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

Katarzyna Sieńkowska-Szpetnar
Katarzyna Sieńkowska-Szpetnar
   | 31 gru 2023
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Data publikacji: 31 gru 2023
Zakres stron: 103 - 108
Otrzymano: 28 kwi 2023
Przyjęty: 01 cze 2023
DOI: https://doi.org/10.2478/acee-2023-0054
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© 2023 Katarzyna Sieńkowska-Szpetnar, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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. 3.2 80 7.55 3.87 (ϕ 8/13cm)
2. 4.8 120 17.00 5.03 (ϕ 8/10cm)
3. 7.2 180 38.24 6.54 (ϕ 10/12cm)
4. 8.0 200 47.21 7.14 (ϕ 10/11cm)

Parameters of random variables

Lp. Variable Mean value Standard deviation Distribution
1. fc 33 MPa 4.86 MPa lognormal
2. fy 535.2 MPa 42.8 MPa lognormal
3. g 1.27 N/mm 0.08 N/mm normal
4. p 1.87 N/mm 0.56 N/mm normal
5. c 36.51 mm 16.1 mm lognorma

Determined failure probability and reliability index values for assumed slab thicknesses.

Lp. Slab thickness [mm] β Pf
1. 80 1.01 0.16
2. 120 2.29 10.9·10−3
3. 180 3.43 2.97·10−4
4. 200 3.74 9.34·10−5
eISSN:
2720-6947
Język:
Angielski
Częstotliwość wydawania:
4 razy w roku
Dziedziny czasopisma:
Architecture and Design, Architecture, Architects, Buildings
Kanał RSS czasopisma