Double-curvature seismic isolation and reduction spherical bearing with high damping

Abstract

The invention aims to provide a double-curvature seismic isolation and reduction spherical bearing with high damping. A damping device and a corresponding motion device are additionally arranged on the basis of an existing double-curvature seismic isolation and reduction spherical bearing to increase damping of the bearing when an earthquake occurs and dissipate earthquake energy, so that seismicreduction and seismic isolation of the bearing are effectively combined, seismic isolation and reduction functions of the bearing are substantially improved, and displacement of the bearing after theearthquake is effectively controlled. The double-curvature seismic isolation and reduction spherical bearing with high damping has a good seismic isolation function of the double-curvature seismic isolation and reduction spherical bearing and an automatic reset function after the earthquake, meanwhile, damping force of the bearing is increased by the damping device, ground motion peak accelerationof a bridge is reduced, structural safety of the bridge is effectively guaranteed, meanwhile, the damping device has a good energy dissipation effect, and therefore, earthquake energy of the bridge can be substantially reduced. The double-curvature seismic isolation and reduction spherical bearing with high damping has a full hysteretic curve, has greater energy-dissipating capacity than the double-curvature seismic isolation and reduction spherical bearing and other anti-seismic products and is particularly suitable for a bridge anti-seismic structure in an area with high intensity and longfield period.

Description

technical field [0001] The invention belongs to the field of bridges and building structures, and relates to a hyperboloid spherical shock-absorbing and isolating support product with a large damping function. Background technique [0002] In recent years, with the development of bridge anti-seismic design technology, more and more bridges need to adopt shock-absorbing design schemes. At present, common shock-absorbing products include lead rubber bearings, high-damping rubber bearings, friction pendulum bearings and Metal nonlinear energy-dissipating bearings, etc. Among them, the disadvantages of lead core bearings and high-damping rubber bearings are low initial stiffness, small seismic displacement, and poor durability. They are rarely used in important bridges, and metal nonlinear energy-dissipating bearings have greater The initial rigidity and excellent energy dissipation, but after the earthquake, the damping pair has obvious elastic-plastic deformation and cannot be...

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Problems solved by technology

[0002] In recent years, with the development of bridge anti-seismic design technology, more and more bridges need to adopt shock-absorbing design schemes. At present, common shock-absorbing products include lead rubber bearings, high-damping rubber bearings, friction pendulum bearings and Metal nonlinear energy-dissipating bearings, etc. Among them, the disadvantages of lead core bearings and high-damping rubber bearings are low initial stiffness, small seismic displacement, and poor durability. They are rarely used in important bridges, and metal nonlinear energy-dissipating bearings have greater The initial rigidity and excellent energy dissipation, but after the earthquake, the damping pair has obvious elastic-plastic deformation and cannot be automatically reset. The metal damping pair needs to be replaced, and the use is limited. The friction pendulum support has good shock absorption and shock isolation functions. , and has the function of self-recovery after the earthquake, it is an ideal bridge anti-seismic product, but because the friction coefficient of the friction pendulum bearing is small, the damping is small, and the energy dissipation capacity is limited, it is difficult to control the post-seismic displacement of the bridge in high-intensity areas

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