Experimental behaviour of concrete-filled steel tube composite beams

• Autorzy: Farhan Khawla A. , Shallal Muhaned A.

Identyfikatory

DOI

10.24425/ace.2020.131807

• Języki publikacji: EN

Abstrakty

EN

The main objective of this study is to highlight the performance of beams composed of lightweight concrete-filled steel tubes (square and circle sections) composite with reinforced concrete deck slab. A total of nine composite beams were tested included two circular and seven square concrete-filled steel tubes. Among the nine composite beams, one beam, S20-0-2000, was prepared without a deck slab to act as a reference specimen. The chief parameters investigated were the length of the specimen, the compressive strength of the concrete slab, and the effect of the steel tube section type. All beams were tested using the three-point bending test with a concentrated central point load and simple supports. The test results showed that the first crack in the concrete deck slab was recorded at load levels ranging from 50.9% to 77.2% of the ultimate load for composite beams with square steel tubes. The ultimate load increased with increasing the compressive strength of the concrete slab. Shorter specimens were more stiffness than the other specimens but were less ductile. The slip values were equal to zero until the loads reached their final stages, while the specimen S20-55-1100 (short specimen) exhibited zero slip at all stages of the load. The ultimate load of the hollow steel tube composite beam was 13.2% lower than that of the reference beam. Moreover, the ductility and stiffness of the beam were also higher for beams with composite-filled steel tubes.

Słowa kluczowe

EN

concrete-filled steel tube; CFST; lightweight concrete; composite beam; perfobond-rib shear; connector; reinforced concrete; compressive strength; crack

PL

rura stalowa wypełniona betonem; CFST; beton lekki; belka kompozytowa; ścinanie perfobond-żebro; złącze; beton zbrojony; wytrzymałość na ściskanie; pęknięcie

• Wydawca: Komitet Inżynierii Lądowej i Wodnej PAN ; Politechnika Warszawska, Wydział Inżynierii Lądowej
• Czasopismo: Archives of Civil Engineering
• Rocznik: 2020
• Tom: Vol. 66, nr 2
• Strony: 235--251
• Opis fizyczny: Bibliogr. 23 poz., il., tab.

Twórcy

autor

Farhan Khawla A.

• University of Al-Qadisiyah, Civil Engineering Department, Al-Diwania, Iraq

autor

Shallal Muhaned A.

• University of Al-Qadisiyah, Civil Engineering Department, Al-Diwania, Iraq

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