A theoretical method for calculating the compressive arch capacity of RC beams against progressive collapse

Abbasnia, Reza; Nav, Foad Mohajeri

doi:10.1002/suco.201400119

Cited by 21 publications

(7 citation statements)

References 16 publications

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“…Subsequently, the beam elongates under the increment of the applied loads, however, the restraint by other members leads to the occurrence of compression arch action in the beam-column assemblage. The arching action in addition to the beam axial forces are shown in Fig.1 [19], where the interior column consumes its bearing capability. Compression arch action mechanism in the beam-column assemblages is associated with axial compression forces.…”

Section: Assumptionsmentioning

confidence: 99%

Simplified Compression Arch Action Model for R/C Beam-column Assemblages

Beshara

Mahmoud

El-Mahdy

et al. 2019

JERR

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A set of analytical equations are developed for calculating the beam-column assemblage flexure action capacity and compression arching action capacity under a middle column removal scenario. The suggested equations covered most of the main parameters affecting the assemblage behavior including seismic detailing, longitudinal reinforcement ratios, concrete confinement, and the contribution of concrete flanged slabs. The proposed analytical model for predicting the flexural and compression arching action capacities is validated with a large number of experimental results. The model provides a good estimation for 79 beam-column assemblages with several geometrical, reinforcement configurations, and material parameters. The mean values of the experimental to the theoretical ratio for calculating flexure and compression arching capacities are 1.15 and 1.16, respectively. The predictions of previous compression arch action models are found to be more conservative. Finally, the proposed model is utilized in parametric studies including all key parameters that affected resistance of the beam-column assemblages against progressive collapse.

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Section: Assumptionsmentioning

confidence: 99%

Simplified Compression Arch Action Model for R/C Beam-column Assemblages

Beshara

Mahmoud

El-Mahdy

et al. 2019

JERR

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“…Ultimate membrane capacity of one way slabs could be calculated based on the arching deformation theory (Rankin and Long, 1997). This concept is developed previously for obtaining the arching capacity of RC beams (Abbasnia and Mohajeri Nav, 2016). The mentioned procedure is utilized here in order to calculate the ultimate vertical load corresponding to the arching capacity of a RC sub-assemblage ( P B )…”

Section: Concept Of the Theoretical Modelmentioning

confidence: 99%

Analytical investigation of reinforced concrete frames under middle column removal scenario

Nav

Usefi

Abbasnia

2017

Advances in Structural Engineering

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A simplified theoretical model is developed in the present study in order to predict the general behavior and resistance of reinforced concrete frames under column removal scenarios. The proposed model defines the load-deflection response of the middle joint above the removed column based on a four-stage procedure: classical beam mechanism stage, arching stage, transient stage, and catenary stage. A comprehensive evaluation study using two validation approaches is performed in order to investigate the reliability of the introduced model. For validation of theoretical model, the results of a comprehensive finite element method and experimental data were utilized and the results were compared with the theoretical model. The results demonstrated that the proposed theoretical procedure can establish a reliable foundation for progressive collapse assessment of reinforced concrete frame structures. The proposed model can also predict behavior of symmetrical frames, and this was validated by good agreement between finite element results and the results of the proposed numerical model.

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“…The numerical analysis carried out by Qi et al [16] to determine the dynamical response of CRC exposed to blast loading, the results indicated that the zone near the explosion has large local deformations with great damaged. Based on a theoretical study, Abbasnia and Nav [17] presented the procedure to estimate the structural robustness and also the arching capacity of beams. Additionally, through activating three-dimensional finite element approach of an actual existing deck-type reinforced concrete arch bridge, Farahani and Maalek [18] referred that the influences of the vertical component of ground motion must be included in the analysis of such construction.…”

Section: Introductionmentioning

confidence: 99%

Behavior of Laminated Reinforced Concrete Curved Beam with Changing Concrete Properties

2019

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Strengthening and upgrading the performance reinforced concrete curved structures for functional purpose as well as for conversation of architectural aesthetic aspect is the main concern for engineers. In the present study, four full-scale experimental Curved Reinforced Concrete (CRC) beams conducted. The cross-section of all CRC beams was T-section. The parametric studies are carried out to investigate the effect of time of casting segmental layers (web and flange) and the compressive strength of concrete on the structural behavior of such structures. Three values of compressive strength of concrete used in this study, these are (25, 50, 75 MPa). The control specimen casting as one unit with the compressive strength of concrete was 25 MPa. The present outcomes showed that the increase in the compressive strength of concrete up to 75 MPa of the flange zone plays a significant role in raising the ultimate capacity by 22.86% and reducing the deflection by 61.43% in the quarter span as compared with control specimen. Additionally, the trend and distribution of cracks, mode of failure, and strain response of CRC specimens are briefly discussed in this study.

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A theoretical method for calculating the compressive arch capacity of RC beams against progressive collapse

Cited by 21 publications

References 16 publications

Simplified Compression Arch Action Model for R/C Beam-column Assemblages

Simplified Compression Arch Action Model for R/C Beam-column Assemblages

Analytical investigation of reinforced concrete frames under middle column removal scenario

Behavior of Laminated Reinforced Concrete Curved Beam with Changing Concrete Properties

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