Top-bottom variable friction energy dissipation self-resetting prestressed concrete beam-column joint device

Abstract

The invention discloses a top-bottom variable-friction energy dissipation self-resetting prestressed concrete beam-column joint device which comprises a precast concrete column, a precast concrete beam located on one side of the precast concrete column, and a variable-friction energy dissipation device connecting the precast concrete column with the precast concrete beam. The variable-friction energy dissipation device comprises a middle friction steel plate with a fluctuating face, an outer friction steel plate with a fluctuating face, and an inner friction steel plate connected to the precast concrete beam. The high-order mode effect of a structure can be lowered, the energy dissipation capacity of the structure under the earthquake effect is improved, residual deformation of the precastfabricated reinforced concrete structure under the earthquake effect is reduced or eliminated, and obvious plastic deformation is prevented from occurring to main body structural components such as the precast beam and column.

Description

technical field [0001] The invention belongs to the field of civil engineering, and relates to a self-resetting prestressed concrete beam-column node device with variable friction and energy consumption at the top and bottom. Background technique [0002] Earthquakes bring extremely serious disasters to human beings. The traditional seismic design adopts the ductility design method, that is, under the action of an earthquake, some structural components yield and fail in advance, but the overall function will not be lost, and most of the seismic energy is dissipated by the plastic deformation of the components after yielding, 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 damage caused by earthquakes in moderate or strong earthquakes. After most major...

AI Technical Summary

Problems solved by technology

Although the overall initial lateral stiffness of this type of structure is relatively large, there is only a single starting force. Once the energy dissipater yields or friction starts, the gap between the beam-column joints opens, and the lateral stiffness of the structure is mainly provided by the stiffness of the prestressed tendons. Significantly lower stiffness

Under the action of strong earthquakes, the large weakening of the interstory stiffness will easily lead to obvious high-order modal effects in the self-resetting precast concrete structure, and the structural deformation is easy to concentrate, the local floor displacement angle is large, the damage of non-structural components increases, and the seismicity of the structure increases. Posterior reset ability is also affected

Images