Structural behavior of alternative low floor height system using structural "tee," half precast concrete, and horizontal stud

Conventional composite construction consisting of steel beams and concrete slabs has been widely used throughout the world. When compared with a concrete flat-slab structure, however, the reduced beam height is a signif- icant problem and is particularly important in a city where land prices are higher because a height reduction of 15 cm per storey can lead to a 750 cm reduction in the total height for a 50 storey building (equivalent to two storeys). In this paper a newly developed composite beam, the technical, economical, and convenient (TEC) beam, is proposed and experimentally investigated using a series of monotonic loading tests. The results show that the capacity of the pro- posed system is in agreement with design code predictions, and the system demonstrates a reliable composite behavior between steel beam and concrete slab. Resume : La construction composite conventionnelle consistant en poutres d'acier et en dalles de beton a ete largement utilisee dans le monde. Cependant, lorsqu'elle est comparee a une structure avec plancher plan en beton, la hauteur de poutre reduite est l'un des problemes les plus importants. Il est particulierement important dans une ville ou les prix des terrains sont plus eleves, puisqu'une reduction de 15 cm par etage peut mener a une reduction totale de 750 cm sur la hauteur d'un immeuble de 50 etages, ce qui equivaut a deux etages de l'immeuble. Le present article propose une nouvelle poutre composite, la poutre TEC. Cette poutre est etudiee experimentalement en utilisant une series d'essais de chargement monotone. Les resultats montrent que la resistance du systeme propose respecte les previsions des codes de conception et que le systeme presente un comportement composite fiable entre la poutre d'acier et le beton. Mots cles : poutre composite, structure d'acier, chargement monotone, resistance a la flexion. (Traduit par la Redaction) Ju and Kim 338

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