A robust 3D finite element model for concrete columns confined by FRCM system

Kadhim, Majid M.A.; Altaee, Mohammed; Adheem, Ali Hadi; Jawdhari, Akram

doi:10.1051/matecconf/201928101006

Cited by 6 publications

(4 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It should be mentioned here that in all cases and when the control value of dilation angle (45 o and 50 o when 16mm and 22 mm diameter bar were used in the tension zone) was used in the simulation there is a slight variation of data over time histories achieved from test and simulated results. These slight differences can be attributed to the support fixity where the perfect fixity of FE model does not exist in the experiment [27], [28].…”

Section: Dilation Anglementioning

confidence: 87%

Employment of damage plasticity constitutive model for concrete members subjected to high strain-rate

Altaee¹,

Kadhim²,

Altayee³

et al. 2020

Proceedings of the Proceedings of the 1st International Multi-Disciplinary Conference Theme: Sustainable Development and Smart

View full text Add to dashboard Cite

Concrete damage plasticity (CDP) model is used to model the concrete damage through using ABAQUS software. Among several input parameters that should be defined in CDP model, the dilation angle (ψ), eccentricity parameter and tensile behaviour, have been identified as a significant influence on the finite element (FE) results for concrete modelling under static loading while limited studies examined these parameters for concrete subjected to impact load and high-strain rate. This study aims to focus on numerical modelling of impact-loaded concrete, examine and calibrate the above CDP model parameters using three-dimensional FE modelling. Several values of dilation angles, ψ, of 30 to 55 0 and eccentricity parameter of 0.1 to 0.2 have been used to capture the test behaviour. The model tensile softening behaviour was also investigated using three models, bilinear stress-strain, tri-linear stress-strain and stress-crack opening displacement. The FE results revealed that the value of dilation angle ranged 45-50 0 , the eccentricity parameter and tri-linear stress-strain model of tensile softening provided better correlations with test results in terms of displacement-time plots and cracking paths.

show abstract

Section: Dilation Anglementioning

confidence: 87%

Employment of damage plasticity constitutive model for concrete members subjected to high strain-rate

Altaee¹,

Kadhim²,

Altayee³

et al. 2020

Proceedings of the Proceedings of the 1st International Multi-Disciplinary Conference Theme: Sustainable Development and Smart

View full text Add to dashboard Cite

show abstract

“…In response to these drawbacks, inorganic binders, such as from cement or geopolymer mortars, have been implemented to provide a sustainable and environmentally-friendly adhesive. The new system is known in literature as textile reinforced mortar (TRM) or fiber reinforced cementitious mortar (FRCM), and it consists of orthogonal FRP fabric meshes or grids, embedded in the mortar [5][6][7][8][9][10]. FRCM technique has been successfully used in strengthening RC beams in flexure, shear and torsional loading cases [7,11,12].…”

Section: Introductionmentioning

confidence: 99%

“…FRCM technique has been successfully used in strengthening RC beams in flexure, shear and torsional loading cases [7,11,12]. It was also investigated for the case of strengthening RC columns [6,8,9] and plain stub columns [5,10]. Application of FRCM technique for stub columns demonstrated potential enhancement to concrete strength as a result of confinement.…”

Section: Introductionmentioning

confidence: 99%

Application of Drucker-Prager Plasticity Model for Concrete Confined with Fiber Reinforced Cementitious Mortar (FRCM)

Adheem¹,

Kadhim²,

Jawdhari³

et al. 2022

Proceedings of 2nd International Multi-Disciplinary Conference Theme: Integrated Sciences and Technologies, IMDC-IST 2021, 7-9

View full text Add to dashboard Cite

Wrapping concrete columns with fiber reinforced polymer (FRP) jackets can result in a significant increase of compressive strength and ductility, and can mitigate deterioration due to aging, chemical attacks, overloading, and seismic activity. Cementitious mortar has recently been used as a binder for FRP reinforcement, leading to a sustainable and environmental friendly construction, in lieu of synthetic binders (e.g. epoxy) which suffer from a number of drawbacks. The system is termed fiber reinforced cementitious mortar (FRCM) and can be used to repair concrete in shear and flexure, or in columns confinement. In this study, a comprehensive three-dimensional (3D) finite element (FE) model was developed to study the behavior of concrete confined with FRCM jackets. The model incorporated a Drucker-Prager (DP) plasticity law to simulate effects of confinement on concrete core, a composite damage mechanics (CDM) criteria to predict rupture of FRP mesh, and a concrete plasticity model to simulate cracking of the cementitious mortar. The model predictions were compared with test results of 11 FRCMconfined concrete cylinders comprising various dimensions, FRCM layers, and concrete strengths. The model was able to accurately predict the peak compressive strength of confined concrete (f cc), peak axial strain (ε cc), and entire stress-strain curve in addition to the failure mode of each analyzed specimen. Calibrated model will enable examination of several geometric and material parameters, and assist in establishing an accurate confinement model for FRCM-confined concrete.

show abstract

“…Axially loaded concrete elements may need strengthening to increase their load capacity to respond to change in function, comply with stricter design codes, address construction or design errors, and repair damage due to insufficient maintenance [1]. While column strengthening has been conventionally achieved by using steel or concrete jackets, fiber-reinforced polymer (FRP) wraps have become widely used due to favorable characteristics including high strength to weight ratio, resistance to corrosion, ease and speed of installation, and minimal change of geometry [2].…”

Section: Introductionmentioning

confidence: 99%

Predictive Capability of Existing Confinement Models for FRCM Composites Confined Concrete

Kadhim¹,

Adheem²,

Jawdhari³

et al. 2020

Proceedings of the Proceedings of the 1st International Multi-Disciplinary Conference Theme: Sustainable Development and Smart

View full text Add to dashboard Cite

Concrete confinement by the means of external fiber reinforced polymer (FRP) jacketing has been proved to be an effective method to increase the compressive strength and ductility, as well as mitigating deterioration due to aging, chemical attacks, overloading, and seismic activity. Concerns about the organic matrices used in FRP resulted in the development of fiber-reinforced cementitious mortar (FRCM) as a costeffective and sustainable alternative system, used to repair reinforced concrete beams in shear and flexure, or in column confinement. Several theoretical models have been proposed for FRCM confined concrete elements, based on limited laboratory tests. In this study, the predictive capability of four design models has been tested by comparing their predictions for confined concrete compressive strength (fcc) and ultimate axial strain (εcc) with a large experimental database of 137 samples found in the literature. The model developed by Ombres and Mazzuca [6] provided the highest calibrations with test data, although it still needs further improvements to include the effects of key geometric and material variables. Further efforts should be made to improve the performance of the design models and provide an accurate theoretical confinement model for FRCM-wrapped columns, for design and evaluation purposes.

show abstract

A robust 3D finite element model for concrete columns confined by FRCM system

Cited by 6 publications

References 15 publications

Employment of damage plasticity constitutive model for concrete members subjected to high strain-rate

Employment of damage plasticity constitutive model for concrete members subjected to high strain-rate

Application of Drucker-Prager Plasticity Model for Concrete Confined with Fiber Reinforced Cementitious Mortar (FRCM)

Predictive Capability of Existing Confinement Models for FRCM Composites Confined Concrete

Contact Info

Product

Resources

About