Elastic-plastic beam dropping prevention spherical steel support seat

Abstract

The invention belongs to the technical field of spherical steel support seats, in particular to an elastic-plastic beam dropping prevention spherical steel support seat. The invention adopts the technical scheme that a press plate forming an integral structure with an upper slide plate is arranged on the upper slide plate positioned outside the outer side wall of a first slide rail; an elastic-plastic column is arranged on a bottom plate; the top end of the elastic-plastic column is butted below the press plate; a second slide rail along the limiting direction of the support seat is arranged on the bottom plate at the outer side of the base; and the edge of the base is clamped into the second slide rail. After being sheared by a shear force pin, the elastic-plastic column generates elastic deformation so as to reduce the horizontal shearing force; and along with the increase of the force, the elastic-plastic column generates plastic deformation so as to further reduce the horizontal shearing force, thereby preventing a beam dropping phenomenon caused by an earthquake or bridge surface impact.

Description

technical field [0001] The invention belongs to the technical field of bridge supports, and in particular relates to an elastic-plastic anti-drop beam spherical steel support. Background technique [0002] At present, in order to prevent damage to the support due to normal horizontal shear force, the unidirectional limit spherical steel support used can allow a certain distance to move in one direction, but no displacement can occur in the direction perpendicular to this direction. In order to achieve the above purpose, shear pins are installed at the four corners of the base and bottom plate. When an earthquake occurs or an external force hits the bridge deck, a shear force occurs in the limit direction of the support, causing the shear pins to break. At this time, the bridge of the bridge The bridge piers will be removed on the surface, causing the bridge deck to collapse, which will not only cause huge economic losses, but also may cause huge casualties. Contents of the...

AI Technical Summary

Problems solved by technology

In order to achieve the above purpose, shear pins are installed at the four corners of the base and bottom plate. When an earthquake occurs or an external force hits the bridge deck, a shear force occurs in the limit direction of the support, causing the shear pins to break. At this time, the bridge of the bridge The bridge piers will be removed from the surface, causing the bridge deck to collapse, which will not only cause huge economic losses, but also may cause huge casualties

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