High-ductility FRP-friction type self-resetting energy consumption device

Abstract

The invention discloses a high-ductility FRP-friction type self-resetting energy consumption device. Two conical inner cores are located in a circular outer sleeve and are tightly attached to the circular outer sleeve, and the left end of the first conical inner core and the right end of the second conical inner core extend out of the outer sleeve and are connected with a left end plate and a right end plate correspondingly; a self-resetting system is mainly composed of high-ductility FRP strips or a whole package of FRP and the circular outer sleeve, when the strip FRP form is adopted, the FRP strips are uniformly distributed in the axis direction of the circular outer sleeve and are tightly connected with the periphery of the circular outer sleeve; and when the whole package of FRP form is adopted, the FRP completely wraps the circular outer sleeve and is tightly attached to the circular outer sleeve. The support has the advantages of good practicability, energy consumption capability, self-resetting capability and the like.

Description

technical field [0001] The invention belongs to the technical field of structural engineering energy dissipation and shock absorption, in particular, it relates to a high ductility FRP-friction type self-resetting energy dissipation device Background technique [0002] The existence of residual deformation of the bridge structure after the earthquake will seriously reduce the ability of the structure itself to resist aftershocks, and increase the cost of reinforcement and maintenance of the bridge structure after the earthquake, and even need to be demolished and rebuilt, resulting in huge economic losses. In order to reduce the residual displacement of structures after earthquakes, scholars have proposed different types of self-resetting energy-dissipating supports. The system consumes the input energy of the earthquake through the energy dissipation device to protect the safety of the main structure, and at the same time provides the self-restoring force through the additi...

AI Technical Summary

Problems solved by technology

However, SMA is expensive. After the strain exceeds 8%, there will be stress strengthening, plastic displacement reduction and stiffness reduction. It is easily affected by temperature, and the energy dissipation capacity of SMA decreases with the increase of loading frequency.

However, there are many spring components and the installation is complicated

However, the self-resetting support mostly uses a single set of pre-compressed disc springs to provide the restoring force, which cannot fully utilize the axial deformation capacity of the disc springs, and the process of pre-compressing the disc springs requires the use of large-scale loading equipment, which has high requirements for the installation environment.

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