Reliability-based calibration of design code formulas

Reliability-based calibration of design code formulas: Application to shear resistance formulas for reinforced concrete members without shear reinforcement

Slobbe, Arthur (TNO)
Rózsás, Árpád (TNO)
Yang, Y. (TU Delft Concrete Structures)

2022

This paper presents a reliability-based calibration method for design code formulas. The method is demonstrated on the shear design formulas in Eurocode 2 and fib Model Code 2010 (MC2010). We found that the partial factor (Formula presented.) in the current Eurocode 2 is about 20% lower than the optimal value and, thus, provides an insufficient safety margin. The obtained optimal partial factor (Formula presented.) in the (modified) Eurocode 2 and MC2010 formulas is 1.53 and 1.36, respectively. The difference stems from higher accuracy and, hence, lower uncertainty of the MC2010 model in predicting experimental results. Hence, on average, the MC2010 formula leads to about 13% larger design resistances compared to Eurocode 2 given that the target reliability for both design formulas is the same. To stimulate and facilitate future structural code development and derivation of partial factors, we make the used computer code freely available.

design
model uncertainty
partial factor
reinforced concrete
reliability-based calibration
shear formula

http://resolver.tudelft.nl/uuid:3377a8ec-35fa-4ccb-aafd-b057bf6341a4

https://doi.org/10.1002/suco.202200583

2023-07-01

1464-4177

Structural Concrete, 24 (2), 2979-3001

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Institutional Repository

journal article

© 2022 Arthur Slobbe, Árpád Rózsás, Y. Yang