A new type of hollow-shallow steel and concrete composite floor beam

Abstract

Recently in Vietnam, steel-concrete composite structures especially composite beams are widely constructed in high-rise buildings. To apply broader in construction field mainly in secondary beam systems, the new type of slim-floor composite beam is proposed to aim at reducing the cost, saving the raw material, and decreasing the overall floor depth for sustainable development orientation. This type of floor beam structure consists of built-up hollow-shallow steel beam mandatory connected with cast in situ concrete slab through the openings at both side of web along the beam. The shear connection level of composite beam is depended on not only the friction at the connected surface between hollow steel section and concrete but also the shear resistance of concrete dowels, which go through the openings. The paper deals with an innovative shape of cross-section and design philosophy of composite beam according to EN 1994-1-1.

Shear resistance determination of concrete dowel in shallow concrete-steel composite floor-beam based on push-out tests

“…2) to be able to combine with metal deck in composite slim floor structures. Recently, the CD-iZ is firstly applied in the floor beam system of a three-story building in HUCE campus [15], however, the composite action level is not yet well estimated. To understand the behavior and verify the longitudinal shear resistance of trapezoid dowel (CDiz), a series of push-out tests were conducted in LAS-XD 125.…”