Non-prestress self-resetting energy dissipation supporting device provided with variable friction damper

Abstract

The invention discloses a non-prestress self-resetting energy dissipation supporting device provided with a variable friction damper. The non-prestress self-resetting energy dissipation supporting device comprises the variable friction damper, an inner sleeve pipe, a plurality of pre-pull rods arranged in the inner sleeve pipe and an outer sleeve pipe arranged outside the inner sleeve pipe, wherein the variable friction damper comprises an upper friction plate, a middle friction plate and a lower friction plate which are sequentially connected, the contact surface of the upper friction plate and the middle friction plate is an embedded zigzag undulating slope surface, the middle friction plate is connected with the inner sleeve pipe, and the lower friction plate is connected with the outersleeve pipe. The energy dissipation device can dissipate energy under the earthquake action, reduce the interlayer displacement angle and acceleration of a building structure, eliminate or reduce residual deformation and damage of a reinforced concrete frame structure under the earthquake action, effectively avoid obvious plastic deformation of a main body structural member, and meanwhile, due tothe fact that the energy dissipation device is convenient to disassemble and assemble, friction energy consumption devices playing a role in dissipating energy are all in an elastic stage, and the repair cost and difficulty of the structure after an earthquake can be obviously reduced.

Description

technical field [0001] The invention belongs to the field of civil engineering energy consumption devices, in particular to a non-prestressed self-resetting energy consumption support device provided with a variable friction damper. Background technique [0002] Earthquakes have brought extremely serious disasters to human beings. The traditional seismic design adopts the ductility design method, that is, under the action of earthquakes, some structural components will yield and fail in advance, but the overall function will not be lost, relying on the plastic deformation of components after yielding. Dissipate most of the seismic energy, so as to achieve the purpose of ensuring the safety of the main structure. Although this traditional design method based on bearing capacity has certain reliability in avoiding building damage and even collapse causing casualties, it cannot effectively control the economic losses caused by earthquakes in moderate or strong earthquakes. , a...

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Problems solved by technology

At present, the energy-dissipating braces used in frame structures are mainly buckling-constrained self-resetting energy-dissipating braces. Although this type of structure can reduce the displacement angle and residual displacement angle of the structure, due to its large cross-sectional size, the energy dissipation after the earthquake Energy-supporting maintenance is more complicated. At the same time, due to the small starting force and stiffness of this type of energy-dissipating support, the dissipation of seismic energy is limited under large earthquakes and earthquakes, and it is easy to cause high-order modal effects in the structure, so its use effect is seriously affected.

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