Self-resetting double-column pier system with replaceable shear energy consumption device

Abstract

The invention discloses a self-resetting double-column pier system with a replaceable shear energy dissipation device, and belongs to the technical field of bridge engineering, the self-resetting double-column pier system comprises an upper structure, a lower structure and a bearing platform, the lower structure is used for supporting the upper structure, and the lower structure comprises a left supporting system and a right supporting system which are symmetrically arranged; the left supporting system comprises a cover beam and a pier fixedly supported at the bottom of the cover beam, a shear energy consumption device is connected between the cover beam of the left supporting system and the cover beam of the right supporting system, and the pier is connected with the bearing platform in a swinging mode. The shear energy dissipation device dissipates energy when relative displacement occurs between the cover beams of the left supporting system and the right supporting system. By the adoption of the bridge system, the energy dissipation efficiency of the energy dissipation device can be fully exerted, and the energy dissipation capacity, the reset force and the anti-overturning capacity of the pier can be improved.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering, and in particular relates to a self-resetting double-column pier system with a replaceable shear energy-consuming device. Background technique [0002] The traditional double-column pier is designed according to the ductility and anti-seismic design. Although it can ensure that the pier will not collapse under the earthquake, the earthquake will cause serious damage to the plastic hinge area of ​​the pier, and at the same time produce a large residual displacement, which is not conducive to the rapid recovery after the earthquake. [0003] The self-resetting double-column pier connected by post-tensioned tendons relaxes the constraint between the pier bottom and the cap, allowing the pier to sway under the action of an earthquake and improving its self-resetting ability. In order to improve its energy consumption capacity, it is necessary to set up an external energy consumption device...

AI Technical Summary

Problems solved by technology

However, the existing external energy dissipation devices are generally arranged near the rocking interface between the pier bottom and pier top. When the horizontal displacement of the pier is small, the deformation of the energy dissipation device is small and the energy dissipation capacity is weak. The deformation of the energy consumption device increases slowly, and the energy consumption capacity of the energy consumption device cannot be fully utilized

In addition, the traditional swaying bridge pier has a greater risk of overturning due to the small overturning displacement after swaying. Although the use of prestressed tendons provides additional reset force for the pier, it is difficult to inspect and replace the prestressed tendons

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