Horizontal shearing locking shock isolation device

Abstract

The invention relates to a horizontal shearing locking shock isolation device. The horizontal shearing locking shock isolation device comprises an upper body, hexagon socket cap screws, shear pins, a middle body, hexagon bolts, flat washers, hexagon socket cap screws, a lower body, a rubber rod, a sleeve and a cushion plate. The upper body and the upper structure are fixed through the hexagon bolts, the shear pins penetrate through the upper body and the middle body to be used for bearing horizontal shear force, the middle body and the rubber rod are connected, pre-tension force is applied to the middle body through the hexagon socket cap screws, the rubber rod is in a pre-tensioned state, and the sleeve limits horizontal motion of the middle body. Furthermore, the cushion plate and the rubber rod are bound through the vulcanization technology, pre-tension force is generated after the hexagon socket cap screws are tightened, the rubber rod is in a tensioned state through the pre-tension force, and therefore the purpose that the lower half portions of the shear pins rebound downwards after the shear pins are sheared off, and normal hysteresis of a rubber support is not affected is achieved.

Description

technical field [0001] The invention belongs to the field of shock absorption and isolation of building structures, in particular to a horizontal shear locking device. Background technique [0002] The nuclear power plant structure is a special structural system, and earthquake is one of the biggest threats to its safety. When subjected to an earthquake, all structures, systems, components and equipment of a nuclear power plant are excited almost simultaneously, which will endanger the integrity of the structure and the integrity of the functions of the equipment and components. [0003] The loss of life and property caused by the severe earthquake is shocking. If a severe earthquake occurs in the area where the nuclear power plant is located, the consequences will be disastrous. In 1999, the Jiji Earthquake shut down two units of the Taiwan No. 1 Nuclear Power Plant. In 2007, the Niigata Earthquake in Japan led to the closure of the Kashiwazaki Kariwa Nuclear Power Plant. ...

AI Technical Summary

Problems solved by technology

Seismic isolation can effectively reduce the acceleration seismic response of the nuclear island, but at the same time, the excessive displacement of the seismic isolation layer may cause the pipelines entering and leaving the nuclear island to break, which is likely to cause secondary damage

This has become a key issue limiting the application of seismic isolation technology in nuclear power structures

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