Seismic Response of Rolling Isolation Systems with Concave Friction Distribution

Abstract

This article attempted to improve the isolation performance of a rolling isolation system by assuming that the rolling friction force gradually and linearly increased with the relative displacement between the isolator and the ground. After the rolling isolation system under different ground motions was calculated by a numerical analysis method, it obtained more regular results than that of other uneven friction distributions. Results shows that the considered concavely distributed friction force can not only dissipate the earthquake energy, but also change the structural natural period. These functions improve the seismic isolation efficiency of the structural relative displacement in comparison with the general uniform distribution of rolling friction coefficient.

Keywords:

• Structure
• Earthquake
• Isolation
• Concave Friction Distribution
• Seismic Performance

Funding

This research received funding from the National Natural Science Foundation of China (Grant IDs: 51308549, 51378504, and 51478475), Innovation-driven Plan in Central South University (Grant ID: 2015CX006), Natural Science Foundations of Hunan Province (Grant ID: 2015JJ3159).

Additional information

Funding

This research received funding from the National Natural Science Foundation of China (Grant IDs: 51308549, 51378504, and 51478475), Innovation-driven Plan in Central South University (Grant ID: 2015CX006), Natural Science Foundations of Hunan Province (Grant ID: 2015JJ3159).