Nonlinear Stochastic Analysis of an Over-Reinforced Beam

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25510%2F17%3A39910529" target="_blank" >RIV/00216275:25510/17:39910529 - 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

Nonlinear Stochastic Analysis of an Over-Reinforced Beam

Popis výsledku v původním jazyce

The response of a reinforced concrete beam, which was designed with over-reinforcement to achieve concrete crushing, was investigated by experimental and numerical method. Due to inherent uncertainty in material constitutive models, a nonlinear finite element method (FEM) was combined with a suitable stochastic sampling technique to propose a more advanced model for estimating the response of an over-reinforced beam. For this purpose, the specimen was first tested under monotonic loading up to failure by four-point bending test. Then, the stochastic numerical model was developed by using Latin Hypercube Sampling (LHS) including statistical correlation among the prominent material parameters. Random parameters of the concrete and reinforcement steel were defined in accordance with the material test results or code recommendations. The constituent outcomes of the stochastic model including stress development and load‒displacement curves were presented in a form of statistical characteristics. Moreover, the reliability of the member was compared with the code requirement to ensure the safe loading range. To conclude, the result of the stochastic approach matched well with exhibited brittle behavior of the specimen, which was a sort of the concrete crushing due to reaching the limit strain of the concrete in compression.

Název v anglickém jazyce

Nonlinear Stochastic Analysis of an Over-Reinforced Beam

Popis výsledku anglicky

The response of a reinforced concrete beam, which was designed with over-reinforcement to achieve concrete crushing, was investigated by experimental and numerical method. Due to inherent uncertainty in material constitutive models, a nonlinear finite element method (FEM) was combined with a suitable stochastic sampling technique to propose a more advanced model for estimating the response of an over-reinforced beam. For this purpose, the specimen was first tested under monotonic loading up to failure by four-point bending test. Then, the stochastic numerical model was developed by using Latin Hypercube Sampling (LHS) including statistical correlation among the prominent material parameters. Random parameters of the concrete and reinforcement steel were defined in accordance with the material test results or code recommendations. The constituent outcomes of the stochastic model including stress development and load‒displacement curves were presented in a form of statistical characteristics. Moreover, the reliability of the member was compared with the code requirement to ensure the safe loading range. To conclude, the result of the stochastic approach matched well with exhibited brittle behavior of the specimen, which was a sort of the concrete crushing due to reaching the limit strain of the concrete in compression.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

20102 - Construction engineering, Municipal and structural engineering

Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

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