Cable Bracing Design In Adaptable Dual
Control Systems
Author(s)
M. C. Phocas & T. L. Sophocleous
Abstract
Structural control through energy dissipation systems has been increasingly
implemented internationally in the last years and has proven to be a most
promising strategy for earthquake safety of structures. The present paper
examines an alternative control system development for achieving dynamic
structural adaptability. The prototype control system consists of a hysteretic
energy dissipation device of triangular steel plates and a tension-only bracing
with closed circuit realized through implementation of rotating discs at the
braces connections. A typical configuration design of the kinetic mechanism
consists of a portal- and a chevron cable bracing. Based on three representative
international strong earthquake motions of differing frequency contents,
parametric dynamic analyses of the SDOF system responses mainly
characterized by high energy dissipation have been performed by the authors in
previous studies with regard to the mechanical characteristics of the hysteretic
damper, i.e. elastic stiffness and yield force, whereas the cables were modelled as
frame objects with zero compression limit. In the present study the optimum
controlled system is further investigated in its earthquake responses with
different cable stiffness values and a pretension stress. The respective numerical
nonlinear analyses conducted exemplify the earthquake performance of the
bracing-damper mechanism, while a linear elastic resistance of the tension-only
members is verified.
Keywords: earthquake resistance, frame structures, passive control, cable
design.
Keywords
earthquake resistance, frame structures, passive control, cable
design
Related Book
Other papers in this volume
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