RC structures has increased, but their presence significantly affects the performance and strength of the structures. While small openings can be managed with additional reinforcement, dealing with large openings in reinforced or pre-stressed concrete members is challenging due to the lack of technical information and specific guidelines. This research provides an up-to-date overview of RC beam–column joints that incorporate web openings and evaluates appropriate strengthening methods. The research discusses the classification of openings in RC beams, considering factors such as size and shape. Additionally, it examines the failure modes of RC beams in relation to flexural and shear behavior when web openings are present. The research also provides a comprehensive review of various strengthening techniques, outlining their advantages and disadvantages. In conclusion, larger openings in beams result in reduced strength, while increasing loads lead to higher deflection, strain, and cracking until failure. Openings are classified as small or large based on their impact on beam behavior. Multiple smaller openings are preferred over a single large opening when size becomes excessive. Optimal placement is in the middle of the section to ensure adequate concrete coverage for the chords. Sufficient concrete and depth are essential for ultimate compression during bending and effective shear reinforcement.

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Section: Strengthening Of Rc Beam With Web Opening Using Frpmentioning

confidence: 99%

“…Amin et al [21] developed a numerical model to predict the performance of beamcolumn connections (BCCs) with nearby web openings under cyclic loading. The model was validated using experimental results and other numerical models.…”

Section: Beam-column Joints With Opening Under Cyclic Loadingmentioning

confidence: 99%

Review of the Structural Performance of Beams and Beam–Column Joints with Openings

Galustanian,

El-Sisi,

Amer

et al. 2023

CivilEng

View full text Add to dashboard Cite

show abstract

“…In addition, the columns are subjected to concentric or nonconcentric compressive forces, which are areas of extensive research studies using various experimental, numerical, or artificial intelligence methods [5][6][7][8]. Moreover, numerical modeling has shown a lot of promise in the area of composite elements under various loadings [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Parametric Study on the Behavior of Steel Tube Columns with Infilled Concrete—An Analytical Study

et al. 2022

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Concrete-filled steel tube (CFST) columns are used in tall buildings and bridges, and they provide more rigidity and higher bearing capacity, but buckling affects their behavior. There is an exceptional need to study the behavior of these columns under various conditions. The numerical method is beneficial in supplementing the experimental works and is used to explore the effects of various parameters because of the limitations in cost, apparatus, and time of the experimental program. The various parameters, such as the different slenderness ratios, i.e., column-height-to-cross-section-dimension (H/D), different steel-tube-thickness-to-column-dimension (D/t), and different compressive strength of concrete to yield strength of steel tube ratio (fc/fy) under concentric axial loading are considered in this current study. Firstly, a finite element model used the “ANSYS” software program and was constructed to validate the results of the experimental works. The extensive numerical models were carried out to extensively widen the study in this field. The numerical work was conducted on sixty-four specimens. Moreover, the analytical calculations from the different international codes/standards were compared with the numerical results to test their reliability in predicting the ultimate carrying loads. The study provided results that show the improvement effect of CFST columns with the high compressive strength of infilled concrete, while no remarkable enhancement effect with the high yield strength of steel tube was observed. Increasing the columns’ diameter is more effective in enhancing the load capacity (about three times more) than increasing the tube thickness (about 1.3 times). Ring stiffeners for long CFST columns (H/D > 12) do not lead to any enhancement of the column behavior due to yielding occurring firstly at the location of the rings. ECP205-2007 is the most conservative design code in predicting the load capacity of CFST columns, while the AIJ design code is good at predicting the ultimate load failure compared to the other codes/standards. Eurocode 4 provides underestimation values of the load-carrying capacity of CFST columns.

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“…More recent studies (Saleh et al, 2021) focused on the effect of web openings, often required by electromechanical layouts, on the performance of exterior joints under cyclic loading. These authors found that openings in the beams generally lead to a decrease in cracking and ultimate strengths and stiffness, due to opening proximity to support, opening aspect ratio, and opening reinforcements.…”

Section: Introduction and Research Backgroundmentioning

confidence: 99%

A Nonlinear Macro-Model for the Analysis of Monotonic and Cyclic Behaviour of Exterior RC Beam-Column Joints

et al. 2021

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The study presents a numerical investigation on exterior reinforced concrete (RC) beam-column joints under seismic actions based on a macro-modelling approach proposed by the authors in a recent paper. The followed approach makes use of the well-known “scissors model” where two nonlinear rotational springs arranged in series were introduced to schematize the shear behavior of the joint panel and, moreover, the possible occurrence of the debonding of longitudinal steel rebars at the beam-joint interface. In this paper, the scissor model is employed in the context of a novel predictive approach with the twofold objective to: 1) develop a new model for the estimate of the maximum shear strength of RC joints by performing a multivariate linear regression analysis on a set of experimental tests and, 2) define a new multilinear backbone joint shear stress-strain law to be assigned to one of the mentioned springs. In particular, the identification of the shear strain parameters is obtained by performing a sensitivity analysis in which a number of monotonic load-drift numerical curves are derived by varying the strain values in ranges opportunely a-priori defined and compared with the experimental ones to investigate their accuracy. Finally, cyclic analyses on RC joints collected in the experimental database are carried out by considering the backbone joint shear stress-strain law identified in the calibration process. The analyses are performed by using the nonlinear open-source finite element platform, OpenSees, in which the “pinching4” uniaxial material model, available in the software library, is implemented to set the parameters governing the hysteresis rules and pinching effect. To this purpose, five literature proposals suggesting the values to use for such parameters are taken into account and their assessment is presented in the paper. The obtained outcomes have allowed, on the one hand, to identify the proposal providing the best numerical simulations of the experimental results and, on the other end, to draw useful indications on how to further improve the cyclic modelling by opportunely modifying the setting of the “pinching4” material model parameters.

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Numerical modeling the effect of an opening on the behavior of exterior beam-column connections under cyclic loading

Cited by 9 publications

References 27 publications

Review of the Structural Performance of Beams and Beam–Column Joints with Openings

Review of the Structural Performance of Beams and Beam–Column Joints with Openings

Parametric Study on the Behavior of Steel Tube Columns with Infilled Concrete—An Analytical Study

A Nonlinear Macro-Model for the Analysis of Monotonic and Cyclic Behaviour of Exterior RC Beam-Column Joints

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