Earthquake isolation and reduction structure and earthquake reduction method thereof

Abstract

The invention provides an earthquake isolation and reduction structure and an earthquake reduction method thereof, belongs to the technical field of bridge engineering and aims to solve the problem that the conventional earthquake isolation and reduction method is unsatisfactory in earthquake reduction effect or high in manufacturing cost. The structure comprises a plurality of spherical support seats and rubber support seats which are arranged between an upper structure and a lower structure of a bridge at intervals, wherein each rubber support seat comprises an upper cushion block, a rubber support seat body and a lower cushion block which are successively arranged from top to bottom; an upper support seat steel plate and a lower support seat steel plate are arranged at the top end and the bottom end of each rubber support seat body respectively; upper cushion block steel plates and lower cushion block steel plates are arranged between the upper and lower support seat steel plates and the corresponding upper and lower cushion blocks respectively; the upper and lower cushion block steel plates are embedded in the upper and lower cushion blocks. The earthquake reduction method comprises the following steps: firstly fixedly connecting the spherical support seats and the rubber support seats between the upper structure and the lower structure of the bridge, arranging the spherical support seats and the rubber support seats at intervals in parallel; then shearing off the spherical support seats when the earthquake occurs, enabling the rubber support seats to bear the horizontal force so as to control the horizontal displacement of a bridge body.

Description

technical field [0001] The invention relates to the technical field of bridge engineering, in particular to a shock absorbing and isolating structure and a shock absorbing method thereof. Background technique [0002] Continuous girder bridge refers to a continuous girder bridge with two or more spans, which belongs to the statically indeterminate system. Under the action of constant live load, the negative bending moment of the fulcrum generated by the continuous beam has an unloading effect on the positive bending moment of the mid-span, so that the internal force state is relatively uniform and reasonable, so the beam height can be reduced, thereby increasing the clearance under the bridge, saving materials, and improving rigidity. Large, good integrity, high overload capacity, high safety, less expansion joints on the bridge deck, and because the bending moment of the mid-span section is reduced, the bridge span can be increased. However, due to the weight of the supers...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problem of unsatisfactory shock-absorbing effect or high cost in the current shock-absorbing and isolation methods of long-span low-pier continuous girder bridges, the present invention provides a simple-structured, cost-saving shock-absorbing and isolating structure and a shock-absorbing method to reduce bridge Seismic force of the upper structure on the lower structure, and control the horizontal displacement of the beam

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