Cable type friction damper with variable friction coefficient

Abstract

The invention discloses a cable type friction damper with a variable friction coefficient. The cable type friction damper with the variable friction coefficient comprises a friction damper body, the friction damper body is obliquely connected with the upper left end and the lower right corner of a building, the friction damper body comprises a damper base plate, a damper upper cover and a metal block capable of moving between the damper base plate and the damper upper cover, one end of the metal block is connected to the upper left end of the building through a steel cable, the other end of the metal block is connected with the lower right corner of the building through a reset spring, the damper upper cover is hinged to the right building through a pull rod, and a damper bottom plate is fixed to the ground through a support. By means of the friction damper, the increasing effect of the friction damper on the lateral rigidity of a building structure can be reduced to the maximum extent, input of earthquake energy is reduced, meanwhile, the steel cables can be used for crossing floors as many as possible, energy consumption is achieved through the larger interlayer displacement difference, and the equipment installation cost and the damper installation number can be effectively reduced.

Description

technical field [0001] The invention relates to a friction damper, in particular to a cable type friction damper with variable friction coefficient during forward and reverse motion. Background technique [0002] According to the "Code for Seismic Design of Buildings" GB50011-2010 (2016 Edition), many areas, including some famous large and medium-sized cities, belong to high-intensity earthquake areas, such as Kunming, Beijing, Tangshan, etc. For high-intensity areas, relying solely on the stiffness of the structure itself to resist moderate and large earthquakes is not only not economical, but also technically difficult to achieve. Therefore, it is necessary to carry out shock-absorbing design for buildings in these areas. [0003] The Yunnan Provincial Government's "Provisions on the Promotion of Earthquake Isolation and Damping Construction Projects in Yunnan Province" stipulates that the following new construction projects should adopt earthquake isolation and damping te...

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Problems solved by technology

[0004] At present, the dampers used for shock absorption in multi-story buildings are mostly friction dampers, metal dampers and viscous dampers, among which friction dampers are generally connected and installed by rigid metal rods, usually installed on a certain floor of the building Or between certain layers, a cross-type oblique arrangement is generally adopted, and the friction and shock absorption is achieved by using the interlayer displacement between a certain layer or certain layers. However, this connection method has the following problems: First, the use of rigid The connection of metal rods will significantly increase the lateral stiffness of the structure, thereby increasing the input of seismic energy; 2. Rigid metal rods are tension and compression rods under earthquake action. Due to the limitation of slenderness ratio and section size, It is difficult to use the inter-story displacement between multiple floors, resulting in a limited energy dissipation capacity of a single friction damper. In actual engineering, the number of friction dampers has to be increased, resulting in an increase in engineering costs

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