Stochastic modelling and assessment of long-span precast prestressed concrete elements failing in shear

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F21%3APU140965" target="_blank" >RIV/00216305:26110/21:PU140965 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0141029620341018" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0141029620341018</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.engstruct.2020.111500" target="_blank" >10.1016/j.engstruct.2020.111500</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Stochastic modelling and assessment of long-span precast prestressed concrete elements failing in shear

Popis výsledku v původním jazyce

The shear behaviour of reinforced and prestressed concrete structures has been extensively studied over the last decades. However, there are still numerous open questions, concerning, e.g. the effects of normal-shear force interaction and material properties on shear performance. While the elastic behaviour of structures can be accurately captured by existing analytical approximations available within code standards, the description of the plastic behaviour of prestressed concrete elements occurring before typically quasi-brittle shear failure requires nonlinear analysis. Therefore, most prestressed concrete structures are designed to utilise only the elastic capacity of the material to avoid the performance of a complex nonlinear finite element analysis (hereinafter NLFEA) of pre-failure behaviour. In the case of mass-produced precast elements, however, the higher cost of performing NLFEA to provide valuable information on the complete loading of such element's history might be justified and economically beneficial. NLFEA can give much more objective information on a structure's performance and ultimate capacity, its cracking behaviour and failure indicators which can be utilised for the optimisation of the design, maintenance and inspection of produced structural elements. However, deterministic NLFEA cannot capture the naturally uncertain character of structural response. Current code standards provide a framework for NLFEA using several safety formats. The fully probabilistic approach remains the most general, straightforward and least conservative way of considering uncertainties, however. The stochastic modelling of a precast element's shear response requires the performance of a series of fracture-mechanical experiments with material samples, the evaluation of stochastic features of material parameters, and the use of identified random parameters as inputs for highly accurate nonlinear finite element models of destructive experiments. The information on mater

Název v anglickém jazyce

Stochastic modelling and assessment of long-span precast prestressed concrete elements failing in shear

Popis výsledku anglicky

The shear behaviour of reinforced and prestressed concrete structures has been extensively studied over the last decades. However, there are still numerous open questions, concerning, e.g. the effects of normal-shear force interaction and material properties on shear performance. While the elastic behaviour of structures can be accurately captured by existing analytical approximations available within code standards, the description of the plastic behaviour of prestressed concrete elements occurring before typically quasi-brittle shear failure requires nonlinear analysis. Therefore, most prestressed concrete structures are designed to utilise only the elastic capacity of the material to avoid the performance of a complex nonlinear finite element analysis (hereinafter NLFEA) of pre-failure behaviour. In the case of mass-produced precast elements, however, the higher cost of performing NLFEA to provide valuable information on the complete loading of such element's history might be justified and economically beneficial. NLFEA can give much more objective information on a structure's performance and ultimate capacity, its cracking behaviour and failure indicators which can be utilised for the optimisation of the design, maintenance and inspection of produced structural elements. However, deterministic NLFEA cannot capture the naturally uncertain character of structural response. Current code standards provide a framework for NLFEA using several safety formats. The fully probabilistic approach remains the most general, straightforward and least conservative way of considering uncertainties, however. The stochastic modelling of a precast element's shear response requires the performance of a series of fracture-mechanical experiments with material samples, the evaluation of stochastic features of material parameters, and the use of identified random parameters as inputs for highly accurate nonlinear finite element models of destructive experiments. The information on mater

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20102 - Construction engineering, Municipal and structural engineering

Projekt

<a href="/cs/project/GA17-02862S" target="_blank" >GA17-02862S: Pravděpodobnostní modelování a optimalizace smykové únosnosti betonových nosníků (PROMOSS)</a><br>

Návaznosti

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

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

ENGINEERING STRUCTURES

ISSN

0141-0296

e-ISSN

1873-7323

Svazek periodika

228

Číslo periodika v rámci svazku

111500

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

16

Strana od-do

1-16

Kód UT WoS článku

000606747600004

EID výsledku v databázi Scopus

—