Seismic performance gradient pier stud and construction method thereof

Abstract

The invention relates to the technical field of concrete pier studs and discloses a seismic performance gradient pier stud and a construction method thereof. The seismic performance gradient pier studcomprises a concrete pier stud, a steel reinforcement and a gradient reinforcement, wherein the steel reinforcement is configured in the pier stud, and the gradient reinforcement is configured in a gradient manner. The gradient reinforcement is a fiber reinforcement or a shape memory alloy reinforcement. Through continuous or gradient change of the section area of the gradient reinforcement, theseismic performance gradient is formed in the pier stud. During construction, the size and implementation mode of the seismic performance gradient are determined according to an earthquake stress state of the pier stud so that the curvatures of other sections of a seismic performance gradient area are not larger than the ultimate curvature before the top section of a seismic performance gradient area reaches ultimate curvature. According to the seismic performance gradient pier stud, the performance gradient areas of the pier stud can simultaneously reach a plastic state under the action of anearthquake; and a plastic deformation area of the pier stud constructed by using the construction method is greatly enlarged so that the deformation performance, energy consumption capacity and the like can be greatly improved; and therefore, the earthquake peak accelerated speed which can be resisted is greatly increased.

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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