Micro-prestress self-resetting wall provided with self-resetting variable friction dampers and construction method thereof

Abstract

The invention discloses a micro-prestress self-resetting wall provided with self-resetting variable friction dampers and a construction method thereof. The micro-prestress self-resetting wall comprises a foundation beam, a plurality of horizontal wall bodies arranged on the foundation beam and prestressed tendons penetrating through the horizontal wall bodies and the foundation beam and connectingthe horizontal wall bodies with the foundation beam, and variable friction dampers are arranged among the plurality of horizontal wall bodies and between the horizontal wall bodies and the foundationbeam for connection and fixation. The construction method comprises the steps that during construction, prestressed tendon channels are reserved on the foundation beam, middle friction plates are arranged on the foundation beam, inner friction plates or middle friction plates are arranged on the corresponding plurality of horizontal wall bodies, the plurality of horizontal wall bodies are connected and fixed, the horizontal wall bodies and the foundation beam are connected and fixed, and micro-tensioning is performed after the prestressed tendons are arranged. According to the self-resettingwall, under the action of an earthquake, the variable friction dampers arranged among the wall bodies and between the wall bodies and the foundation beam can consume a large amount of earthquake motion input energy through friction, self-resetting of the variable friction dampers can be achieved, and self-resetting force can be further provided to eliminate residual deformation of the wall bodiesin combination with arrangement of the prestressed tendons.

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...

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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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