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Structural Reliability Assessment Including Variability of Reinforcement Cover Based on Measurements on Selected Buildings Cover

Structural Reliability Assessment Including Variability of Reinforcement Cover Based on Measurements on Selected Buildings

Open Access
|Dec 2023

Figures & Tables

Figure 1.

The building on which the measurements were carried out
The building on which the measurements were carried out

Figure 2.

Reinforcement visible after concrete stripping (a, b) and HILTI PS200 Ferroscan (c)
Reinforcement visible after concrete stripping (a, b) and HILTI PS200 Ferroscan (c)

Figure 3.

Histogram of the frequency of results depending on the deviation value a) for all results, b) for results with a design reinforcement cover value of 25 mm
Histogram of the frequency of results depending on the deviation value a) for all results, b) for results with a design reinforcement cover value of 25 mm

Figure 4.

a) Histogram taking into account the measured values, b) Log-normal distribution fitted on the basis of the measured values
a) Histogram taking into account the measured values, b) Log-normal distribution fitted on the basis of the measured values

Figure 5.

a) Distribution of the slab resistance, b) distribution of the effect of actions
a) Distribution of the slab resistance, b) distribution of the effect of actions

Figure 6.

Comparison of calculated reliability index values with standard values
Comparison of calculated reliability index values with standard values

Reinforcement selected for the considered slabs

Lp.Span [m]Section height [mm]MEd [kNm]As [cm2]
1.3.2807.553.87 (ϕ 8/13cm)
2.4.812017.005.03 (ϕ 8/10cm)
3.7.218038.246.54 (ϕ 10/12cm)
4.8.020047.217.14 (ϕ 10/11cm)

Parameters of random variables

Lp.VariableMean valueStandard deviationDistribution
1.fc33 MPa4.86 MPalognormal
2.fy535.2 MPa42.8 MPalognormal
3.g1.27 N/mm0.08 N/mmnormal
4.p1.87 N/mm0.56 N/mmnormal
5.c36.51 mm16.1 mmlognorma

Determined failure probability and reliability index values for assumed slab thicknesses_

Lp.Slab thickness [mm]βPf
1.801.010.16
2.1202.2910.9·10−3
3.1803.432.97·10−4
4.2003.749.34·10−5
DOI: https://doi.org/10.2478/acee-2023-0054 | Journal eISSN: 2720-6947 | Journal ISSN: 1899-0142
Language: English
Page range: 103 - 108
Submitted on: Apr 28, 2023
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Accepted on: Jun 1, 2023
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Published on: Dec 31, 2023
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year

© 2023 Katarzyna Sieńkowska-Szpetnar, published by Silesian University of Technology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.