Micro-prestressed self-resetting wall with self-resetting variable friction damper and its construction method

Abstract

The invention discloses a micro-prestressed self-resetting wall provided with a self-resetting variable friction damper and a construction method thereof. And the prestressed tendons connected with the two, variable friction dampers are set between the horizontal walls and between the horizontal walls and the foundation beams to connect and fix; reserve the prestressed tendon passages on the foundation beams during construction and set For the middle friction plate, set internal friction plates or middle friction plates on corresponding several horizontal walls, connect and fix between several horizontal walls and between the horizontal walls and the foundation beam, set prestressed tendons and then slightly tension. Under the earthquake action of the self-resetting wall, the variable friction damper installed between the walls and between the wall and the foundation beam can not only consume a large amount of ground vibration input energy through friction, but also realize the self-resetting of the variable friction damper. The setting of stress tendons can further provide self-resetting force to eliminate residual deformation of the wall.

Description

technical field [0001] The invention belongs to the field of civil engineering, and in particular relates to a micro-prestressed self-resetting wall provided with a self-resetting variable friction damper and a construction method thereof. Background technique [0002] Earthquakes have brought huge economic losses and casualties to human beings. The traditional seismic design adopts the ductility design method, that is, under the action of an earthquake, some parts of the structure are allowed to yield and fail, and the expected structural damage form is produced, so as to ensure that the overall structure will not lose its function, and through the components after yielding Plastic deformation is used to dissipate most of the seismic energy, so as to achieve the purpose of ensuring the safety of the main structure. Although the traditional design method has certain reliability in avoiding building collapse and casualties, and can meet the seismic fortification goal of "not...

AI Technical Summary

Problems solved by technology

[0004] However, the existing self-resetting prefabricated walls need to apply high prestress in order to improve the rigidity, self-resetting ability and shear bearing capacity.

Excessive prestress will lead to a decrease in structural ductility, and it will not be beneficial to earthquake resistance. As the initial prestress is increased, the loss of prestress is inevitable. At the same time, it is difficult to meet the local pressure requirements of concrete.

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