Global sensitivity analysis of reliability of structural bridge system
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F19%3APU135548" target="_blank" >RIV/00216305:26110/19:PU135548 - isvavai.cz</a>
Result on the web
<a href="http://www.elsevier.com/locate/engstruct" target="_blank" >http://www.elsevier.com/locate/engstruct</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.engstruct.2019.05.045" target="_blank" >10.1016/j.engstruct.2019.05.045</a>
Alternative languages
Result language
angličtina
Original language name
Global sensitivity analysis of reliability of structural bridge system
Original language description
The article deals with the analysis of the probability of failure of a load-bearing steel bridge member under bending. The focus is on fatigue failure caused by stress cycles from multiple repeated traffic loading on the bridge. Failure is defined by the occurrence of a fatigue crack of critical size. Crack propagation and the fatigue limit state are described using linear fracture mechanics. The failure probability is a function of the equivalent stress range, initial crack length, Paris exponent, number of load cycles (stress changes) increasing over time and other input random variables. The failure probability is evaluated in time steps and then studied using a new type of global sensitivity analysis subordinated to contrasts. The results of the sensitivity analysis show that the first (second) dominant variable is the equivalent stress range (initial crack length) at any given point in time of the bridge operation. Strong main effect of equivalent stress range is associated with higher values of failure probability at the end of the lifetime of the bridge. Small values of failure probability are strongly influenced by interactions among input variables, which cannot be expressed as the sum of main effects of the individual input variables. The main and higher-order indices of each input variable are supplemented by displaying its total index. The direct goal of probability and sensitivity analysis is structural reliability. Sensitivity analysis confirms and deepens the knowledge gained from the time-dependent probability analysis. The numerical example illustrates the rationality of probability-oriented sensitivity indices and the feasibility of their estimation using Latin Hypercube Sampling (LHS). In addition, structural reliability is studied using Bayesian probability, which identifies the times for planning bridge inspections.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20101 - Civil engineering
Result continuities
Project
<a href="/en/project/GA17-01589S" target="_blank" >GA17-01589S: Advanced computational and probabilistic modelling of steel structures taking account fatigue damage</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
ENGINEERING STRUCTURES
ISSN
0141-0296
e-ISSN
1873-7323
Volume of the periodical
2019
Issue of the periodical within the volume
194
Country of publishing house
GB - UNITED KINGDOM
Number of pages
9
Pages from-to
36-45
UT code for WoS article
000472991300004
EID of the result in the Scopus database
2-s2.0-85065918867