Flexural response of external R.C. beam–column joints externally strengthened with steel cages

Campione, Giuseppe; Cavaleri, Liborio; Papia, Maurizio

doi:10.1016/j.engstruct.2015.09.009

Cited by 28 publications

(8 citation statements)

References 26 publications

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“…Beam-column joint specimens with conventional beam strengthened with steel cages were tested in [11]. The authors showed the increase regarding strength and ductility and developed a simplified model to include such type of interventions in pushover analyses of RC framed structures.…”

Section: Introductionmentioning

confidence: 99%

FE Modelling of the Seismic Behavior of Wide Beam-Column Joints Strengthened with CFRP Systems

Santarsiero¹

2018

Buildings

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A large share of reinforced concrete (RC) framed buildings is provided with wide beams being a type of beam allowing greater freedom in the architectural arrangement of interiors, beyond further advantage due to fewer formworks needed during the construction. Nevertheless, little attention has been devoted to the seismic vulnerability of this kind of framed RC buildings as well as to the study of strengthening systems purposely developed for wide beams and wide beam-column connections. Under these premises, this paper proposes simple strengthening solutions made by Fibre Reinforced Polymers (FRP) systems able to effectively improve seismic capacity through feasible arrangement suitable in case a wide beam is present. On the basis of wide beam-column joints previously tested without strengthening system, detailed nonlinear finite element models were calibrated. Then, an FRP strengthening intervention based on a brand new arrangement was modeled in order to perform additional simulations under seismic actions. This way, the effectiveness of the strengthening intervention was assessed finding out that significant strength and ductility increments were achieved with a relatively simple and cheap strengthening arrangement. Additional research would be desirable in the form of experimental tests on the simulated wide beam-column joints.

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Section: Introductionmentioning

confidence: 99%

FE Modelling of the Seismic Behavior of Wide Beam-Column Joints Strengthened with CFRP Systems

Santarsiero¹

2018

Buildings

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“…Considerable amount of experimental and analytical studies have been carried out to investigate the seismic performance of RC beam-column joints subjected to lateral earthquake loading (Elsouri and Harajli (2013), Lee et al (2009), Masi et al (2013) and Sasmal et al (2013)) or development of retrofitting techniques for vulnerable existing RC beam column joints (Eslami and Ronagh (2014), Esmaeeli et al (2014), Vecchio et al (2016), Shwan and Abdul Razak (2016), Esmaeeli et al (2015) and Campione et al (2015)). Some of these researches were concentrated on shear resistance and behavior of RC beam-column joints.…”

Section: Introductionmentioning

confidence: 99%

Finite Element Analysis of Reinforced Concrete Beam-Column Connections with Governing Joint Shear Failure Mode

Najafgholipour

Dehghan

Dooshabi

et al. 2017

Lat. Am. j. solids struct.

112

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Reinforced concrete (RC) beam-column connections especially those without transverse reinforcement in joint region can exhibit brittle behavior when intensive damage is concentrated in the joint region during an earthquake event. Brittle behavior in the joint region can compromise the ductile design philosophy and the expected overall performance of structure when subjected to seismic loading. Considering the importance of joint shear failure influences on strength, ductility and stability of RC moment resisting frames, a finite element modeling which focuses on joint shear behavior is presented in this article. Nonlinear finite element analysis (FEA) of RC beam-column connections is performed in order to investigate the joint shear failure mode in terms of joint shear capacity, deformations and cracking pattern. A 3D finite element model capable of appropriately modeling the concrete stress-strain behavior, tensile cracking and compressive damage of concrete and indirect modeling of steel-concrete bond is used. In order to define nonlinear behavior of concrete material, the concrete damage plasticity is applied to the numerical model as a distributed plasticity over the whole geometry. Finite element model is then verified against experimental results of two non-ductile beam-column connections (one exterior and one interior) which are vulnerable to joint shear failure. The comparison between experimental and numerical results indicates that the FE model is able to simulate the performance of the beam-column connections and is able to capture the joint shear failure in RC beam-column connections.

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“…Grouting of members for reducing the cracks and voids was done by injecting the slurry under pressure which resulted in the reduction of splitting of concrete in the members once the load is applied [4] [5]. Steel jacketing is done using the adhesively bonded steel plates and steel strips with the result depending on the varying strip spacing and thickness of the bonded plates [6] [7] [8]. The effect of FRPs strengthening on BCJ shows the effect of orientation, grooving/bonding, anchoring, embedded nature, thickness and layers among various other factors on the strength imparted by it in strengthening the members.…”

Section: Strengthening Techniquesmentioning

confidence: 99%

Numerical Modelling of an Exterior RC Beam Column Joint Subjected to Cyclic Loading Strengthened Using UHPFRC and CFRP

Fayaz¹,

Kaur²,

Bansal³

2022

ASPS Conf. Proc.

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A poorly detailed reinforced concrete (RC) beam-column joint (BCJ) is highly susceptible to damage under seismic forces due to the generation of shear stresses. Shear stresses are generated due to the continuous change in the direction of the compression and tension forces acting on the beam-column joint. As a result, the strength, stiffness and the energy dissipation of the whole structure is affected. It needs to be addressed beforehand by improving its shear, tensile and energy dissipation capacities so that the damage is minimised. So a structure needs to be strengthened prior to any major damage. In the present study the seismic performance assessment of a BCJ strengthened by a combination of ultra-high performance fibre reinforced concrete (UHPFRC) and carbon fibre reinforced polymer (CFRP) has been done analytically in ABAQUS. The seismic parameters observed are the hysteresis response, strength, stiffness, ductility and energy dissipation of the specimens strengthened both by UHPFRC and CFRP. From the results it is clear that the combination of the two strengthening schemes is very efficient in increasing the peak load 2.62 times and the ductility by almost 6% of the specimens as compared to the specimens strengthened using only one scheme. Also the energy dissipation shows an increase of 7.3% in case of using the combination strengthening strategy. The rate of degradation of the strength is also reduced substantially.

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Flexural response of external R.C. beam–column joints externally strengthened with steel cages

Cited by 28 publications

References 26 publications

FE Modelling of the Seismic Behavior of Wide Beam-Column Joints Strengthened with CFRP Systems

FE Modelling of the Seismic Behavior of Wide Beam-Column Joints Strengthened with CFRP Systems

Finite Element Analysis of Reinforced Concrete Beam-Column Connections with Governing Joint Shear Failure Mode

Numerical Modelling of an Exterior RC Beam Column Joint Subjected to Cyclic Loading Strengthened Using UHPFRC and CFRP

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