Model Uncertainties of Advanced Numerical Simulations of Slabs Subjected to Punching

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F15%3A00232117" target="_blank" >RIV/68407700:21110/15:00232117 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Model Uncertainties of Advanced Numerical Simulations of Slabs Subjected to Punching

Popis výsledku v původním jazyce

Advanced numerical simulations are more often used due to the increasing possibilities of computer technology. These models are based on generally valid principles of continuum mechanics, in which nonlinear constitutive relations are employed for material descriptions. Due to the global nature of nonlinear numerical analysis the design condition is based on a global safety format. It is expected that in the near future the reliability of structures will be assessed by use of these sophisticated calculations. For this purpose, it is firstly necessary to evaluate the model uncertainty of the numerical model. Model uncertainty directly affects reliability of the final design. The correctness of its determination is therefore crucial for the safe design of structures. Recommended values of model uncertainties differ in individual scientific literary sources. However recommended values of model uncertainties differ according to individual studies and/or individual programs. In this context it should be noted that model uncertainty has to be evaluated for each program/model separately. In each program it is implemented different formulation of constitutive equations (especially in case of quasi-brittle materials), although these physical laws directly affect the final accuracy of program. Also it is presented method which enables respecting relatively small amount of experiments when the partial safety factor is derived.The presented research deals with the description of uncertainties of numerical models for resistance of punching capacity of slabs. The model uncertainties were identified and subsequently recommendation of safety factor for model uncertainty is proposed.

Název v anglickém jazyce

Model Uncertainties of Advanced Numerical Simulations of Slabs Subjected to Punching

Popis výsledku anglicky

Advanced numerical simulations are more often used due to the increasing possibilities of computer technology. These models are based on generally valid principles of continuum mechanics, in which nonlinear constitutive relations are employed for material descriptions. Due to the global nature of nonlinear numerical analysis the design condition is based on a global safety format. It is expected that in the near future the reliability of structures will be assessed by use of these sophisticated calculations. For this purpose, it is firstly necessary to evaluate the model uncertainty of the numerical model. Model uncertainty directly affects reliability of the final design. The correctness of its determination is therefore crucial for the safe design of structures. Recommended values of model uncertainties differ in individual scientific literary sources. However recommended values of model uncertainties differ according to individual studies and/or individual programs. In this context it should be noted that model uncertainty has to be evaluated for each program/model separately. In each program it is implemented different formulation of constitutive equations (especially in case of quasi-brittle materials), although these physical laws directly affect the final accuracy of program. Also it is presented method which enables respecting relatively small amount of experiments when the partial safety factor is derived.The presented research deals with the description of uncertainties of numerical models for resistance of punching capacity of slabs. The model uncertainties were identified and subsequently recommendation of safety factor for model uncertainty is proposed.

Druh

D - Stať ve sborníku

CEP obor

JM - Inženýrské stavitelství

OECD FORD obor

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Projekt

<a href="/cs/project/TE01020168" target="_blank" >TE01020168: Centrum pro efektivní a udržitelnou dopravní infrastrukturu (CESTI)</a><br>

Návaznosti

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

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of the Fifteenth International Conference on Civil, Structural and Environmental Engineering Computing

ISBN

978-1-905088-63-8

ISSN

1759-3433

e-ISSN

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Počet stran výsledku

12

Strana od-do

1-12

Název nakladatele

Civil-Comp Press Ltd

Místo vydání

Stirling

Místo konání akce

Praha

Datum konání akce

1. 9. 2015

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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