Plasticity-fibre model for steel triangular plate energy dissipating devices
Journal
Earthquake Engineering and Structural Dynamics
Journal Volume
31
Journal Issue
9
Pages
1643-1655
Date Issued
2002
Author(s)
Abstract
Properly fabricated triangular-plate added damping and stiffness (TADAS) devices can sustain a large number of yield reversals without strength degradation, thereby dissipating a significant amount of earthquake-induced energy. A pronounced isotropic-hardening effect is recognized in the force-deformation relationships of the TADAS devices made from two grades of low yield strength steel. The proposed plasticity-fibre model employing two surfaces (a yield surface and a bounding surface) in plasticity theory accurately predicts the experimental responses of the TADAS devices. This model is also implemented into a computer program DRAIN2D+ to investigate a frame response with the TADAS devices. Substructure pseudo-dynamic tests and analytical studies of a two-storey steel frame constructed with the low yield strength steel, LYP-100 or LYP-235 grade, TADAS devices confirm that the dynamic structural response can only be predicted if the proposed plasticity-fibre model is used for LYP-100 steel TADAS device. Copyright © 2002 John Wiley & Sons, Ltd.
Type
journal article