Reliability updating of partial factors for empirical codes: Application to Super-T PSC girders designs at the ultimate limit state in bending

Melhem, Mayer M.; Caprani, Colin C.; Stewart, Mark G.

doi:10.1016/j.istruc.2021.11.008

Cited by 4 publications

(2 citation statements)

References 24 publications

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“…As a result, it can be concluded that the actual bending capacity and shear bearing capacity of the test beams have a sufficient safety margin. Due to the fact that reliability indices are commonly generated from a series of structural designs with prospective partial safety factors and are used for comparison with the prescribed target reliability index [55,56], the above results can potentially provide a reference for the calibration and updating of a prescribed target reliability index for similar RC bridges in limit state design.…”

Section: Flexural and Shear Capacity Of Retired Beams Calculated By C...mentioning

confidence: 99%

Full-Scale Experimental Study of Shear and Flexural Behavior of 16-m Retired Reinforced Concrete T-Beams

Jiang

Feng

et al. 2023

Buildings

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Most of the existing engineering structures were built in the last century and have been in service for decades. However, environmental degradation may lead to a reduction in structural performance and service life. The mechanical property data of full-scale structures, such as bridges, are essential for structural health monitoring. For this purpose, five (half) reinforced concrete (RC) T-beams were removed from a retired 31-year-old bridge and subjected to destructive testing. Two loading points were employed, and the flexural and shear capacities of the retired T-beams were studied. The results showed that all the retired beams held high load capacities (exceeding 1400 kN). The two flexural test beams exhibited a high ductility, and the three shear test beams all failed. In addition, the existing cracks in the flexural test beams reopened when the load exceeded 200 kN, while it was 300 kN for the shear test beams. The load-carrying capacity experimental values of the test beams were compared with the ones calculated according to Chinese code JTG-3362-2018; it was shown that the retired T-beams still maintained a high degree of safety margins despite initial defects. The experimental results are expected to provide a reference for the assessment of in-service RC bridges.

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Section: Flexural and Shear Capacity Of Retired Beams Calculated By C...mentioning

confidence: 99%

Full-Scale Experimental Study of Shear and Flexural Behavior of 16-m Retired Reinforced Concrete T-Beams

Jiang

Feng

et al. 2023

Buildings

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“…Both limit states are based on the general concept of action and barrier, where P f can be calculated according to Equation (2). Structural reliability is verified by computational models using material and geometric characteristics with the application of various limits, such as stress limits [47,48], buckling limits [49,50], deformation limits [51,52], etc.…”

Section: Probability Analysis Of Reliability With Model Uncertaintiesmentioning

confidence: 99%

Quantification of Model Uncertainty Based on Variance and Entropy of Bernoulli Distribution

Kala

2022

Mathematics

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This article studies the role of model uncertainties in sensitivity and probability analysis of reliability. The measure of reliability is failure probability. The failure probability is analysed using the Bernoulli distribution with binary outcomes of success (0) and failure (1). Deeper connections between Shannon entropy and variance are explored. Model uncertainties increase the heterogeneity in the data 0 and 1. The article proposes a new methodology for quantifying model uncertainties based on the equality of variance and entropy. This methodology is briefly called “variance = entropy”. It is useful for stochastic computational models without additional information. The “variance = entropy” rule estimates the “safe” failure probability with the added effect of model uncertainties without adding random variables to the computational model. Case studies are presented with seven variants of model uncertainties that can increase the variance to the entropy value. Although model uncertainties are justified in the assessment of reliability, they can distort the results of the global sensitivity analysis of the basic input variables. The solution to this problem is a global sensitivity analysis of failure probability without added model uncertainties. This paper shows that Shannon entropy is a good sensitivity measure that is useful for quantifying model uncertainties.

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Design strength parameters of dot-by-dot Wire-and-Arc Additively Manufactured stainless steel bars

Laghi,

Arrè,

Gasparini

et al. 2025

Structures

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Reliability updating of partial factors for empirical codes: Application to Super-T PSC girders designs at the ultimate limit state in bending

Cited by 4 publications

References 24 publications

Full-Scale Experimental Study of Shear and Flexural Behavior of 16-m Retired Reinforced Concrete T-Beams

Full-Scale Experimental Study of Shear and Flexural Behavior of 16-m Retired Reinforced Concrete T-Beams

Quantification of Model Uncertainty Based on Variance and Entropy of Bernoulli Distribution

Design strength parameters of dot-by-dot Wire-and-Arc Additively Manufactured stainless steel bars

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