Assessment of the crushing strength of concrete rings reinforced with synthetic fibers

• Autorzy: Głuszko Agnieszka , Buda-Ożóg Lidia

Identyfikatory

DOI

10.24425/ace.2025.155097

Warianty tytułu

PL

Wytrzymałość na zgniatanie prefabrykowanych kręgów wykonanych z betonu zbrojnego włóknami syntetycznymi

• Języki publikacji: EN

Abstrakty

EN

Since the 1990s, the technology of fiber-reinforced concrete has undergone significant development, initiated by the publication of the comprehensive ACI 544 committee report. Standardized methods for measuring the key mechanical properties of fiber-reinforced concrete are outlined in EN 14651 and ASTM C1609, while material properties are specified in CEN/TS 19101. It is widely known that the addition of fibers improves the properties of concrete; however, their effectiveness depends on various factors such as material type (metallic and non-metallic fibers), shape (crimped and fibrillated fibers), dimensions (length, diameter and slenderness), fiber volume in the concrete mix, and even the consistency of the mix. The aim of the experimental studies was to assess the load-bearing capacity of concrete produced under industrial conditions, modified with various synthetic fibers at different dosages. The primary selection criterion for the fibers was to meet the residual strength requirements of the tested element with the lowest possible weight fraction of dispersed reinforcement. In addition to determining the residual strength of PFRC, the study also measured compressive strength, flexural tensile strength, and the modulus of elasticity. The obtained results and force-crack width relationships were used to validate the numerical model of a standard notched beam. This calibrated material model was then used to develop a finite element model (FEM) and to conduct a preliminary assessment of the load-bearing capacity of prefabricated FRC rings using the ATENA software.

PL

Od lat 90. XX wieku technologia betonu zbrojonego włóknami przeszła znaczący rozwój, który został zapoczątkowany przez publikację kompleksowego raportu komitetu ACI 544. Znormalizowano sposoby pomiarów kluczowych właściwości mechanicznych fibrobetonu w EN 14651 i ASTM C1609 oraz materiałowych w CEN/TS 19101. Powszechnie wiadomo, że dodatek włókien poprawia właściwości betonu, jednak skuteczność ich zależy od wielu czynników takich jak: rodzaj materiału (włókna metaliczne i niemetaliczne), kształt (włókna faliste i fibrylowane), wymiary (długość, średnica i smukłość), objętość w mieszance betonowej, a nawet konsystencji mieszanki. Celem przeprowadzonych badań doświadczalnych była ocena nośności betonu produkowanego w warunkach przemysłowych, modyfikowanego różnymi włóknami syntetycznymi o zróżnicowanym dawkowaniu. Docelowym kryterium wyboru włókien było spełnienie wymagań wytrzymałości resztkowej badanego elementu przy możliwie najmniejszym udziale wagowym zbrojenia rozproszonego. W trakcie prowadzonych badań oprócz wytrzymałości resztkowej PFRC, wyznaczono wytrzymałość na ściskanie, rozciąganie przy zginaniu oraz moduł sprężystości. Otrzymane wyniki oraz zależności siła-rozwarcie szczeliny, wykorzystano do walidacji modelu numerycznego normowej belki z nacięciem. Tak skalibrowany model materiałowy wykorzystano do budowy docelowego modelu MES i wstępnej oceny nośności fibrobetonowych kręgów prefabrykowanych w programie ATENA. Projekt „Regionalne Centrum Doskonałości w Inżynierii dla Jakości Życia i Rozwoju Technologii”, finansowany z subwencji Ministra Nauki i Szkolnictwa Wyższego w ramach programu „Regionalna Inicjatywa Doskonałości” (projekt nr RID/SP/0032/2024/01)

• Wydawca: Komitet Inżynierii Lądowej i Wodnej PAN ; Politechnika Warszawska, Wydział Inżynierii Lądowej
• Czasopismo: Archives of Civil Engineering
• Rocznik: 2025
• Tom: Vol. 71, nr 3
• Strony: 247--264
• Opis fizyczny: Bibliogr. 44 poz., il., tab.

Twórcy

autor

Głuszko Agnieszka

• Rzeszow University of Technology, Faculty of Civil Engineering, Rzeszow, Poland

• https://orcid.org/0000-0002-9978-1323

autor

Buda-Ożóg Lidia

• Rzeszow University of Technology, Faculty of Civil Engineering, Rzeszow, Poland

• https://orcid.org/0000-0002-1205-1345

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