Numerical simulation of the time-dependent and rate-dependent behavior in CFRP-concrete interfaces

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F25%3A00386834" target="_blank" >RIV/68407700:21110/25:00386834 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1201/9781003677895-121" target="_blank" >https://doi.org/10.1201/9781003677895-121</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1201/9781003677895-121" target="_blank" >10.1201/9781003677895-121</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Numerical simulation of the time-dependent and rate-dependent behavior in CFRP-concrete interfaces

Popis výsledku v původním jazyce

The use of externally bonded carbon fiber reinforced polymer (EB-CFRP) for retrofitting reinforced concrete (RC) structures has proven to be highly effective in civil engineering applications. However, the performance of EB-CFRP systems is influenced by factors such as loading rate and time-dependent effects, which are not adequately addressed in existing standards and guidelines. This study employs numerical simulations to investigate the interfacial behavior of CFRP-concrete systems, focusing on rate-dependent and time-dependent effects. A three-dimensional (3D) lattice discrete particle model (LDPM) is used to represent concrete at the mesoscale, while a creep model based on the micro-prestress solidification (MPS) theory is incorporated to capture time-dependent deformations. A parametric analysis is conducted to examine the influence of loading rate on the load responses, showing that higher loading rates lead to increased load for post-peak behavior. Additionally, the long-term behavior of the interface under sustained loading is analyzed. The results show that sustained loading causes continuous displacement increase due to creep, reducing the debonding failure threshold. The strain distribution in the FRP plate is slightly different due to the creep behavior of concrete. The findings provide valuable insights into the rate and time-dependent behavior of CFRP-concrete interfaces, contributing to the improved design and long-term performance assessment of EB-CFRP strengthening systems.

Název v anglickém jazyce

Numerical simulation of the time-dependent and rate-dependent behavior in CFRP-concrete interfaces

Popis výsledku anglicky

The use of externally bonded carbon fiber reinforced polymer (EB-CFRP) for retrofitting reinforced concrete (RC) structures has proven to be highly effective in civil engineering applications. However, the performance of EB-CFRP systems is influenced by factors such as loading rate and time-dependent effects, which are not adequately addressed in existing standards and guidelines. This study employs numerical simulations to investigate the interfacial behavior of CFRP-concrete systems, focusing on rate-dependent and time-dependent effects. A three-dimensional (3D) lattice discrete particle model (LDPM) is used to represent concrete at the mesoscale, while a creep model based on the micro-prestress solidification (MPS) theory is incorporated to capture time-dependent deformations. A parametric analysis is conducted to examine the influence of loading rate on the load responses, showing that higher loading rates lead to increased load for post-peak behavior. Additionally, the long-term behavior of the interface under sustained loading is analyzed. The results show that sustained loading causes continuous displacement increase due to creep, reducing the debonding failure threshold. The strain distribution in the FRP plate is slightly different due to the creep behavior of concrete. The findings provide valuable insights into the rate and time-dependent behavior of CFRP-concrete interfaces, contributing to the improved design and long-term performance assessment of EB-CFRP strengthening systems.

Druh

C - Kapitola v odborné knize

CEP obor

—

OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/GA23-04971S" target="_blank" >GA23-04971S: Predikce mechanického chování struktur tvořených 3D tiskem slitiny titanu s betastrukturou</a><br>

Návaznosti

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

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název knihy nebo sborníku

Engineering Materials, Structures, Systems and Methods for a More Sustainable Future

ISBN

9781003488644

Počet stran výsledku

6

Strana od-do

728-733

Počet stran knihy

616

Název nakladatele

CRC Press

Místo vydání

London

Kód UT WoS kapitoly

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