ABSTRACT
This chapter 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. Superstructures can sustain large horizontal displacement through relative sliding between the large spherical shell and sliding blocks under nondeformable frame columns. The proposed SLDFPB has three main advantages: i) avoid damage of isolation layer under super strong earthquakes owing to large horizontal deformation capability; ii) have a better isolation effect because of smaller horizontal stiffness and isolation frequency comparing with classic FPB; and iii) increase overturning resistance due to rotation motion of the superstructure and provide a good isolation effect corresponding to high rise structure. This study also investigates the mechanical properties of SLDFPB. The equivalent radius is smaller than the radius of a spherical shell, and the equivalent friction coefficient is larger than the friction coefficient of a spherical shell. A suggested design method of SLDFPB is given based on its isolation effect and the reset ability of the isolation layer. Two isolation structure systems with multi-isolation layers are studied. The results show that a large ratio of mass and optimized parameters contribute to a good control effect.
