Restorable railway bridge ductile structure pier

Abstract

The invention discloses a restorable railway bridge ductile structure pier. The restorable railway bridge ductile structure pier includes a concrete pier body, the pier body comprises an outer ring reinforcement cage and an inner ring reinforcement cage. The outer ring reinforcement cage comprises first longitudinal bars and first stirrups, the first longitudinal bars are arranged along the full length of the pier body, a gap is formed between the bottom surface of the outer ring reinforcement cage and the top surface of a bearing platform, a mortar cushion layer is arranged in the gap, the inner ring reinforcement cage comprises second longitudinal bars and second stirrups, and the bottom of the inner ring reinforcement cage extends into the bearing platform. By adopting the structure, under the effects of normal operation and small earthquake of a railway bridge, the pier can meet the rigidity requirement of normal operation of a train, under the action of a large earthquake, a plastic hinge is formed at the pier bottom to dissipate earthquake energy, ductile earthquake-resistant design of the pier is achieved, ductile deformation capacity and earthquake energy dissipation capacity of a traditional railway pier are improved, the mortar cushion layer can be rapidly repaired after the earthquake, the pier is restored to the size and rigidity before the earthquake, driving safety after the earthquake is guaranteed, and precious time is won for rescue after the earthquake.

Description

technical field [0001] The invention relates to the technical field of bridge engineering, in particular to a recoverable ductile structural pier of a railway bridge. Background technique [0002] A lot of research has been done on the ductility performance, restoring force model, performance index and damage and destruction of reinforced concrete bridge piers at home and abroad, and a large number of research results have been obtained. However, these studies are mainly aimed at highway piers with relatively small stiffness of pier columns. For railway piers, in order to meet the needs of normal railway operation, the code stipulates that the stiffness of railway piers is relatively large, often dozens of times that of highway piers, and the cross-sectional size of the piers is also relatively large. They often maintain an elastic state under earthquake action, and it is difficult to enter ductility. As a result, the seismic force distributed during the earthquake is relat...

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Problems solved by technology

[0003] The object of the present invention is to provide a recoverable bridge pier in view of the above-mentioned deficiencies in the prior art, such as high rigidity, difficulty in entering the ductile state under earthquake action, poor ductile deformation capacity, difficulty in repairing once damaged, and long repair period. Ductility Structural Piers of Railway Bridges

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