A PROPOSAL OF NEW TYPE OF STEEL-CONCRETE HYBRID SLAB STRUCTURE

Abstract

  This paper proposes a new type of steel-concrete hybrid slab structure. It consists of a steel deck, longitudinal flat ribs welded to the upper surface of the deck, reinforcing bars arranged on top of the ribs in two directions and concrete. Compsite action between the steel part and concrete is ensured using horizontally arranged round rods inserted in the steel ribs. The proposed sytem is lighter than conventional composite slab and PC slabs. In addition, it has a simple system, in which the fabrication procedure is easier than conventional steel deck plate. From experimental study, it is clarified that the newly employed round rod for connectors has higher strength compared to that stipulated in Japan Highway Bridge Specifications (JHBS). Through moving vechicle test, high durability of this new system is also confirmed.