Three-way adjustable anti-seismic system of bridge crossing fracture zone

Abstract

The invention provides a three-way adjustable anti-seismic system of a bridge crossing a fracture zone. The three-way adjustable anti-seismic system of the bridge crossing the fracture zone is formedby adopting a dredging type anti-seismic measure and a blocking type anti-seismic measure, and arranging anti-seismic structures in the vertical direction, the longitudinal direction and the transverse direction of the bridge on the basis of each anti-seismic measure. According to the three-way adjustable anti-seismic system of the bridge crossing the fracture zone, the three-dimensional anti-seismic structures are adopted, so that the acceleration and the inter layer displacement of an upper structure during an earthquake can be reduced to a great extent, the earthquake response of the upperstructure is greatly reduced, the effect caused by earthquake force is dispersed and reduced, and the functions of reducing casualties and rapidly recovering the passage of vehicles are achieved.

Description

technical field [0001] The present disclosure relates to the field of bridge construction, in particular to a three-way adjustable anti-seismic system for a bridge spanning a fault zone. Background technique [0002] At present, the codes of various countries require bridge structures to avoid crossing seismically active faults as much as possible, but the distribution of underground active faults is not completely clear; at the same time, the distribution of crustal faults is extremely wide; Facing situations across seismically active faults. [0003] The characteristics of near-fault ground motion are obviously different from those of far-field ground motion. Near-fault ground motion shows obvious directional effect and sliding effect, and the sliding effect is mainly manifested in the displacement time history with obvious residual displacement. If the bridge crosses the fault, due to the sliding effect, there will be an obvious difference in displacement input at the po...

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Problems solved by technology

[0004] Usually, structural measures to prevent beam fall damage are mainly limited to seismic measures in a certain direction. For example, the detachable steel backing stone can only adapt to the permanent vertical displacement of bridges spanning faults after earthquakes through their own height adjustment; The steel bracket anti-fall beam device can only adapt to the permanent longitudinal displacement of bridges spanning faults after earthquakes by enlarging the minimum bearing surface width, and the anti-seismic measures are single

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