Prestressed segment assembled pier with SMA energy-consuming reinforcing steel bars at bottom and assembling method

Abstract

The invention belongs to the field of bridge engineering, and particularly relates to a prestressed segment assembled pier with SMA energy-consuming reinforcing steel bars at the bottom and an assembling method. The structure comprises a bearing platform, prestressed steel bars, reinforced concrete segments, SMA energy-consuming steel bars, steel base plates, rubber pads, steel bar connectors and anchoring devices, wherein a reinforced concrete bottom section is connected with a bearing platform in the pier, a layer of rubber pad with double functions of energy consumption and protection is placed between the bottom section and the bearing platform, and the upper side and the lower side of the rubber pad are each provided with a steel base plate. Longitudinal bars in the bottom section are connected with SMA energy dissipation steel bars through steel bar connectors, the SMA energy dissipation steel bars are located in a reserved PVC pipeline; then the PVC pipeline sequentially and downwards penetrates through a steel base plate, a rubber pad, the steel base plate and a hole channel reserved in a bearing platform from a plastic hinge area of the bottom section; and finally the tail ends of the SMA energy dissipation steel bars are anchored to an anchoring device in the bearing platform. The structure has the advantages of being high in energy dissipation capacity, high in self-resetting capacity, small in residual displacement, small in pier bottom concrete damage and the like, and is suitable for being popularized and used in medium and high intensity areas.

Description

technical field [0001] The invention belongs to the field of bridge engineering, and in particular relates to a prestressed segmental assembled bridge pier with SMA energy-dissipating steel bars at the bottom and an assembled method. Background technique [0002] Prefabricated segmental assembled piers have been widely used in the field of bridge engineering in recent years due to their fast construction speed, high construction quality, and low environmental impact. Compared with ordinary prefabricated segmental assembled piers, the pier body of prestressed segmental assembled bridge piers is connected with the cap and each segment of the pier body through dry joints or glued joints, relying on prestressing to connect the segments of the pier and The bridge piers are connected with the caps. The self-resetting ability of prestressed segmental assembled piers is good, and the residual displacement is small after low-magnitude earthquakes, so they can be repaired quickly, so...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of poor energy dissipation capacity of prestressed section assembled bridge piers under earthquake action, excessive opening of pier bottom joints, serious damage to bottom concrete section column foot concrete, etc., and to provide a bottom adopting SMA energy dissipation Prestressed segmental assembled bridge piers of steel bars, suitable for prestressed segmental assembled bridge piers that are prefabricated and assembled on site

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