A new composite floor system was developed to reduce floor-to-floor height and to improve structural capacity and fire resistance as compared with existing encased composite floor systems. The proposed system is composed of asymmetric steel beams with web openings, a biaxial hollow concrete slab, and glass fiber-reinforced plastic (GFRP) plates. The shear resistance of the typical composite beams is commonly determined based on the shear strength of the steel web alone. However, for the proposed system, because the steel web has several circular openings, the concrete contribution to the shear resistance should be included in the design equation. In this paper, tests and finite-element analyses were conducted to evaluate the contribution of the shear-resisting components in the proposed system. An asymmetric steel beam with web openings, inner concrete panels, and a biaxial hollow concrete slab within the effective width for shear were considered as shear-resisting components. Each component fully resisted the applied shear force, exceeding the expected value until failure, and the design equation suggested was suitable for predicting the shear strength of the proposed system.
|Journal of Structural Engineering (United States)
|Published - 2017 Feb 1
Bibliographical noteFunding Information:
This research was supported by a grant from the Korea University, the National Research Foundation of Korea (NRF-2013R1A2A2A01067872), and Architecture & Urban Development Research Program funded by Ministry of Land, Infrastructure and Transport of Korean government (15AUDP-B100343-01). The writers are grateful to the authorities for their support.
© 2016 American Society of Civil Engineers.
- Biaxial hollow concrete slab
- Composite beam
- Composite floor
- Glass fiber-reinforced plastic (GFRP) plate
- Metal and composite structures
- Reduced story height
- Shear capacity
ASJC Scopus subject areas
- Civil and Structural Engineering
- Building and Construction
- General Materials Science
- Mechanics of Materials
- Mechanical Engineering