Seimic Responses of Isolated Buildings with Supplemental Devices Subjected to Near-Fault Earthquake

• Main Authors: Cheng-Ching Wang, 王勝慶
• Other Authors: Wen-I Liao
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/njwuxd

碩士 === 國立臺北科技大學 === 土木與防災研究所 === 97 === Near-fault ground motions, which caused much of the damage in recent major earthquakes (Northridge 1994, Kobe 1995, Chi-Chi 1999), are characterized by a pulse-like motion that exposes the structure to high input energy at the beginning of the record. The first objective of this research is to compare the dynamic response of seismic isolated and non-isolated building structures subjected to near-fault ground motions. Two typical building structures with three story and eight story designed by Taiwan seismic design specifications of buildings are adopted for this study. Numerical results show that the seismic performance of isolated buildings is not better than the no-isolated one under some near-fault ground motions. Secondly, the isolated building structures retrofitted with supplemental elastic device (SED) or supplemental viscous damper device are analyzed. Parametric studies for the dynamic response of seismic isolated buildings with and without supplemental devices are developed. Analyzed results show that the parameters PGV/PGA ratio and spectral velocity may govern the building response characteristic for input near-fault pulse-like ground motions.