External energy-consumption self-resetting bridge pier stud structure system and realization method thereof

Abstract

The invention discloses an external energy-consumption self-resetting bridge pier stud structure system and a realization method thereof, belonging to the field of bridgework. The structure system mainly comprises a bridge pier stud, a bridge abutment, an unbonded prestressed reinforcement, an external energy consumption device, a pier embedded part and a bridge abutment embedded part, wherein the bridge pier stud and the bridge abutment are connected by the unbonded prestressed reinforcement and the external energy consumption device, so that residual deformation can be effectively reduced, and energy consumption can be guaranteed. The external energy-consumption self-resetting bridge pier stud structure system is flexible in design and has specific structure stress. The unbonded prestressed reinforcement on the axis position of the pier stud can be used for generating self-resetting restoring force. The problem that the traditional bridge pier has larger residual deformation and cannot continuously serve after the earthquake loading action is solved. The bridge pier has enough strength and rigidity. The external energy-consumption self-resetting bridge pier stud structure system is realized in a cast-in-situ or prefabricating mode and is easy to construct and is a novel pier stud structure system which is advanced and practical and can realize quick replacement and repair after the earthquake..

Description

technical field [0001] The invention belongs to the field of bridge engineering. In particular, it relates to an external energy-dissipating self-resetting bridge pier column structure system and its realization method, which use external energy-dissipating components for anti-seismic energy consumption and elastic reset components for residual deformation control. Background technique [0002] The recent frequent strong earthquakes have caused major property losses to our country and seriously threatened the lives of the people. As a key link in the lifeline of transportation hubs, bridges are responsible for transporting rescue materials and saving lives in earthquake relief. Research The new seismic system of the bridge is of great significance. However, under the action of strong earthquakes such as the Wenchuan Earthquake and the Yushu Earthquake, many existing bridges collapsed due to insufficient seismic capacity due to the limitations of the earthquake-resistant str...

AI Technical Summary

Problems solved by technology

For example, in the Hyogo-ken Nanbu (earthquake in southern Hyogo Prefecture, Japan) earthquake, about 250 reinforced concrete pier columns and 20 steel pier columns collapsed in the strong earthquake; more than 100 pier columns were tilted by more than 1° or their tops were offset More than 1.75%, affected the performance requirements for continued service and were dismantled, causing huge economic losses; similar situations also appeared in earthquake-stricken areas such as Wenchuan in my country

In the past ductility-based design of concrete piers or steel piers, the preset ductile deformation mechanism of the section is mainly realized by the yielding of the structural material of the pier column, such as steel or concrete, to form a plastic hinge in the section. It will happen, resulting in non-negligible residual deformation, which brings four problems: 1. The ductile deformation of the section is too large and it is difficult to recover locally, resulting in the overall demolition; 2. Even if the ductile deformation is within the limit, the bearing capacity of the design section and The stiffness has decreased significantly, which will adversely affect the continued service; 3. The removal and reconstruction of bridge piers on the traffic lifeline will hinder the restoration of traffic; 4. Directly cause huge economic losses

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