Damage-free engagement device for enhanced wind-resistance of base-isolated structures

A damage-free engagement device for enhanced wind-resistance of base-isolated structures, comprising:

• a rubber seismic isolation support (4) placed between a super-structure and a sub-structure of a seismic isolation layer, with an upper and a lower surfaces thereof respectively equipped with an upper connecting plate (1) and a lower connecting plate (2) configured to connect the super-structure and the sub-structure of the seismic isolation layer;
• a plurality of wind-resistance stiffness adjusters disposed between the upper connecting plate (1) and the lower connecting plate (2) and surrounding the rubber seismic isolation support (4), each wind-resistance stiffness adjuster comprises a horizontal sliding bearing plate (3) fixed on the upper connecting plate (1), a vertical guide groove (7) defined by two side walls disposed on the lower connecting plate (2), and components arranged within the vertical guide groove (7), comprising a bird beak plate (6) and a disc spring group (10) in sequence from top to bottom, the bird beak plate (6) is configured to slide up and down along the vertical guide groove (7), and an upper hook structure thereof fits and hooks with the horizontal sliding bearing plate (3), wherein the bird beak plate (6) has a comma-shaped body defined by a circular structure and the upper hook structure integrated with the circular structure, and the horizontal sliding bearing plate (3) has an L-shaped structure, and comprises a horizontal bar and protrusions located at an end of the horizontal bar, and the upper hook structure of the bird beak plate (6) engages with and hooks onto the protrusions of the horizontal sliding bearing plate (3) such that an interface therebetween forms an inclined slope surface.