Flexural behavior of hollow HPC beams with cross-wound CFRP shear reinforcement

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21720%2F25%3A00377386" target="_blank" >RIV/68407700:21720/25:00377386 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.engstruct.2024.119055" target="_blank" >https://doi.org/10.1016/j.engstruct.2024.119055</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.engstruct.2024.119055" target="_blank" >10.1016/j.engstruct.2024.119055</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Flexural behavior of hollow HPC beams with cross-wound CFRP shear reinforcement

Popis výsledku v původním jazyce

This article presents cross-wound carbon fiber-reinforced polymer (CFRP) shear reinforcement of hollow high-performance concrete (HPC) beams. A removable mold used to form the core of the hollow elements was utilized for reinforcement positioning. Basalt fiber-reinforced polymer (BFRP) tensile reinforcement was attached to the removable mold by spacers, and the CFRP shear reinforcement was cross-wound around the BFRP bars from carbon rovings oriented at ± 45° from the longitudinal axis. The flexural, and shear performance of the hollow HPC structural beams was evaluated. To set a comparison, specimens without any shear reinforcement and specimens made of HPC with 80 kg/m3 of dispersed short steel fibers were tested alongside them. The shear capacity of the specimens with CFRP reinforcement evaluated in a three-point bending test was up to 73 % higher compared to those with dispersed steel fibers. The cross-wound CFRP reinforcement also complemented the BFRP tensile reinforcement, as for specimens that failed in tension, the ones with CFRP reinforcement achieved 25 % higher ultimate flexural strength compared to those with dispersed steel fibers. The inclined CFRP mesh affected the orientation of the critical shear crack resulting in higher shear capacity at a longer shear span. Direct effect of the longitudinal reinforcement ratio on the shear capacity was observed.

Název v anglickém jazyce

Flexural behavior of hollow HPC beams with cross-wound CFRP shear reinforcement

Popis výsledku anglicky

This article presents cross-wound carbon fiber-reinforced polymer (CFRP) shear reinforcement of hollow high-performance concrete (HPC) beams. A removable mold used to form the core of the hollow elements was utilized for reinforcement positioning. Basalt fiber-reinforced polymer (BFRP) tensile reinforcement was attached to the removable mold by spacers, and the CFRP shear reinforcement was cross-wound around the BFRP bars from carbon rovings oriented at ± 45° from the longitudinal axis. The flexural, and shear performance of the hollow HPC structural beams was evaluated. To set a comparison, specimens without any shear reinforcement and specimens made of HPC with 80 kg/m3 of dispersed short steel fibers were tested alongside them. The shear capacity of the specimens with CFRP reinforcement evaluated in a three-point bending test was up to 73 % higher compared to those with dispersed steel fibers. The cross-wound CFRP reinforcement also complemented the BFRP tensile reinforcement, as for specimens that failed in tension, the ones with CFRP reinforcement achieved 25 % higher ultimate flexural strength compared to those with dispersed steel fibers. The inclined CFRP mesh affected the orientation of the critical shear crack resulting in higher shear capacity at a longer shear span. Direct effect of the longitudinal reinforcement ratio on the shear capacity was observed.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

Projekt

<a href="/cs/project/GA24-12052S" target="_blank" >GA24-12052S: Composite action of textile reinforced concrete skin and recycled aggregate concrete core</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 periodika

Engineering Structures

ISSN

0141-0296

e-ISSN

1873-7323

Svazek periodika

322

Číslo periodika v rámci svazku

Part A

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

—

Kód UT WoS článku

001330257800001

EID výsledku v databázi Scopus

2-s2.0-85205253916