Design of innovative seismic-resistant steel-concrete hybrid coupled shear walls

摘要

An innovative hybrid coupled shear wall (HCSW) system obtained coupling a reinforced concreternwall with two side steel columns connected by means of steel links at each floor is presented. Thernreinforced concrete wall is designed to undergo limited damages while the steel links connected tornthe wall are the only dissipative elements and can be easily replaced if damaged after a seismicrnevent. A significant part of the overturning moment is resisted by an axial compression - tensionrncouple developed by the two side steel columns while almost all the horizontal shear and only arnfraction of the overturning moment are resisted by the wall. Such hybrid system might represent arncost- and time-effective type of construction since simple beam-to-column connections could bernused for the steel frame constituting the gravity-resisting part and traditional and well-knownrnbuilding techniques are required for the reinforced concrete and steel components. The problemsrnencountered in the design of the presented HCSW system are discussed and a specific performancebasedrndesign method is presented and applied to the design of a realistic case study. Incrementalrnnonlinear dynamic analyses are performed to assess the behaviour of the proposed innovativernstructural system in seismic areas and validate the proposed design procedure.