SEISMIC DESIGN OF FRICTION DAMPED BRACED STEEL PLANE FRAMES BY ENERGY METHODS

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SEISMIC DESIGN OF FRICTION DAMPED BRACED STEEL PLANE FRAMES BY ENERGY METHODS

Author: ANDRE FILIATRAULT | Size: 13.2 MB | Format: PDF | Quality: Unspecified | Publisher: THE UNIVERSITY OF BRITISH COLUMBIA | Year: 1988 | pages: 340

The investigatio n described i n t h i s thesi s represents the f i r s tknown attempt to develop a s i m p l i f i e d method fo r the seismic design ofstructure s equipped with a novel f r i c t i o n damping system. The systemhas been shown experimentally to perform very wel l and i s an excitin g development i n earthquake resistan t design. The design of a buildin gequipped with the f r i c t i o n damping system i s achieved by determining the optimum s l i p load d i s t r i b u t i o n to minimize s t r u c t u r a l response. A new e f f i c i e n t numerical modelling approach fo r the analysi s and design of F r i c t i o n Damped Braced Frames (FDBF) i s presented. The hystereti c propertie s of the f r i c t i o n devices are derive d t h e o r e t i c a l l y and include d i n a F r i c t i o n Damped Braced Frame Analysi s Program (FDBFAP), which i s adaptable to a microcomputer environment. The optimum s l i p load d i s t r i b u t i o n i s determined by minimizing a Relativ e
Performance Index (RPI) derive d from energy concepts.
The steady-state response of a singl e storey f r i c t i o n damped structur e subjected to sinusoida l ground motion i s investigate d a n a l y t i c a l l y . Basic design informatio n on the optimum s l i p load fo r the f r i c t i o n device i s obtained. The parameters governing the optimum s l i p load, which minimizes the amplitude fo r any forcin g frequency, are derived. The study indicate s that the optimum s l i p load depends on the c h a r a c t e r i s t i c s of the ground motion and of the structure .

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