Year: 2016
Type: article
Abstract: Seismic events have always been detrimental to civil engineering structures, with these events sometimes leading to structural collapse and loss of life.In order to mitigate these effects, innovative devices and design methods have been conceived.One recent method has called for the apparent weakening of the structure along with the addition of supplemental damping.This method aims to reduce the base shear, acceleration, and deformation of the structure by mimicking the post-yielding behavior.Apparent weakening is achieved through application of negative stiffness to emulate yielding before actual yielding of the structure occurs.Although there are negative stiffness devices (NSDs) that have been previouslyproposed, this research focuses on a new NSD, the variable passive negative stiffness device (VPNSD), that is capable of generating the ideal force versus displacement profile and improve upon drawbacks of past devices.This work will simulate the profile of this new device as well as the response of a single-degree-of-freedom structure equipped with the device and subject to various inputs.The results of the simulations showed that the VPNSD was able to create the ideal force versus displacement profile and provided reductions in base shear forces and accelerations of the model building structure.
Author: Evan M. Boso
Institution: Ohio University
Language: English
Subfield: Civil and Structural Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2604528839