Flexural ductility of HSC members

Maghsoudi, Ali Akbar; Bengar, Habib Akbarzadeh

doi:10.12989/sem.2006.24.2.195

Cited by 28 publications

(14 citation statements)

References 2 publications

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“…In order to verify the accuracy of the proposed analytical model, available experimental data on the flexural behavior of non-strengthened/FRP-strengthened RHSC beams are collected from the existing literature [4,[33][34][35][36][37]. The key parameters of these tested beams are summarized in Table 2.…”

Section: Experimental Datamentioning

confidence: 99%

“…Hashemi et al (2009) studied the flexural behavior of RHSC beams strengthened with FRP sheets under four-point bending test [33]. Maghsoudi and Akbarzadeh (2006), and also Rashid and Mansur (2005) have tested RHSC beams under four-point bending test [34][35]. Rabinovitch and Frostig (2003) experimentally investigated flexural response of RHSC beams strengthened and rehabilitated with externally-bonded CFRP strips using four-point bending test [36].…”

Section: Experimental Datamentioning

confidence: 99%

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Analytical Assessment of Bending Ductility in FRP Strengthened RHSC Beams

Komleh

Maghsoudi

2018

Civ Eng J

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Over the past few years, a wide use of externally-bonded fiber-reinforced polymer composites (EB-FRP), for rehabilitation, strengthening and repair of existing/deteriorated reinforced/prestressed-concrete (RC/PC) structures has been observed. This paper presents a nonlinear iterative analytical approach conducted to investigate the effects of concrete strength, steel-reinforcement ratio and externally-reinforcement (FRP) stiffness on the flexural behavior and the curvature ductility index of the FRP-strengthened reinforced high-strength concrete (RHSC) beams. Analysis results using the proposed technique have shown very good agreement with the experimental data of FRP-strengthened/non-strengthened RHSC beams, regarding moment–curvature response, ultimate moment and failure mode. Also, a newly prediction equation for the curvature ductility index of FRP strengthened RHSC beams has been developed and verified. Then, converting equation of the curvature ductility index to energy one is proposed. Results indicate that the proposed predictions for the curvature and energy ductility indices are accurate to within 1.87% and 3.03% error for practical applications, respectively. Finally, limit values for these bending ductility indices, based on different design codes’ criterion, are assessed and discussed.

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Section: Experimental Datamentioning

confidence: 99%

Section: Experimental Datamentioning

confidence: 99%

Analytical Assessment of Bending Ductility in FRP Strengthened RHSC Beams

Komleh

Maghsoudi

2018

Civ Eng J

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“…When applied to RC members, the term ductility implies the ability to sustain significant inelastic deformation prior to collapse. As the evolving technology of using bonded CFRP for strengthening RC beams has attracted much attention in recent years and because HSC behaves like a brittle material, understanding the effects of such materials on the ductility of RC beams is critical (Maghsoudi and Akbarzadeh, 2006;Hashemi et al, 2008).…”

Section: Ductilitymentioning

confidence: 99%

Herpetofauna of the vicinity of Akşehir and Eber (Konya, Afyon), Turkey

Cihan¹,

Tok²

2014

Turk J Zool

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In continuous concrete beams, ductility allows redistribution of moment between the negative and positive moment zones. Although many in situ reinforced high strength concrete (RHSC) beams are of continuous construction, there has been very little research on such beams with external reinforcement. Due to premature debonding failures and the linear stress-strain characteristics of fiber reinforced polymer (FRP) up to failure, the ductility of plated members and their ability to redistribute moment is less than that of unplated RC beams.The present study examined the responses of RHSC continuous beams, in terms of enhancement of moment and load capacity, moment redistribution, and different types of ductility. Thickness of carbon FRP (CFRP) sheets, strengthening of both the hogging and sagging region, and end anchorage technique were the main parameters investigated.Various monitoring devices were used to monitor the loading history of the beams. Increasing the number of CFRP sheet layers increased ultimate strength, and decreased ductility, moment redistribution, and ultimate strain on CFRP sheets. Additionally, using end anchorage increased ultimate strength and moment redistribution. The moment enhancement ratio of the strengthened beams was significantly higher than the ultimate load enhancement ratio in the same beam. The proposed equation for converting the energy ductility index to the displacement ductility index provided accurate results.

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“…For unstrengthened RC members, displacement ductility index, in the range of 3 to 5 is considered imperative for adequate ductility, especially in the areas of seismic design and the redistribution of moments (Maghsoudi and Akbarzadeh 2006). Therefore, assuming that an index value of 3 represents an acceptable lower bound to ensuring the ductile behavior of RC continuous beams strengthened with FRP sheet, it appears that, for the tested beams SC3, SG3 would not meet that requirement ( .…”

Section: Ductilitymentioning

confidence: 99%

Flexural Strengthening of RC Continuous Beams Using Hybrid FRP Sheets

Akbarzadeh

Maghsoudi

2011

Advances in FRP Composites in Civil Engineering

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Due to linear stress-strain characteristics of FRP up to failure, the ductility of plated members and their ability to redistribute moment is less than that of unplated RC beams. Hybrid FRP laminates, which consist of a combination of either carbon and glass fibers, changes the behavior of the material to a non-linear behavior. Although many in situ RC beams are of continuous construction, there has been very little research into the behavior of such beams with external reinforcement. This paper presents an experimental program conducted to study the behaviour of RC two-span beams strengthened with hybrid carbon and glass reinforced polymer sheets (HCG). The program consists of a total of six continuous beams with overall dimensions equal to 250×150×6000 mm. The test results showed that using the HCG for strengthening the continuous RC beams lead to significantly increase of bearing capacity, ductility and moment redistribution ratio compared to strengthened beams with CFRP or GFRP.

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Flexural ductility of HSC members

Cited by 28 publications

References 2 publications

Analytical Assessment of Bending Ductility in FRP Strengthened RHSC Beams

Analytical Assessment of Bending Ductility in FRP Strengthened RHSC Beams

Herpetofauna of the vicinity of Akşehir and Eber (Konya, Afyon), Turkey

Flexural Strengthening of RC Continuous Beams Using Hybrid FRP Sheets

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