Simulation, Analysis and Applications of Structure with Multiple Trench Friction Pendulum System

• Main Authors: CHIA-CHI CHEN, 陳家奇
• Other Authors: Chung-Hsing Tsai
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/47849654609463402925

碩士 === 逢甲大學 === 土木工程所 === 96 === ABSTRACT The base isolation technology has been recognized as a feasible and promising way in mitigating the seismic responses of structures through the theoretical studies, experimental efforts and actual earthquake. After many years of study, base isolation technology has been proven to efficiently reduce the seismic responses and upgrades the earthquake-proof capability of the superstructure either from the theoretical studies, the experimental efforts or actual earthquake experiences. Therefore it has recently been used widely in the new or existing structures all around the world. In order to enhance the benefits of this technology, a new base isolator with variable isolation periods displacement capacity and damping effect, named as the Multiple Trench Friction Pendulum System (MTFPS) has been proposed in trench study. The proposed device is mainly composed of two intermediate trench sliding tracks, two trench concave surfaces and an articulated slider. It can isolate the seismic energy in virtue of the slider sliding back and forth on the intermediate trench sliding tracks. The MTFPS isolator can provide variable natural periods, displacement capacities and damping effects in any two independent directions. In order to verify the functionality of the proposed device, a series of shaking table tests of a three story steel structure isolated with MTFPS base isolators were performed at the Department of Civil Engineering, Feng Chia University, Taichung, Taiwan. The experimental results show that the proposed isolator can mitigate the seismic response under various earthquakes. With pendulum curved track and the weight of the structure, the MTFPS isolator can go back to the original position with little residual displacements. The test results reveal that the proposed device can effectively upgrade the seismic resistibility of a conventionally fixed -base structure. Keyword：Multiple Trench Friction Pendulum System、Base Isolation、Earthquake Engineering、Structural Control、Passive Control