Double skin composite construction

Double skin composite (DSC) construction or Steel/concrete/steel sandwich construction (SCSS) is an innovative and relatively new form of composite construction that can be used in submerged tube tunnels, bridges deck, nuclear structures, liquid and gas containment structures, offshore and onshore structures, military shelters, and shear walls in buildings. The system consists of a plain concrete core sandwiched between two steel plates interconnected together by various types of mechanical shear connectors. The DSC construction perceives advantages that the external steel plates act as both formwork and primary reinforcement, and also as impermeable, blast and impact resistant membranes. The major duty of the shear connectors is to withstand longitudinal shear force and beam/slab separation, while in the bi-steel type where shear connectors are friction welded at both their two ends to two parallel steel plates, the longitudinal and transverse shear force, as well as plate buckling are resisted. The present paper highlights the previous prime researches concerning the subjects of SCSS composite construction, specifically on the conducted tests (push-out tests, tensile, direct shear tests, and bending tests) in which the components of partial interaction (uplift and slip forces) are resisted by various types of shear connectors.

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Shear connection between concrete and thin steel plates in double skin composite construction

Thin-Walled Structures - Advances and Developments ◽

10.1016/b978-008043955-6/50036-7 ◽

2001 ◽

pp. 339-346

Author(s):

Howard D. Wright ◽

Anwar Elbadawy ◽

Roy Cairns

Keyword(s):

Steel Plates ◽

Composite Construction ◽

Shear Connection ◽

Thin Steel ◽

Double Skin

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Reducing Roof Solar Heat Gain by Using Double-Skin Ventilated Roofs

Engineering and Technology Journal ◽

10.30684/etj.v38i3a.462 ◽

2020 ◽

Vol 38 (3A) ◽

pp. 402-411

Author(s):

Mohannad R. Ghanim ◽

Sabah T. Ahmed

Keyword(s):

Inclination Angle ◽

Convection Heat Transfer ◽

Ventilation Rate ◽

Channel Length ◽

Air Gap ◽

Galvanized Steel ◽

Heat Gain ◽

Solar Heat ◽

Double Skin ◽

Solar Heat Gain

Double skin ventilated roof is one of the important passive cooling techniques to reduce solar heat gain through roofs. In this research, an experimental study was performed to investigate the thermal behaviour of a double skin roof model. The model was made of two parallel galvanized steel plates. Galvanized steel has been used in the roof construction of industrial buildings and storehouses in Iraq. The effect of inclination angle (ϴ) from the horizontal and the spacing (S) between the plates was investigated at different radiation intensities. It is found that using a double skin roof arrangement with a sufficient air gap (S) can reduce the heat gain significantly. The higher the inclination angle (ϴ) the higher the ventilation rate, the lower the heat gain through the roof. In this study, increasing the air gap from 2 cm to 4 cm reduced the heat gain significantly but when the gap was further increased to 6 cm, the reduction in the heat flux was insignificant. A dimensionless correlation was also reduced between Nusselt number () and the single parameter where L is the channel length. This correlation can be handily utilized for designing of engineering applications dealing with high temperature difference natural convection heat transfer.

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