Fixed three-layer composite shock absorber

Abstract

The invention discloses a fixed three-layer composite shock absorption device. The fixed three-layer composite shock absorption device comprises an upper seat plate, an upper pendulum, block assemblies, connection hinge shafts, a spherical pendulum and a lower pendulum, wherein the upper pendulum and the upper seat plate slide relative to each other to form a plane slide layer; the upper pendulum and the spherical pendulum rotate relative to each other to form a rotation layer; the spherical pendulum and the lower pendulum swing relative to each other to form a swinging layer; the upper seat plate and the upper pendulum, the upper pendulum and the spherical pendulum, and the spherical pendulum and the lower pendulum form a three-layer composite structure; four block assemblies are provided and are respectively arranged at two transverse sides and two longitudinal sides of the upper seat plate, the upper part of each block assembly is separated from the upper seat plate, and the lower part of each block assembly is fixed on the lower pendulum through the corresponding connection hinge shaft. When in normal work, the spherical pendulum does not rotate, and a beam end does not move in the vertical direction, so that the stabilization of a bridge is facilitated; when in earthquake, the upper seat plate can be transitioned smoothly without impact; when shearing forces in both the transverse direction and the longitudinal direction of each block assembly are in failure, the free swinging of the whole shock absorption device can be realized.

Description

technical field [0001] The invention relates to a device capable of effectively damping shocks during an earthquake, in particular to a fixed three-layer composite shock absorbing device, which belongs to the field of shock absorbing technology. Background technique [0002] At present, bridge damping devices with shock absorption mainly include friction damping devices, mild steel damping devices, rubber damping devices, etc. Friction damping device is one of the common shock absorbing devices. It has the characteristics of large vertical bearing capacity, obvious energy consumption, strong reset function, large rotation angle and large displacement. The mild steel damping device has a good shock absorption effect, but its post-earthquake restoration is poor; the rubber damping device has a good shock absorption effect and post-earthquake restoration, but the rubber is easy to age and has a short service life. Contents of the invention [0003] The purpose of the present...

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Problems solved by technology

Friction damping device is one of the common shock absorbing devices. It has the characteristics of large vertical bearing capacity, obvious energy consumption, strong reset function, large rotation angle and large displacement. Secondary stress generated by the body; mild steel damping device has better shock absorption effect, but poor reset after earthquake; rubber damper has good shock absorption effect and reset after earthquake, but rubber is easy to age and has a short service life

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