Reliability assessment of FRP-confined concrete columns designed for buildings

Zou, Ying; Hong, Han

doi:10.1080/15732470802416998

Cited by 21 publications

(9 citation statements)

References 25 publications

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“…1 These percentile values are related to sample size for quality control purposes according to ASTM Standard D7290 [3]. Although Eckold [10] and Zureick et al [31] have reported that the COV of the FRP tensile modulus is in the range of 0.01-0.12, a later study [29] has suggested that this uncertainty has an insignificant effect on the reliability of FRP-strengthened RC members. Accordingly, the tensile modulus of FRP is assumed to be deterministic in the subsequent reliability analysis.…”

Section: Mechanical Properties Of Fiber-reinforced Polymer Compositesmentioning

confidence: 99%

Limit state design criteria for FRP strengthening of RC bridge components

Wang

Ellingwood

2015

Structural Safety

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Section: Mechanical Properties Of Fiber-reinforced Polymer Compositesmentioning

confidence: 99%

Limit state design criteria for FRP strengthening of RC bridge components

Wang

Ellingwood

2015

Structural Safety

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“…Experimental investigation on shear strength enhancement of RC beams externally reinforced with FRP composites (carbon/epoxy wet layup, E-glass/epoxy wet layup and carbon/epoxy precured strips) was carried out by Mosallam and Banerjee (2007). Zou and Hong (2008) proposed a reliability-based methodology for verifying the adequacy of concrete resistance factor for FRPconfined RC columns that is proposed in Canadian code. Rocca et al (2009) presented a procedure to develop simplified axial load-bending moment interaction diagram for FRP-wrapped RC columns of circular and non-circular cross-sections using equilibrium and strain compatibility.…”

Section: Introductionmentioning

confidence: 99%

Seismic retrofitting of damaged exterior beam–column joints using fibre reinforced plastic composite–steel plate combined technique

Sasmal

Novák

Ramanjaneyulu

et al. 2010

Structure and Infrastructure Engineering

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A conventional gravity load design philosophy for reinforced concrete (RC) structures has been slowly replaced by seismic design since the 1970s. But, till recently, capacity design and ductile detailing were not strictly implemented in practice in many developing countries which are prone to seismic hazard. In the present study, performance of exterior beam-column joints designed based on ductile and non-ductile philosophy has been studied under cyclic load. It is found that although the incorporation of ductile detailing has considerably improved the seismic behaviour of the structural component, it could not assure the damage propagation in a safe zone. Moreover, in both specimens, the main damage has been concentrated in the joint zone irrespective of ductile detailing. Further, the damaged specimens were adequately repaired and suitably retrofitted using fibre reinforced plastic and steel plate and tested again under the same cyclic load. The retrofitted 'NonDuctile' specimen, as proposed in this study, could not only be able to regain its original performance (in terms of strength deterioration, stiffness degradation, energy dissipation), but has also shown improved performance in comparison to the original ones which is ideally desirable as well. Further, the retrofitted 'Ductile' specimen has shown a promising aspect of the proposed retrofitting strategy for seismically damaged components.

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“…Reliability analysis is an essential tool for ensuring robust design and evaluating safe condition of a structural element [19]. There are several probabilistic methods to evaluate the uncertainty using the reliability analysis theory, e.g., the analytical approaches using first-order/second-order reliability method (FORM/SORM) [20][21][22][23][24][25][26][27], Monte Carlo simulation (MCS) [28], weighted average simulation [29], and subset simulation [30]. Although the MCS method is commonly used to evaluate the reliability index owing to its accuracy and simplicity, this approach needs a large number of data points to obtain an accurate reliability index of a very small failure domain [31].…”

Section: Introductionmentioning

confidence: 99%

Reliability Analysis of FRP-Confined Concrete at Ultimate using Conjugate Search Direction Method

et al. 2020

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In this paper compressive strength and ultimate strain results in the current database of fiber-reinforced polymer (FRP)-confined concrete are used to determine the reliability of their design space. The Lognormal, Normal, Frechet, Gumbel, and Weibull distributions are selected to evaluate the probabilistic characteristics of six FRP material categories. Following this, safety levels of the database are determined based on a probabilistic model. An iterative reliability method is developed with conjugate search direction for evaluating the reliability. The results show that Lognormal and Gumbel distributions provide best probability distribution for model errors of strength and strain enhancement ratios. The developed conjugate reliability method provides improved robustness over the existing reliability methods owing to its faster convergence to stable results. The results reveal that the part of the database containing normal strength concrete (NSC) heavily confined (i.e., actual confinement ratio (flu,a/f’co) > 0.5) by low and normal modulus carbon fibers (i.e., fiber elastic modulus (Ef) ≤ 260 GPa) and moderately confined (i.e., 0.3 ≤ flu,a/f’co ≤ 0.5) by aramid fibers exhibits a very high safety level. The segments of the database with a low and moderate safety level have been identified as i) NSC moderately and heavily confined by higher modulus glass fibers (i.e., Ef > 60 GPa), ii) high strength concrete (HSC) moderately and heavily confined (i.e., flu,a/f’co > 0.3) by glass fibers, iii) HSC lightly confined (i.e., flu,a/f’co ≤ 0.2) by carbon fibers, and iv) HSC lightly confined by aramid fibers. Additional experimental studies are required on these segments of the database before they can be used reliably for design and modeling purposes.

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Reliability assessment of FRP-confined concrete columns designed for buildings

Cited by 21 publications

References 25 publications

Limit state design criteria for FRP strengthening of RC bridge components

Limit state design criteria for FRP strengthening of RC bridge components

Seismic retrofitting of damaged exterior beam–column joints using fibre reinforced plastic composite–steel plate combined technique

Reliability Analysis of FRP-Confined Concrete at Ultimate using Conjugate Search Direction Method

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