CFRP-based structural repairing and strengthening of deficient cast-in-place RC foundation-column joints

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25510%2F25%3A39923017" target="_blank" >RIV/00216275:25510/25:39923017 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.engstruct.2025.121236" target="_blank" >https://doi.org/10.1016/j.engstruct.2025.121236</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.engstruct.2025.121236" target="_blank" >10.1016/j.engstruct.2025.121236</a>

Jazyk výsledku

angličtina

Název v původním jazyce

CFRP-based structural repairing and strengthening of deficient cast-in-place RC foundation-column joints

Popis výsledku v původním jazyce

The foundation-column joint (FCJ) is a critical structural component in moment-resisting reinforced concrete (RC) frames. Field observations from recent seismic events have shown that exterior or corner cast-in-place RC FCJs without transverse reinforcement were prone to damage, impairing the seismic performance of the entire structural system. Such joints, commonly found in Turkey and other seismically active regions with inadequate construction and inspection practices, experienced concrete cover crushing, followed by buckling of the longitudinal reinforcement. This study investigated the cyclic response of a deficient and carbon fiber-reinforced polymer (CFRP)-strengthened exterior RC FCJ, along with the repair of a pre-damaged FCJ using CFRP, through a combined experimental and numerical approach. A code-compliant FCJ with proper transverse reinforcement was also tested as a reference, which primarily exhibited a flexural hinge at the column base. The deficient FCJ exhibited failure due to concrete crushing and longitudinal bar buckling within the foundation panel-consistent with post-earthquake field evidence. CFRP repair of the pre-damaged FCJ effectively mitigated further panel deterioration. Additionally, the CFRP strengthening scheme applied prior to damage significantly improved both the strength and displacement capacities of the deficient FCJ, outperforming even the codecompliant specimen. The results confirmed that CFRP application to joint panel was highly effective in enhancing the cyclic performance of exterior FCJs lacking transverse reinforcement.

Název v anglickém jazyce

CFRP-based structural repairing and strengthening of deficient cast-in-place RC foundation-column joints

Popis výsledku anglicky

The foundation-column joint (FCJ) is a critical structural component in moment-resisting reinforced concrete (RC) frames. Field observations from recent seismic events have shown that exterior or corner cast-in-place RC FCJs without transverse reinforcement were prone to damage, impairing the seismic performance of the entire structural system. Such joints, commonly found in Turkey and other seismically active regions with inadequate construction and inspection practices, experienced concrete cover crushing, followed by buckling of the longitudinal reinforcement. This study investigated the cyclic response of a deficient and carbon fiber-reinforced polymer (CFRP)-strengthened exterior RC FCJ, along with the repair of a pre-damaged FCJ using CFRP, through a combined experimental and numerical approach. A code-compliant FCJ with proper transverse reinforcement was also tested as a reference, which primarily exhibited a flexural hinge at the column base. The deficient FCJ exhibited failure due to concrete crushing and longitudinal bar buckling within the foundation panel-consistent with post-earthquake field evidence. CFRP repair of the pre-damaged FCJ effectively mitigated further panel deterioration. Additionally, the CFRP strengthening scheme applied prior to damage significantly improved both the strength and displacement capacities of the deficient FCJ, outperforming even the codecompliant specimen. The results confirmed that CFRP application to joint panel was highly effective in enhancing the cyclic performance of exterior FCJs lacking transverse reinforcement.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20102 - Construction engineering, Municipal and structural engineering

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

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

343

Číslo periodika v rámci svazku

15 November 2025

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

17

Strana od-do

121236

Kód UT WoS článku

001565261300005

EID výsledku v databázi Scopus

2-s2.0-105014731333