Using Model Updating to Predict the Failure of Reinforced Concrete Elements

Rafiq, Yaqub; Al-Farttoosi, Mahdi

doi:10.1061/9780784413029.058

Cited by 2 publications

(3 citation statements)

References 13 publications

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“…Closer inspection revealed that the composition of these values follow the initiation of the crack pattern in the beam samples. Details of this process was discussed in Rafiq and Farttoosi (2013). An interesting finding of the model updating process for the beam with CFRP is that the CFRP delays the failure process of the samples.…”

Section: Resultsmentioning

confidence: 99%

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Predicting the Behaviour of Reinforced Concrete Elements Strengthened with CFRP Using Model Updating Techniques

Rafiq

Al-Farttoosi

2014

Computing in Civil and Building Engineering (2014)

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War, terrorist attacks, explosions, progressive collapse and other unforeseen circumstances have damaged many buildings and bridges. Evidence from studying damaged structures has shown that Reinforced Concrete (RC) slabs, beams, columns, where damaged but not failed, can be strengthened using Carbon Fibre Reinforced Polymer (CFRP) to restore their load carrying capacities and make them serviceable. Currently there is no reliable analytical model that closely represents the true behaviour of the CFRP strengthened elements. This study extends the research on the implementation of model updating techniques on RC beams, to RC beams strengthened with CFRP. Our research shows that it is possible to find analytical models that closely match the experimental results. These analytical models can be used to more accurately predict the behaviour of the damaged structural elements strengthened with CFRP.

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Section: Resultsmentioning

confidence: 99%

“…The authors (Rafiq and Al-Farttoosi 2013) demonstrated that using model updating techniques is an effective way of finding suitable analytical models for RC beams that closely predicts their response to applied loading. This paper extends these findings to RC beams strengthened with CFRP.…”

Section: Introductionmentioning

confidence: 99%

Predicting the Behaviour of Reinforced Concrete Elements Strengthened with CFRP Using Model Updating Techniques

Rafiq

Al-Farttoosi

2014

Computing in Civil and Building Engineering (2014)

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“…Many techniques have been investigated to determine how to strengthen and rehabilitate beams using FRP composites. Both the EBR and NSM techniques are viewed as good strengthening systems due to their ability to enhance the shear and flexural capacity of RC structures [7][8][9][10][11][12][13][14][15][16][17][18][19][20]. The major concern surrounding adhesively bonding plates to the external surface of reinforced concrete beams is the premature debonding of the plates, which is a unique form of failure observed in plated beams [21].…”

Section: Introductionmentioning

confidence: 99%

Flexural Strength of Damaged RC Beams Repaired with Carbon Fiber-Reinforced Polymer (CFRP) Using Different Techniques

Turki,

Al-Farttoosi

2023

Fibers

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In this study, an experimental program was developed to investigate the flexural behavior of pre-damaged reinforced concrete (RC) beams that had been repaired and strengthened using carbon fiber-reinforced polymer (CFRP) laminates under a monotonic load. Two techniques were used: externally bonded reinforcement (EBR) and near-surface-mounted (NSM) reinforcement, to repair and strengthen the tested beams. The experimental program involved casting and testing nine simply supported RC rectangular beams; one beam was considered as the reference beam and did not undergo additional strengthening, and the remaining beams were strengthened using CFRP laminates. These eight beams were divided into two main groups for the purposes of strengthening: beams for which the EBR technique was used, and beams for which the NSM technique was used. The primary variables observed in the EBR and NSM groups included four damage percentages obtained according to the preload (20, 40, 60, and 80%) from the ultimate load carried by the reference beam. The experimental results show that decreasing the damage percentage leads to an increase in ultimate strength from about 3.6% to 17.2% for the beams repaired using the EBR technique and from 27.6% to 57% for the beams repaired using the NSM technique; additionally, the NSM method was more effective than the EBR method in terms of the flexural strength and mode of failure. However, using CFRP laminates enhances the flexure capacity of strengthened RC beams.

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Using Model Updating to Predict the Failure of Reinforced Concrete Elements

Cited by 2 publications

References 13 publications

Predicting the Behaviour of Reinforced Concrete Elements Strengthened with CFRP Using Model Updating Techniques

Predicting the Behaviour of Reinforced Concrete Elements Strengthened with CFRP Using Model Updating Techniques

Flexural Strength of Damaged RC Beams Repaired with Carbon Fiber-Reinforced Polymer (CFRP) Using Different Techniques

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