Modeling and Simulation of Resetting Semi-Passive Stiffness Damper

Abstract

The resetting semi-active stiffness damper (RSASD) has proven effective in reducing the seismic response of structures. However, it relies on a multi-component feedback control system that is subject to reliability issues. Recently, research was conducted to replace components of the system with a mechanism that enables a similar control performance. The resulting resetting semi-passive stiffness damper (RSPSD) offers increased reliability without compromising effectiveness. To date, a model of the RSPSD has been developed and simulations have been conducted to evaluate its control performance. It was found that implementing the resetting control law in a numerical environment is complicated by building drift displacements that are characterized by local peaks. The present work details the development of the control logic that is required for simulating resetting of the RSPSD control force. It is demonstrated through numerical simulations of two single-story buildings equipped with the RSPSD and subject to a sinusoidal excitation.