Porous lead rubber bearing with high damping capacity and large bearing capacity

Abstract

The invention discloses a porous lead rubber bearing with high damping capacity and large bearing capacity and relates to a passive seismic reducing device. The porous lead rubber bearing comprises multiple steel plate layers, multiple rubber layers and cylindrical leads, wherein diameters of the steel plate layers and the rubber layers are the same, the steel plate layers and the rubber layers are alternately arranged from top to bottom, the multiple cylindrical leads penetrate through the steel plate layers and the rubber layers and are uniformly distributed in the circumferential direction of the bearing, circle centers of all the leads are located on a concentric circle of the bearing, and the diameter of the concentric circle is 56%-66% of that of the bearing. The porous lead rubber bearing has properties superior to the requirement for high seismic energy absorption, self-centering and normal functions under thermal deformation of a traditional bearing and meets an average ground displacement (about 500 mm) limit value under the action of M9 earthquake (with the peak acceleration of 0.62 g) in the code for seismic design of China, and the bearing capacity meets the requirement that vertical bearing capacity is not lower than 10,000 KN under the condition that surface pressure of the bearing for major precautionary category engineering is not higher than 12 MPa. The porous lead rubber bearing with high damping capacity and large bearing capacity can be widely applied to fields of seismic reduction and seismic isolation and the like of a large LNG (liquefied natural gas) storage tank, a large-span and single-pier bridge, a super high-rise building and a nuclear island of a nuclear power plant.

Description

technical field [0001] The invention relates to a shock-absorbing device, in particular to a porous lead-core laminated rubber shock-isolation bearing, which belongs to the technical field of shock-absorbing devices. Background technique [0002] Earthquake disasters are sudden and devastating, which seriously threaten the safety of human life and property. Historically, my country's earthquake disaster ranks first in the world, which is characterized by high frequency, large magnitude and wide distribution. In the 20th century, more than 600 earthquakes of magnitude 6 or above occurred in my country. More than one-third of my country's territory and more than half of large and medium-sized cities are located in areas with seismic fortification intensity of seven degrees or above. At present, my country's earthquakes are still very active. Since 1998, there have been more than 10 earthquakes of magnitude 7 or above and more than 50 earthquakes of magnitude 6 or above. [...

AI Technical Summary

Problems solved by technology

[0005] The invention solves the problems of low tensile bearing capacity, poor stability of single support, and insufficient utilization of lead damping caused by uneven vulcanization of rubber inside the traditional large-diameter (about 1500mm or larger) single-hole lead rubber bearing. Applied to large-scale LNG storage tanks, long-span single-pier bridges, super high-rise buildings, nuclear power plant nuclear island structure shock absorption and other fields

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