Techno Press
You logged in as Techno Press

Earthquakes and Structures
  Volume 11, Number 1, July 2016, pages 25-43
DOI: http://dx.doi.org/10.12989/eas.2016.11.1.025
 


Seismic response of spring-damper-rolling systems with concave friction distribution
Biao Wei, Peng Wang, Xuhui He and Lizhong Jiang

 
Abstract
    The uneven distribution of rolling friction coefficient may lead to great uncertainty in the structural seismic isolation performance. This paper attempts to improve the isolation performance of a spring-damper-rolling isolation system by artificially making the uneven friction distribution to be concave. The rolling friction coefficient gradually increases when the isolator rolls away from the original position during an earthquake. After the spring-damper-rolling isolation system under different ground motions was calculated by a numerical analysis method, the system obtained more regular results than that of random uneven friction distributions. Results shows that the concave friction distribution can not only dissipate the earthquake energy, but also change the structural natural period. These functions improve the seismic isolation efficiency of the spring-damper-rolling isolation system in comparison with the random uneven distribution of rolling friction coefficient, and always lead to a relatively acceptable isolation state even if the actual earthquake significantly differs from the design earthquake.
 
Key Words
    structure; isolation; concave friction distribution; spring; damper; seismic performance
 
Address
Biao Wei, Peng Wang, Xuhui He and Lizhong Jiang: School of Civil Engineering, Central South University, 22 Shaoshan South Road, Changsha, China

Biao Wei, Peng Wang, Xuhui He and Lizhong Jiang: National Engineering Laboratory for High Speed Railway Construction, 22 Shaoshan South Road, Changsha, China
 

Techno-Press: Publishers of international journals and conference proceedings.       Copyright © 2021 Techno Press
P.O. Box 33, Yuseong, Daejeon 305-600 Korea, Tel: +82-42-828-7996, Fax : +82-42-828-7997, Email: info@techno-press.com