Nonlinear global design resistance: Case studies of post-tensioned concrete bridges made of I-73 and KA-61 girders

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F24%3APU152593" target="_blank" >RIV/00216305:26110/24:PU152593 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1002/suco.202300986" target="_blank" >https://doi.org/10.1002/suco.202300986</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/suco.202300986" target="_blank" >10.1002/suco.202300986</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Nonlinear global design resistance: Case studies of post-tensioned concrete bridges made of I-73 and KA-61 girders

Popis výsledku v původním jazyce

The paper portrays a comprehensive computational procedure for determining the global structural resistances of two existing bridges made of I-73 and KA-61 precast post-tensioned concrete girders using advanced statistical assessment methods in combination with nonlinear fracture mechanics-based finite element method analysis. Although this combination is a powerful tool for realistic modeling of structures, its practical application is still very time consuming. Therefore, a statistical sampling approach for the determination of the structural design resistance is compared to selected efficient semi-probabilistic methods based on the estimation of coefficient of variation-estimation of coefficient of variation (ECoV) method according to fib Model Code 2010 and improved approach called Eigen ECoV method. Load-bearing capacity is determined for the ultimate as well as several serviceability limit states. The sensitivity of the input parameters burdened with uncertainties on the response of the structure is quantified using a sensitivity analysis supported by a surrogate model based on polynomial chaos expansion. The paper shows that the applicability of nonlinear modeling with respect to uncertainties is possible when using these ECoV methods and a surrogate model and can be applied in a routine manner. The shortcomings and advantages of all the used safety design/assessment methods are discussed.

Název v anglickém jazyce

Nonlinear global design resistance: Case studies of post-tensioned concrete bridges made of I-73 and KA-61 girders

Popis výsledku anglicky

The paper portrays a comprehensive computational procedure for determining the global structural resistances of two existing bridges made of I-73 and KA-61 precast post-tensioned concrete girders using advanced statistical assessment methods in combination with nonlinear fracture mechanics-based finite element method analysis. Although this combination is a powerful tool for realistic modeling of structures, its practical application is still very time consuming. Therefore, a statistical sampling approach for the determination of the structural design resistance is compared to selected efficient semi-probabilistic methods based on the estimation of coefficient of variation-estimation of coefficient of variation (ECoV) method according to fib Model Code 2010 and improved approach called Eigen ECoV method. Load-bearing capacity is determined for the ultimate as well as several serviceability limit states. The sensitivity of the input parameters burdened with uncertainties on the response of the structure is quantified using a sensitivity analysis supported by a surrogate model based on polynomial chaos expansion. The paper shows that the applicability of nonlinear modeling with respect to uncertainties is possible when using these ECoV methods and a surrogate model and can be applied in a routine manner. The shortcomings and advantages of all the used safety design/assessment methods are discussed.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20100 - Civil engineering

Projekt

<a href="/cs/project/GA22-00774S" target="_blank" >GA22-00774S: Pravděpodobnostní posouzení v mostním inženýrství za užití náhradního metamodelu (MAPAB)</a><br>

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Structural Concrete

ISSN

1464-4177

e-ISSN

1751-7648

Svazek periodika

25

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

16

Strana od-do

4167-4182

Kód UT WoS článku

001300569500001

EID výsledku v databázi Scopus

2-s2.0-85202520550