Parametric study on damage control design of SMA dampers in frame-typed steel piers

Abstract

This paper focuses on damage control design of SMA dampers in steel frame piers. A parametric study based on time history analyses is carried out on frame-typed bridge piers with axial-type SMA damping device. The parameters examined are design parameters of strength ratio α_F and stiffness ratio α_K. Seismic performance indexes on displacement and strain are investigated under three JRA recommended Level 2 Ground Type П strong earthquake motions. Design recommendations are suggested following the results of the parametric study.

Keywords

damage control design / shape memory alloy / parameter study / displacement-based verification / strain-based verification / time history analysis