A proposed model for nonlinear analysis of RC beam-column joints under seismic loading

Zhao, Wentong; Yang, Hong; Jinfeng, Chen; Sun, Panxu

doi:10.1016/j.engstruct.2018.09.068

Cited by 25 publications

(6 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Shear cracks were observed in the RC sections of the specimens while the flexural cracks behavior of the ECC sections was insignificant due to its high shear strength. Zhao et al, (2019) introduced a novel macro beam-column joint element model that incorporates the effects of the joints inelastic deformation specifically for the internal joints containing stirrups. The macro-RCBC joints were formulated by considering the force transmission mechanisms and inelastic response mechanisms.…”

Section: Joints Subjected To Seismic Loadingmentioning

confidence: 99%

Revisiting the Versatility of Seismic Load-enabled Reinforced Concrete Beam Column Linkage

Aljabbri,

Karim,

Majeed

2024

IAJSE

View full text Add to dashboard Cite

In the seismic load-facilitated (vertical and lateral) reinforced concrete beam-column (RCBC), strong linkages are vital to protect the integrity of any civil structure foundation. Compared to other structural components, these joints often collapse during an earthquake in the seismic locations due to plastic-hinge zone mechanism. Most of the earlier reports on these issues mainly focused on two-dimensional RCBC joints and seldom emphasized on the need of three-dimensional RCBC linkages. Based on this fact, we critically overviewed several recent-state-of-the-art studies carried out on the improvement of RCBC linkages subjected to seismic loading. A careful evaluation of these articles revealed that the factors like shear strength (SS), failure, processing and selection of materials, as well as methods of strengthening (MS) of these RCBC joints are responsible for the collapse. It is established that for low axial load the ductility and bending resistance of the column must be enhanced to strengthen the RCBC links, enabling the diagonal strips or bars more robust than vertical ones and vice versa. Briefly, this article may provide the taxonomy for navigating the researchers into this field, leading to future sustainable development in the civil engineering construction sectors.

show abstract

Section: Joints Subjected To Seismic Loadingmentioning

confidence: 99%

Revisiting the Versatility of Seismic Load-enabled Reinforced Concrete Beam Column Linkage

Aljabbri,

Karim,

Majeed

2024

IAJSE

View full text Add to dashboard Cite

show abstract

“…Zhao et al [60] examined a macro BCJ element technique to deliberate the consequence of joint inelastic deformations aimed at an internal joint with stirrups. The force transfer methodologies and inelastic response methodologies were regarded for the evolvement of macro BCJ, utilizing axial springs demonstrating the barslip technique of longitudinal reinforcement, concrete, and reinforcement on the interface-shear together with joint core.…”

Section: Column Axial Load Ratiomentioning

confidence: 99%

Influencing Parameters of Exterior Reinforced Concrete Beam-Column Joint Shear Strength: A Depth Review of Recent Advances

2022

IJE

View full text Add to dashboard Cite

Beam-Column Joints (BCJ) manage the structural behaviour and failure mechanisms under severe events, blast, earthquakes, and impacts. Thus, they are the critical constituents in a building. Disparate deficiencies, say beam weak on flexure, shear, and column weak in shear, are present in this joint assembly to account for limits in design rule. To analyze the Reinforced Concretes (RC) Beam-Column (BC) connections behaviour, systematic research was performed amid the past '20' years. The influence parameters in favor of the Shear Strength (SS) of external RC-BCJ are investigated here. (a) The Concretes Compressive Strength (CCS), (b) confinement joint by the beam, (c) anchorage length, (d) beam and column reinforcement, and (e) the columns axial load are the '5' main parameters intended for the joint SS, which is found through the outcome. The most considerable correlation to the joint SS was found with the CCS amongst the influence aspects. This study reveals the vital features of the RC-BCJ shear strength.

show abstract

“…Nowadays, a large consensus has not been found on a single joint modelling technique neither in the scientific literature nor in Codes, although many research groups worldwide, during the last three decades, performed wide experimental and theoretical studies on this topic, to evaluate the behaviour of beam-column joints [40,41].…”

Section: Influence Of Fe Modelling Approachesmentioning

confidence: 99%

Influence of FE Modelling Approaches on Vulnerabilities of RC School Buildings and Proposal of a CFRP Retrofitting Intervention

Gazzani¹,

Poiani²,

Clementi³

et al. 2019

TOBCTJ

View full text Add to dashboard Cite

Background:The vulnerability assessment of existing school buildings against earthquakes represents a priority concern for society. In recent years, several countries promote seismic rehabilitation projects of school buildings, including the allocation of funds to regions with high seismic hazard. Objective:This research aims to highlight some key role aspects related to difficulties encountered in the numerical modelling of RC structures hosting school activities.This work evaluates the seismic vulnerability of school buildings located in the municipality of Trecastelli (Marche, Central Italy) to quantify the effective influence of typical and specific seismic vulnerabilities detected on the global seismic behaviour of each building.The effectiveness of a possible Carbon Fibre Reinforced Polymer (CFRP) local strengthening intervention, for the case study, aimed to confine unconfined beam-column joints is also considered. Methods:Three different numerical models of a Reinforced Concrete (RC) school building are implemented with the lumped plasticity, the distributed plasticity (fibre) and the 3D Continuum Finite Element (FE) approaches. Nonlinear static (pushover) analyses are performed to assess the global seismic behaviour of the structure, and the limitations to represent the reality with different approaches. After the seismic vulnerability assessment of the case study, a CFRP retrofitting intervention is proposed to confine external beam-column joints. Results:The comparison of the numerical results of three models shows that the fibre model is the least suitable means to represent shear problems, while the lumped plasticity model is closer to reality than the previous one even if it does not take into account the concomitance of bending, shear and axial force and the interaction between them in the inelastic response. Of course, the 3D Continuum model is the most accurate representation to describe the complex and combined mechanisms developed in the joint panels. Nonlinear static (pushover) analyses carried out on unreinforced and reinforced structures of Continuum model demonstrate that the Fibre Reinforced Polymer (FRP) strengthening improves the displacement capacity of the structure. Conclusion:This study has highlighted the strengths and weaknesses of different modelling types. The meaningful information about mechanisms developed in joints given by the 3D Continuum FE model is useful to identify shortcomings of the design project and to conceive a retrofitting strengthening intervention.CFRP sheets externally bonded on beam-column joints may improve the seismic frame performances without a significant change of the structural stiffness, promoting a ductile failure mode with a higher displacement capacity than the unreinforced case.

show abstract

A proposed model for nonlinear analysis of RC beam-column joints under seismic loading

Cited by 25 publications

References 17 publications

Revisiting the Versatility of Seismic Load-enabled Reinforced Concrete Beam Column Linkage

Revisiting the Versatility of Seismic Load-enabled Reinforced Concrete Beam Column Linkage

Influencing Parameters of Exterior Reinforced Concrete Beam-Column Joint Shear Strength: A Depth Review of Recent Advances

Influence of FE Modelling Approaches on Vulnerabilities of RC School Buildings and Proposal of a CFRP Retrofitting Intervention

Contact Info

Product

Resources

About