Title: Resilient isolation-structure systems with super-large displacement friction pendulum bearings

Authors: Jinping Ou; Peisong Wu; Xinchun Guan

Addresses: Key Lab of Structures Dynamic Behaviour and Control of the Ministry of Education, Harbin Institute of Technology, Harbin, 150090, China ' Key Lab of Structures Dynamic Behaviour and Control of the Ministry of Education, Harbin Institute of Technology, Harbin, 150090, China ' Key Lab of Structures Dynamic Behaviour and Control of the Ministry of Education, Harbin Institute of Technology, Harbin, 150090, China

Abstract: This paper presents a super-large displacement friction pendulum bearing (SLDFPB) and isolation system with SLDFPB. SLDFPB has one or several spherical shells of large span and large curvature radius as an integrated sliding isolation layer. Superstructure can sustain large horizontal displacement through relative sliding between large spherical shell and sliding blocks. The proposed SLDFPB has two main advantages: 1) avoid damage of isolation layer during super-strong earthquakes owing to large lateral deformation capability; 2) have better isolation effectiveness because of smaller horizontal stiffness and isolation frequency. This study also investigates mechanical property of SLDFPB including equivalent radius and equivalent friction coefficient. Suggested designed method of SLDFPB is given based on seismic mitigation and reset ability of isolation layer. Two isolation structure systems with multi isolation layers are studied. The results show that large ratio of mass and optimised parameters contribute to good control effect.

Keywords: friction pendulum bearing; sustainable structural system; isolation system; equivalent radius; equivalent friction coefficient.

DOI: 10.1504/IJSMSS.2021.115782

International Journal of Sustainable Materials and Structural Systems, 2021 Vol.5 No.1/2, pp.11 - 34

Received: 25 Apr 2020
Accepted: 25 Apr 2020
Published online: 22 Jun 2021 *