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A platform for research: civil engineering, architecture and urbanism
Compressive behaviours of steel-UHPC-steel sandwich composite walls using novel EC connectors
Abstract This paper reports the developments of steel-UHPC-steel sandwich composite walls with novel EC connectors (SUSSCW-ECs). The ECs in SUSSCW-ECs directly linked the two faceplates that enhance the composite action of the composite wall. Axial compression tests on 11 SUSSCW-ECs to investigate their compressive behaviours, and the selected key influencing parameters in the testing program included layout of C-channels, steel faceplate thickness, horizontal and vertical spacing of ECs, and strength of core. Under compression, the SUSSCW-ECs exhibited an elastic-plastic-recession three-stage working mechanism. Tests results show that major local buckling of faceplates ended the elastic stage, and UHPC crushing occurred at the peak compression resistance of SUSSCW-ECs. Installing the ECs with horizontal webs exhibited larger axial compression resistance of SUSSCW-ECs than those with V-web ECs. Increasing the steel faceplate thickness improved compressive behaviours of SUSSCW-ECs. Increasing horizontal and vertical spacing of EC connectors resulted in reduced ultimate compressive resistance of SUSSCW-ECs. Using UHPC improves both peak resistance and elastic stiffness of sandwich composite walls. Finally, this paper developed theoretical models to predict ultimate compressive resistance of SUSSCW-ECs, and validations against 11 test results showed their reasonable estimations.
Graphical abstract Display Omitted
Highlights Steel-UHPC-steel sandwich walls with enhanced C-channels (SUSSCW-ECs) are developed. Horizontally installed enhanced C-channels (ECs) offer higher compression resistance. Increasing spacing of ECs reduces compression resistance of SUSSCW-ECs. Using UHPC improves both peak resistance and elastic stiffness of SUSSCW-ECs. Developed analytical models predict well compression resistance of SCSSCW-ECs.
Compressive behaviours of steel-UHPC-steel sandwich composite walls using novel EC connectors
Abstract This paper reports the developments of steel-UHPC-steel sandwich composite walls with novel EC connectors (SUSSCW-ECs). The ECs in SUSSCW-ECs directly linked the two faceplates that enhance the composite action of the composite wall. Axial compression tests on 11 SUSSCW-ECs to investigate their compressive behaviours, and the selected key influencing parameters in the testing program included layout of C-channels, steel faceplate thickness, horizontal and vertical spacing of ECs, and strength of core. Under compression, the SUSSCW-ECs exhibited an elastic-plastic-recession three-stage working mechanism. Tests results show that major local buckling of faceplates ended the elastic stage, and UHPC crushing occurred at the peak compression resistance of SUSSCW-ECs. Installing the ECs with horizontal webs exhibited larger axial compression resistance of SUSSCW-ECs than those with V-web ECs. Increasing the steel faceplate thickness improved compressive behaviours of SUSSCW-ECs. Increasing horizontal and vertical spacing of EC connectors resulted in reduced ultimate compressive resistance of SUSSCW-ECs. Using UHPC improves both peak resistance and elastic stiffness of sandwich composite walls. Finally, this paper developed theoretical models to predict ultimate compressive resistance of SUSSCW-ECs, and validations against 11 test results showed their reasonable estimations.
Graphical abstract Display Omitted
Highlights Steel-UHPC-steel sandwich walls with enhanced C-channels (SUSSCW-ECs) are developed. Horizontally installed enhanced C-channels (ECs) offer higher compression resistance. Increasing spacing of ECs reduces compression resistance of SUSSCW-ECs. Using UHPC improves both peak resistance and elastic stiffness of SUSSCW-ECs. Developed analytical models predict well compression resistance of SCSSCW-ECs.
Compressive behaviours of steel-UHPC-steel sandwich composite walls using novel EC connectors
Yan, Jia-Bao (author) / Chen, Anzhen (author) / Wang, Tao (author)
2020-06-26
Article (Journal)
Electronic Resource
English
UHPC wall , Composite wall , Sandwich structures , Connectors , Compression tests , Steel-concrete composite , CC , concrete crushing , COV , coefficient of variation , CS , concrete splitting , DI , ductility index , EC , enhanced C-channels , LVDTs , linear varying displacement transducers , NWC , normal weight concrete , RC , reinforced concrete , SCS , steel-concrete-steel , SCSSCWs , steel-concrete-steel sandwich composite walls , SCSSSs , SCS sandwich structures , SCSSCW-ECs , SCSSCW with ECs , SUSSCW-ECs , steel-UHPC-steel sandwich composite walls with novel ECs , TTP , test-to-prediction , UHPC , ultra-high performance concrete
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