Multi-directional coordinated rotating fixed bridge support

Abstract

The invention discloses a multi-directional coordinated rotating fixed bridge support, comprising an upper support plate, a spherical crown lining plate and a lower support plate, wherein a bridge forward-direction rotating block and a bridge cross-direction rotating block are arranged between the inner side wall of a check block of the upper support plate and the outer edge periphery of the top of the lower support plate; the outer side faces of the bridge forward-direction rotating block and the bridge cross-direction rotating block are separately connected with the plane of the check blockof the upper support plate in a sliding way, the inner side faces of the bridge forward-direction rotating block and the bridge cross-direction rotating block are separately and rotatably connected with the spherical surface of the outer edge of the upper end of the lower support plate, the bottom surfaces of the bridge forward-direction rotating block and the bridge cross-direction rotating blockare separately and rotatably connected with the spherical surface of a horizontal rotary check block fixedly connected with the bottom of the check block of the upper support plate, and adjustable gaps are reserved between the rabbet inner wall of the check block of the upper support plate and the top surfaces of the bridge forward-direction rotating block and the bridge cross-direction rotatingblock, so that multi-directional coordinated rotation of the support is realized. The multi-directional coordinated rotating fixed bridge support is simple in structure, low in manufacturing cost, andconvenient and fast to install; by means of multi-azimuth spherical rotational connection, all the components are in a surface contact stress state during work of the support, so that the service life of the support is significantly prolonged; therefore, the support has good economical practicability and popularization prospect.

Description

technical field [0001] The invention relates to a multi-directional coordinated rotating fixed bridge bearing, which belongs to the field of bridge bearings for bridge construction. Background technique [0002] The bridge support is an important component connecting the upper structure and the lower structure of the bridge. It can reliably transmit the reaction force and deformation of the upper structure of the bridge to the lower structure, and at the same time coordinate the temperature load of the upper and lower structures of the bridge through its own structural characteristics. , concrete shrinkage and creep deformation under factors such as. At present, the commonly used bridge bearings are divided into fixed type, unidirectional type and multi-directional type. In addition to transmitting horizontal and vertical forces, the fixed support should also allow the upper structure to rotate freely at the support. In terms of load, the horizontal force of conventional f...

AI Technical Summary

Problems solved by technology

In terms of load, the horizontal force of conventional fixed spherical bearings generally does not exceed 30% of the vertical force, but due to the special needs of structural design, the horizontal force may approach or even exceed the vertical force; in terms of displacement, When the conventional fixed spherical bearing rotates around the main direction, a corner will be generated between the stainless steel slide plate and the polytetrafluoroethylene plate arranged on the upper and lower bearing plates, and the friction pair will change from surface contact to linear contact. The contact will cause the PTFE plate to produce obvious stress concentration phenomenon, which will intensify the destruction speed of the friction pair. If the corner around the pair direction is generated at the same time, the stress state of the PTFE plate will be more complicated, and even jamming will occur. dead phenomenon, resulting in the overall destruction of the bearing

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