DUAL STEEL FRAMES WITH RE-CENTERING CAPACITY AND REPLACEABLE STEEL SHEAR PANELS

Abstract eng:
Structures that have replaceable thin-walled steel shear panels are efficient structural systems for resisting seismic loads owing to their high initial stiffness and reliable energy dissipation capacity. In order to reduce the economic losses (loss of building operation, cost of repairing), the dissipative system may be designed to be easily removed and replaced if damaged by an earthquake. When the shear panels and moment resisting frames are used together (dual system), allowing the moment resisting frame to remain in elastic reduces the residual displacement after an earthquake and provides the re-centering capacity that is required for removing and replacing the damaged walls. The paper presents the concept of re-centering dual systems with thin-walled steel shear walls and link beams. The main steps of the design process are presented using case studies with application examples to buildings that have different configurations. The seismic performance is investigated using nonlinear static and/or dynamic analyses.

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