Self-resetting repairable high-performance prefabricated RC column

Abstract

The invention discloses a self-resetting repairable high-performance prefabricated RC column. The self-resetting repairable high-performance prefabricated RC column comprises a replacement area, a transition area is arranged above the replacement area, a common concrete area is arranged above the transition area, the transition area and the replacement area are both formed by pouring ultra-high performance concrete (UHPC), and the common concrete area is formed by pouring common concrete; steel strands penetrating through the whole prefabricated RC column from top to bottom are arranged at the four corners of the prefabricated RC column in the longitudinal direction; the middle part is the prestressed steel strands penetrating through the whole prefabricated RC column from top to bottom; and common steel bars penetrating through the whole prefabricated RC column from top to bottom are arranged in the middle of the four faces of the prefabricated RC column in the longitudinal direction, the common steel bars in the replacement area are replaced by energy-consuming steel bars, the common steel bars and the energy-consuming steel bars are connected through threaded sleeves, and UHPC materials are poured on peripheries of the steel bars for wrapping. The RC column has low residual displacement and good self-resetting capacity under the action of low frequency cyclic loading, the energy-consuming steel bars in the replacement area can be replaced after being damaged, and the RC column can be conveniently repaired after an earthquake.

Description

technical field [0001] The invention belongs to the technical field of recoverable earthquake damage, in particular to a self-resetting and repairable high-performance prefabricated RC column. Background technique [0002] The current anti-seismic code requires that the structure must meet the "three levels" of anti-seismic fortification objectives, that is, the structure must meet the anti-seismic requirements of "not damaged by small earthquakes, repairable by moderate earthquakes, and not collapsed by large earthquakes". According to the "two-stage design" method, that is, through the calculation of bearing capacity and elastic-plastic deformation, it can be guaranteed to a certain extent that the main structure of the building is generally not damaged or does not require Repairs can continue to be used; under the influence of earthquake motions equivalent to the basic intensity of the region, the building may be damaged, but it can still be used normally after general re...

AI Technical Summary

Problems solved by technology

However, the innovative design and theoretical research of the recoverable functional structure is not perfect at this stage, which requires a practical and reliable design of the recoverable functional structure, so that this kind of structure can be more widely used in practical projects.

Images