Multi-damping system for segment-assembled swing pier

Abstract

The invention discloses a multi-damping system for a segment-assembled swing pier. The multi-damping system comprises an upper structure, inhaul cable damping supports, cover beams, the segment assembly bridge piers, angle steel dampers, unbonded prestressed cables, a bearing platform and groove shear keys. The upper structure is supported on the cover beam through the inhaul cable damping support; the interiors of the bridge pier sections are connected through groove shear keys, the exteriors of the bridge pier sections are connected through connecting cover plates, and the section assembled bridge piers, the cover beam and the bearing platform are connected into a whole through unbonded prestressed cables; the tops of the piers are connected with the bent cap through angle steel dampers, and the bottoms of the piers are connected with the bearing platform through angle steel dampers. A shock absorption and isolation system and a swing system are combined and applied to the segment assembly bridge pier, the multiple shock absorption construction mode of the swing bridge pier is provided, the multi-damping system is suitable for main beam forms such as an assembly type T beam, a small box beam and an overall box beam, the working performance in the normal use state can be guaranteed, and the earthquake internal force response of the bridge pier is effectively reduced. And a self-resetting function is realized.

Description

technical field [0001] The invention belongs to the field of bridge engineering and anti-seismic, and in particular relates to a multi-vibration damping system of a swaying pier, which can jointly provide damping capacity through a cable damping support and a swaying pier under earthquake action. Background technique [0002] Segmentally assembled piers are a new research hotspot in rapid bridge construction. The existing segmental assembly piers have poor integrity and weak seismic performance of components, and cannot be used alone in medium-high intensity areas. Therefore, it is necessary to improve the seismic capacity of segmental assembly piers from the perspective of the seismic system. [0003] For several existing bridge construction systems: [0004] a) The ductile system is based on the premise that the pier yields to form a plastic hinge, but the integrity of the segmentally assembled pier is weak, which makes it difficult to meet the ductility requirements. Mor...

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Problems solved by technology

[0009] In order to solve the problems of weak seismic capacity of segmental assembled bridge piers and insufficient capacity of a single damping system described in the background technology, the present invention proposes a multiple damping system of segmental assembled swinging bridge piers, which can gradually reduce the level of bridges under earthquakes Rigidity, prolonging the structural period, isolating earthquake energy, and avoiding problems such as beam body collision and falling beams caused by excessive displacement of pier beams and pier tops. At the same time, external angle steels are added to ensure the rigidity requirements during normal use, Dissipate energy under the action of earthquakes, further reduce the dynamic response of the bridge, concentrate the damage on the support and angle steel and other devices, and can quickly repair and replace after the earthquake to achieve seismic toughness

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