Model uncertainties of concrete cracking resistance models based on probabilistic simulations

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F26%3A0200227" target="_blank" >RIV/00216305:26110/26:0200227 - isvavai.cz</a>

Result on the web

<a href="https://framcos.org/FraMCoS-12/Full-Papers/1378.pdf" target="_blank" >https://framcos.org/FraMCoS-12/Full-Papers/1378.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.21012/fc12.1378" target="_blank" >10.21012/fc12.1378</a>

Result language

angličtina

Original language name

Model uncertainties of concrete cracking resistance models based on probabilistic simulations

Original language description

In the paper, the probabilistic assessment of cracking resistance of concrete flexural members is presented. The aim of the performed analysis was to verify an alternative formula for cracking resistance calculation and to compare the proposed method with two standard methods. The experimental investigation performed at Lublin University of technology was used to verify the design models. The accuracy and reliability of the calculation methods was assessed by analyzing the model uncertainty θ. When model uncertainty θ > 1.0 the prediction model yields a lower value of cracking resistance and is thus conservative, while a value of θ < 1.0 implies that the prediction model yields higher cracking resistance than is actually available in the structure and is thus un conservative. A high model uncertainty θ = 1.53 was found when the cracking resistance was calculated by standard method assuming a linear distribution of normal stresses over the cross section and taking the maximum tensile stress as the concrete axial tensile strength. When applying the flexural tensile concrete strength defined in Eurocode 2 instead of axial tensile strength in a cracking resistance formula, the model uncertainty decreased to θ = 1.15 but the model was still conservative. The best prediction of cracking resistance was obtained for the proposed method in which the influence of a size effect and fracture properties of concrete on cracking moment were included. In this case the model uncertainty was close to 1.0 (θ = 0.94) with a relatively small scatter.

Czech name

—

Czech description

—

Type

O - Miscellaneous

CEP classification

—

OECD FORD branch

20102 - Construction engineering, Municipal and structural engineering

Project

<a href="/en/project/GF25-14337L" target="_blank" >GF25-14337L: Multi-fidelity modelling of shear concrete strength based on experiments, simulation and probabilistic approaches (MMOSS)</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů