Techno Press

Steel and Composite Structures   Volume 30, Number 2, January25 2019, pages 141-147
Behavior of steel-concrete composite beam using angle shear connectors at fire condition
Seyed Mehdi Davoodnabi, Seyed Mohammad Mirhosseini and Mahdi Shariati

Abstract     [Full Text]
    Fire is one of the environmental parameters affecting the structure causing element internal forces to change, as well as reducing the strength of the materials. One of the common types of floors in tall steel structures is the steel concrete composite slab. Shear connectors are used in steel and concrete composite beam in various shapes also has played significant role in a burning fire event of building with a steel concrete composite beam. The current study has reviewed the effects of temperature raising on the angle connector behavior through the use of push out tests and monotonic static force. The results have shown (1) the ductility of the samples is acceptable based on EC4 standard; (2) temperature raising has reduced the stiffness; (3) the shear ductility increment; and (4) the shear capacity reduction. Also, the amount of angle shear connector resistance has been decreased from 18.5% to 41% at ambient temperature up to 850°C.
Key Words
    composite steel-concrete beams; elevated temperatures; push-out tests; angle shear connectors; load-slip graphs
(1) Seyed Mehdi Davoodnabi, Seyed Mohammad Mirhosseini:
Department of Civil Engineering, Arak Branch, Islamic Azad University, Arak, Iran;
(2) Mahdi Shariati:
Faculty of Civil Engineering, University of Tabriz, Tabriz, Iran.

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