Study on the seismic performance of a double spherical seismic isolation bearing

• Published in: Earthquake Engineering and Engineering Vibration Vol. 7; no. 4; pp. 439 - 446
• Main Authors: Peng, Tianbo, Li, Jianzhong, Xu, Yan, Fan, Lichu
• Format: Journal Article
• Language: English
• Published: Heidelberg Institute of Engineering Mechanics, China Earthquake Administration 01.12.2008; Springer Nature B.V; Department of Bridge Engineering,Tongji University,Shanghai 200092,China
• Subjects: Bridges; Civil Engineering; Control; Dynamical Systems; Earth and Environmental Science; Earth Sciences; Earthquakes; Energy dissipation; Geotechnical Engineering & Applied Earth Sciences; Numerical analysis; Seismic activity; Seismic response; Seismology; Structural engineering; Vibration; energy dissipation; continuous girder bridges; DSSI bearing; vertical displacement; seismic isolation
• ISSN: 1671-3664; 1993-503X
• DOI: 10.1007/s11803-008-1004-7

In this paper, the confi guration and working mechanism of the recently developed double spherical seismic isolation (DSSI) bearing are introduced in detail. Then, vertical displacement of the DSSI bearing due to sliding on a spherical surface is analyzed. The results from seismic performance testing of the bearing are given, and a numerical analysis of a four span continuous girder bridge is performed. The numerical analysis compares the influence of three different bearing arrangement schemes on the structural seismic response, and the results show that the DSSI bearing is effective in increasing the vertical load bearing capacity, reducing the vertical displacement, and controlling the energy dissipation capacity within a certain range.