Experimental study on curved steel-concrete-steel sandwich shells under concentrated load by a hemi-spherical head

Deflection assessment of prestressed steel-concrete–steel sandwich panel: experiment and numerical simulation

“…The closer the connector, the stronger the composite effect between the steel plate and the concrete. 11,26 In addition, the specimen with dense connections has strong shear strength of the steel plate in the CDC zone, which delayed the formation of the CDC and the failure of the specimen. Compared with QP7, the ductility coefficients of QP6 and QP1 were increased by 6.6% and 12.1%, indicating that the sandwich panel with more shear connectors has enhanced resistance to deformation.…”

Axial compressive behaviours of steel–concrete-steel sandwich composite walls with novel enhanced C-channels

“…A c =Cross-sectional area of concrete core A s = Cross-sectional area of faceplate A sb = Cross-sectional area of bolt A sc = Cross-sectional area of web of C-channel A s,Ai ,B s,Bj ,C s,Ck= Width of the A, B and C strip of faceplates in Fig. 11 E Recently, steel-concrete-steel sandwich composite walls (SCSSCWs) become popular and have been put into use as shear walls in high-rise buildings [1][2][3], nuclear shielding walls [4][5], immersed tunnels [6][7], protective structures [8][9], and ice walls [10][11][12]. The representative form of SCSSCWs usually has two external steel faceplates and a sandwiched concrete core, which uses adhesive materials or connectors to bond them together as a composite structure.…”

“…At the ultimate load of 3991 kN, the local buckling occurred in positions ( 6)~( 8), and the concrete crushing became more seriously at the foot of specimen. In addition, the whole strip of faceplate along the width almost buckled between two rows of connectors at position (8). 4) connected and gradually merged; meanwhile, minor local buckling occurred to faceplate at position (5).…”

Numerical-based analytical model of double-layer steel-LHDCC sandwich composites under punching loads

“…Compared to conventional Reinforced Concrete (RC) structures, Steel-Concrete-Steel (SCS) sandwich structures show superior advantages, including higher ductility, integrity, load carrying capacity and energy absorption ability [1][2][3][4][5]. The external steel skin plates ensure impermeability of the structure and provide excellent impact and blast resistances [6][7][8][9][10]. In practice, SCS structures are commonly used as protective structures in nuclear engineering, shear walls and bridge decks in construction engineering, as well as marine and offshore structures like storages vessels, ship hulls, oil production platforms, etc.…”

“…The resistance due to flexural yielding was addressed according to the yield line theory, while the resistances due to punching shear failure of concrete and punching shear fracture of steel plate were solved by considering concrete, steel plate and shear connectors, independently. Some researchers have also investigated the behavior of curved SCS shells and developed relevant equations to predict their ultimate resistances [32][33][34][35].…”