Resistance Models for Semi-Probabilistic Assessment of Historic Steel Bridges

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F20%3A00344552" target="_blank" >RIV/68407700:21110/20:00344552 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21610/20:00344552

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Resistance Models for Semi-Probabilistic Assessment of Historic Steel Bridges

Popis výsledku v původním jazyce

The mechanical properties of historic metal materials exhibit a considerable scatter dependent on periods of construction and the region of a producer. Assessments of historic metal bridges then need to be based on measurements and tests. The use of non- or minor-destructive tests (NDTs) is often preferred over destructive tests (DTs) to reduce the cost of a structural survey. This contribution explores the measurement errors associated with common NDT hardness techniques and quantifies uncertainties in design (assessment) values of resistance. When deriving the partial factor, the uncertainty in geometry and model uncertainty is considered along with the variability of a material property and measurement error. Numerical studies reveal the effects of measurement error and model uncertainty (bending, buckling) on assessment values of resistance. A unity mean and coefficient of variation of 12% might be adopted for the measurement uncertainty of the hardness methods under study as a first approximation. On average, the true assessment resistance is by ~15% larger than that based on an NDT survey. Model uncertainty affects the partial factor for the resistance of historic metal bridges.

Název v anglickém jazyce

Resistance Models for Semi-Probabilistic Assessment of Historic Steel Bridges

Popis výsledku anglicky

The mechanical properties of historic metal materials exhibit a considerable scatter dependent on periods of construction and the region of a producer. Assessments of historic metal bridges then need to be based on measurements and tests. The use of non- or minor-destructive tests (NDTs) is often preferred over destructive tests (DTs) to reduce the cost of a structural survey. This contribution explores the measurement errors associated with common NDT hardness techniques and quantifies uncertainties in design (assessment) values of resistance. When deriving the partial factor, the uncertainty in geometry and model uncertainty is considered along with the variability of a material property and measurement error. Numerical studies reveal the effects of measurement error and model uncertainty (bending, buckling) on assessment values of resistance. A unity mean and coefficient of variation of 12% might be adopted for the measurement uncertainty of the hardness methods under study as a first approximation. On average, the true assessment resistance is by ~15% larger than that based on an NDT survey. Model uncertainty affects the partial factor for the resistance of historic metal bridges.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20102 - Construction engineering, Municipal and structural engineering

Projekt

<a href="/cs/project/DG18P02OVV033" target="_blank" >DG18P02OVV033: Metody pro zajištění udržitelnosti ocelových mostních konstrukcí industriálního kulturního dědictví</a><br>

Návaznosti

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

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of the IABSE Symposium – Synergy of Culture and Civil Engineering – History and Challenges

ISBN

978-3-85748-169-7

ISSN

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e-ISSN

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Počet stran výsledku

8

Strana od-do

1061-1068

Název nakladatele

IABSE

Místo vydání

Zürich

Místo konání akce

Wrocław

Datum konání akce

7. 10. 2020

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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