Investigation on the effects of fiber composites at concrete joints

Parvin, Azadeh; Granata, P

doi:10.1016/s1359-8368(99)00046-3

Cited by 59 publications

(28 citation statements)

References 5 publications

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“…Although a majority of numerical studies have been carried out on RC beam-column connections (Parvin and Granata (2000), Mostofinejad and Talaeitaba (2006), Niroomandi et al (2010), Ronagh (2011), Masi et al (2013) and Haach et al (2008)) by FEM softwares such as ANSYS, ABAQUS and DIANA, these studies have concentrated on simulating flexural behavior of beams and columns adjacent to the joint region and are not focused on joint shear behavior of RC connections, while in many cases the shear strength and behavior of joints control the overall response of RC beam-column connections subjected to seismic actions. It should be noted that capturing shear dominant failure mode in discontinuity region of connection is a very complicated numerical simulation problem.…”

Section: Latin American Journal Of Solids and Structures 14 (2017) 12mentioning

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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Section: Latin American Journal Of Solids and Structures 14 (2017) 12mentioning

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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“…Comparison of FE results with the experimentally observed response indicated that the proposed nonlinear FE model can accurately predict the behavior and response of tested RC beam-column joints. Parvin and Granata (2000) investigated the application of FRP laminates to exterior beam-column joints in order to increase their moment capacity using numerical analysis performed by ANSYS. In their study again SOLID65, LINK8 and SOLID46 elements were used to simulate the concrete, rebar and the FRP laminates, respectively.…”

Section: Ansys Analytical Proceduresmentioning

confidence: 99%

“…As was explained in the previous sections, SOLID46 with anisotropic material properties has been used to model FRP laminates (Parvin and Granata 2000;Kachlakev et al 2001;Mahini 2005). Tension-only membrane SELL41 and elastic SHELL99 have also been used for this purpose Hawileh et al 2012).…”

Section: Fiber Reinforced Polymer (Frp)mentioning

confidence: 99%

“…In this area, different issues such as joint shear strengthening; increasing member stiffness and plastic hinge relocation have been investigated. Along with experimental studies, many researches have utilised finite element models to predict the behaviour of FRP strengthened beam-column subassemblies (Parvin and Granata 2000;Wong and Vecchio 2003;Mahini and Ronagh 2009;Alhaddad et al 2012;Shrestha et al 2013). Variety of finite element programs are currently available for the purpose of numerical study of FRP strengthened reinforced concrete structures.…”

Section: Introductionmentioning

confidence: 99%

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On the FE Modeling of FRP-Retrofitted Beam–Column Subassemblies

Ronagh

Baji

2014

Int J Concr Struct Mater

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The use of fiber reinforced polymer (FRP) composites in strengthening reinforced concrete beam-column subassemblies has been scrutinised both experimentally and numerically in recent years. While a multitude of numerical models are available, and many match the experimental results reasonably well, there are not many studies that have looked at the efficiency of different finite elements in a comparative way in order to clearly identify the best practice when it comes to modelling FRP for strengthening. The present study aims at investigating this within the context of FRP retrofitted reinforced concrete beam-column subassemblies. Two programs are used side by side; ANSYS and VecTor2. Results of the finite element modeling using these two programs are compared with a recent experimental study. Different failure and yield criteria along with different element types are implemented and a useful technique, which can reduce the number of elements considerably, is successfully employed for modeling planar structures subjected to in-plane loading in ANSYS. Comparison of the results shows that there is good agreement between ANSYS and VecTor2 results in monotonic loading. However, unlike VecTor2 program, implicit version of ANSYS program is not able to properly model the cyclic behavior of the modeled subassemblies. The paper will be useful to those who wish to study FRP strengthening applications numerically as it provides an insight into the choice of the elements and the methods of modeling to achieve desired accuracy and numerical stability, a matter not so clearly explored in the past in any of the published literature.

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“…Later, this idea was developed by laboratory and analytic works of other researchers, such as Lee et al, who used FRP jacket for shear and flexural strengthening of joints [2], Antonopoulos and Thanasis, who studied the use of fiber reinforced polymer (CFRP) composites for strengthening of beam-column joints with focus on fiber debonding [3], and Parvin and Granata [4,5], who studied the effect of FRP on RC joints through computer modeling as well as laboratory work. These studies have been generally focused on augmenting the shear strength.…”

Section: Introductionmentioning

confidence: 99%

Soft Computing-based Approach on Capacity Prediction of FRP Strengthened RC Joints

2018

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Abstract. Shear failure of the RC beam-column joints is a brittle failure which has no prior warning and can induce tremendous damages because of collapse of column and joint before the connected beam. This paper is focused on one particular method of strengthening the RC joints, that is, the use of FRP composites as confining element. The results of previous studies have shown that strengthening the RC beam-column joints with FRP composites can improve their shear capacity. In this study, the data collected from the existing standards and studies regarding the FRP strengthened RC joints were used to develop an artificial neural network model for predicting the shear strength contribution of FRP jacket. The developed model was then used to evaluate the role of different parameters on this contribution, and finally derive a formula for contribution of FRP jacket to the shear strength of the RC beam-column joints.

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Investigation on the effects of fiber composites at concrete joints

Cited by 59 publications

References 5 publications

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

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

On the FE Modeling of FRP-Retrofitted Beam–Column Subassemblies

Soft Computing-based Approach on Capacity Prediction of FRP Strengthened RC Joints

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