Optimising Surveys and Reliability Assessments of Historic Cast-Iron Columns

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21610%2F18%3A00326108" target="_blank" >RIV/68407700:21610/18:00326108 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.witpress.com/elibrary/wit-transactions-on-the-built-environment/175/36908" target="_blank" >https://www.witpress.com/elibrary/wit-transactions-on-the-built-environment/175/36908</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.2495/HPSM180081" target="_blank" >10.2495/HPSM180081</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Optimising Surveys and Reliability Assessments of Historic Cast-Iron Columns

Popis výsledku v původním jazyce

ast iron structures mostly date back to the second half of the 19th century. Material properties vary due to different composition and production techniques that have been used in different regions over decades. This is why it is of crucial importance to obtain case-specific information on properties of historic structures. Many historic metal structures do not fulfil requirements of present standards. Decisions about adequate construction interventions should be based on complex assessment of structural reliability. In this contribution, the material properties of an iron column are investigated and the key considerations for reliability assessment are presented. Three fundamental issues are addressed to optimise surveys and reliability assessments of cast iron columns: 1) an optimum number of material tests; 2) the selection between a finite element (FE) and analytical model; and 3) the target reliability level for a historic structure. It is shown that uncertainties due to limited test data, variability of material and geometrical properties, and resistance model uncertainty can be treated by a semi-probabilistic verification method. As a first approximation, five tensile tests might be considered as an optimum survey strategy. The application of FE models is more demanding than that of simplified analytical formulas, but it can better reflect structure-specific conditions and may increase structural resistance by about 15%. Optimum target reliability level for existing structures with a cultural heritage value could be lower than that for structural design and the assessment value of resistance may increase by about 20% for a reduced target level.

Název v anglickém jazyce

Optimising Surveys and Reliability Assessments of Historic Cast-Iron Columns

Popis výsledku anglicky

ast iron structures mostly date back to the second half of the 19th century. Material properties vary due to different composition and production techniques that have been used in different regions over decades. This is why it is of crucial importance to obtain case-specific information on properties of historic structures. Many historic metal structures do not fulfil requirements of present standards. Decisions about adequate construction interventions should be based on complex assessment of structural reliability. In this contribution, the material properties of an iron column are investigated and the key considerations for reliability assessment are presented. Three fundamental issues are addressed to optimise surveys and reliability assessments of cast iron columns: 1) an optimum number of material tests; 2) the selection between a finite element (FE) and analytical model; and 3) the target reliability level for a historic structure. It is shown that uncertainties due to limited test data, variability of material and geometrical properties, and resistance model uncertainty can be treated by a semi-probabilistic verification method. As a first approximation, five tensile tests might be considered as an optimum survey strategy. The application of FE models is more demanding than that of simplified analytical formulas, but it can better reflect structure-specific conditions and may increase structural resistance by about 15%. Optimum target reliability level for existing structures with a cultural heritage value could be lower than that for structural design and the assessment value of resistance may increase by about 20% for a reduced target level.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/DG16P02M050" target="_blank" >DG16P02M050: Optimalizace sledování a hodnocení informací o památkových stavbách</a><br>

Návaznosti

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

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of HPSM/OPTI 2018 - the 2018 International Conference on High Performance and Optimum Design of Structures and Materials

ISBN

978-1-78466-289-9

ISSN

1743-3509

e-ISSN

—

Počet stran výsledku

12

Strana od-do

71-82

Název nakladatele

WIT Press, Ashurst Lodge

Místo vydání

Southampton

Místo konání akce

Ljubljana

Datum konání akce

11. 7. 2018

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—