Self-resetting pier column structural system with built-in energy dissipation assembly and implementing method for self-resetting piper column structural system

Abstract

The invention discloses a self-resetting pier column structural system with a built-in energy dissipation assembly and an implementing method for the self-resetting pier column structural system, and belongs to the field of bridge engineering. The self-resetting pier column structural system consists of a pier column, a bridge abutment, energy dissipation steel bars, non-adhesion prestressed steel bars with an elastic resetting function and an embedded part; in the novel pier column structural system capable of effectively reducing residual deformation and ensuring sufficient energy dissipation, a pier is connected with the bridge abutment through the energy dissipation steel bars and the non-adhesion prestressed steel bars. Compared with the conventional pier column node, the self-resetting pier column structural system has the advantages that: the non-adhesion prestressed steel bars are positioned in the axle center of the pier column, a self-resetting restoring force can be generated, and the problem that the conventional pier has large residual deformation under the action of an earthquake load and cannot serve people any longer can be solved well; the self-resetting pier column structural system is flexible in design and definite in structural stress; the pier is ensured to have sufficient strength and rigidity; and the self-resetting pier column structural system can be implemented by a prefabricating or on-site pouring method, is easy and convenient to construct, and is an advanced and practical novel pier column system.

Description

technical field [0001] The invention belongs to the field of bridge engineering. In particular, it relates to a self-resetting bridge pier structure system and a realization method with built-in energy-dissipating components for anti-seismic energy dissipation 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 structural system. Put into use, but need to b...

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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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