Innovative hybrid and composite steel-concrete structural solutions for building in seismic area
Building use
Other
Country/Region
All Regions
Overview
The proposed innovative SRCW is characterized by elements with specific tasks by allowing for the execution of a proper capacity design. The design procedure is force-based and is applied by considering the simple statically determined scheme representing the limit behavior of the SRCW presented in the study.
Basic information (construction date, number of stories, gross floor area, adopted design code, engineer(s), Contractor(s), etc.)
Construction date: only designed in 2013
Number of stories: basement + 6 above ground
Gross floor area: 2,200m2
Adopted design code: Eurocode
engineer(s): Andrea Dall’Asta, Graziano Leoni, Alessandro Zona University of Camerino
Contractor(s): –
Issue and/or innovation
To provide accessible guidelines on the design and construction of Hybrid coupled shear walls (HCSW) and steel frames with reinforced concrete infill walls (SRCW), described in the Eurocode 8 but not extensively used.
Reason for composite solution
Composite solutions are often used to build earthquake resistant buildings and thoroughly described in section 7 of Eurocode 8: Specific rules for composite steel-concrete buildings.
Technical details
The research aims to define innovative steel reinforced concrete hybrid systems for the construction of feasible and easy repairable earthquake-proof buildings exploiting the best properties of both steel and concrete construction techniques by combining them in the most efficient way possible. Hybrid coupled shear walls (HCSW) and steel frames with reinforced concrete infill walls (SRCW) have been considered. In the case of SRCWs, solutions aimed at obtaining an adequate post-elastic behavior under seismic actions have been defined. A design procedure capable of furnishing stiffness ratios between components, strength and ductility demand of dissipative zones has been developed. Suitable over-strength connection systems between boundary side steel elements and r.c. infill shear panels have been defined. Specimens of the shear connection have been tested under monotonic loads and specimens of side steel element have been tested under cyclic loadings and, finally, one downscaled specimen of two-storey SRCW has been tested to fully characterize the behavior of the system under seismic actions. Experimental based realistic models to be applied in the global structural analysis will be developed. The efficiency of the proposed design provisions (HCSW and SRCW) have been evaluated by means of nonlinear static and dynamic analyses, considering different number of storeys and different geometries of the coupled system to furnish a wide overview of situations of interest in European seismic prone areas. The ductility demands at storeys and their compatibility with connection ductility has been analyzed in both cases in order to establish the global ductility of the structural systems. The two innovative solutions and the relevant design procedures has been applied to a case study by developing two complete designs of all structural and non-structural elements (constructive details). The related construction sequences and an estimation of the costs of construction and maintenance are presented in the report.
Specific solution/technical details
The considered solution for the SRCW system is made of a portal frame with HEA 260 and HEA 140 profiles acting as columns (bottom to top of the building) and HEB 220 profiles as horizontal links between the two vertical columns. S235 steel is used. Concrete is supposed to crush and dissipate the seismic energy and C30 concrete is used with B450C reinforcements.
References / Technical Papers Content
European Commission: Directorate-General for Research and Innovation, Zona, A., Boni, P., Degée, H., Leoni, G. et al., Innovative hybrid and composite steel-concrete structural solutions for building in seismic area (INNO-HYCO) – Final report, Publications Office, 2015, https://data.europa.eu/doi/10.2777/85404
References / Technical Papers
References / Technical Paper - 1
Categories
Building, Wall