Seismic performance of isolation system of rolling friction with springs
来源期刊：中南大学学报(英文版)2014年第4期
论文作者：WEI Biao(魏标) DAI Gong-lian(戴公连) WEN Ying(文颖) XIA Ye(夏烨)
文章页码：1518 - 1525
Key words：structure; seismic isolation; rolling friction; spring
Abstract: In order to study an isolation system of rolling friction with springs, computer programs were compiled to evaluate the seismic performance based on its movement characteristics. Through the programs, the influences of various seismic performance factors, e.g., rolling friction coefficient, spring constant, were systematically investigated. Results show that by increasing the rolling friction coefficient, the structural relative displacement due to seismic load effectively decreases, while the structural response magnitude varies mainly depending on the correlations between the following factors: the spring constant, the earthquake intensity, and the rolling friction coefficient. Furthermore, increasing the spring constant can decrease the structural relative displacement, as well as residual displacement, however, it increases the structural response magnitude. Finally, based on the analyses of various seismic performance factors subjected to the scenario earthquakes, optimized theoretical seismic performance can be achieved by reasonably combining the spring constant and the rolling friction coefficient.
WEI Biao(魏标)1, DAI Gong-lian(戴公连)1, WEN Ying(文颖)1, XIA Ye(夏烨)2
(1. School of Civil Engineering, Central South University, Changsha 410075, China;
2. Department of Civil and Environment Engineering, The State University of New Jersey, Piscataway 08854, USA)
Abstract:In order to study an isolation system of rolling friction with springs, computer programs were compiled to evaluate the seismic performance based on its movement characteristics. Through the programs, the influences of various seismic performance factors, e.g., rolling friction coefficient, spring constant, were systematically investigated. Results show that by increasing the rolling friction coefficient, the structural relative displacement due to seismic load effectively decreases, while the structural response magnitude varies mainly depending on the correlations between the following factors: the spring constant, the earthquake intensity, and the rolling friction coefficient. Furthermore, increasing the spring constant can decrease the structural relative displacement, as well as residual displacement, however, it increases the structural response magnitude. Finally, based on the analyses of various seismic performance factors subjected to the scenario earthquakes, optimized theoretical seismic performance can be achieved by reasonably combining the spring constant and the rolling friction coefficient.
Key words:structure; seismic isolation; rolling friction; spring
