Gradient pier column with anti-seismic performance and its construction method

Abstract

The invention relates to the technical field of concrete pier columns, and discloses a gradient pier column with anti-seismic performance and a construction method thereof. The anti-seismic performance gradient pier consists of a concrete pier, steel bars arranged in the pier and gradient bars arranged in gradients. Gradient bars are fiber bars or shape memory alloy bars. The gradient of seismic performance is formed in the pier column through the continuous or stepwise change of the cross-sectional area of ​​the gradient reinforcement. During construction, according to the seismic force state of the pier column, determine the size and realization method of the performance gradient of the pier column, so that the other sections of the performance gradient area of ​​the pier column performance gradient area before reaching the limit curvature are not greater than their limit curvature. The invention can achieve the plastic state in the performance gradient area of ​​the pier column under the earthquake action, and the plastic deformation area of ​​the pier column constructed by the invention is greatly increased, so that the deformation performance and energy consumption capacity are greatly improved, and the earthquake peak acceleration that can be resisted is greatly increased improve.

Description

technical field [0001] The invention relates to the technical field of concrete piers, in particular to a gradient pier with anti-seismic performance and a construction method thereof. Background technique [0002] Earthquake is a kind of natural disaster with great destructive power. Strong earthquakes occur frequently all over the world, which poses a serious threat to the safety of people's lives and properties. The concrete piers in the bridge structure and the concrete columns in the building structure are the key components to bear the lateral load of the earthquake, which are prone to earthquake damage and damage, resulting in the loss of personnel and property. It is urgent to greatly improve the seismic performance level of the pier column. [0003] In order to resist the earthquake, the concrete piers (including bridge piers, structural columns, etc.) generally adopt ductile anti-seismic design. Under the earthquake, the piers will undergo obvious plastic deformati...

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Problems solved by technology

[0004] In order to solve the above technical problems, the present invention provides a gradient pier with seismic performance and its construction method to solve the technical problem of low seismic grade of concrete pier in the prior art

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