Ductile concrete column capable of delaying local buckling of steel bars and manufacturing method thereof

Abstract

The invention discloses a ductile concrete column capable of delaying local buckling of steel bars and a manufacturing method thereof. The ductile concrete column comprises a reinforced concrete column, wherein the reinforced concrete column comprises transverse stress stirrups which are transversely arranged, longitudinal stress steel bars which are arranged in the vertical direction and a concrete layer; circular corrugated pipes are respectively buried in the concrete layer which is in the vicinity of the two ends of the reinforced concrete column, the number of the circular corrugated pipes at each end of the reinforced concrete column corresponds to that of the longitudinal steel bars, each circular corrugated pipe is simultaneously sheathed on the periphery of the longitudinal stress steel bars, and a high-strength grouting material of the concrete layer is filled between the circular corrugated pipes and the longitudinal stress steel bars, wherein the strength of the high-strength grouting material is not lower than that of the reinforced concrete column. The ductile concrete column disclosed by the invention can enable concrete on the periphery of the steel bars to be less prone to appearance of obvious cracks and shedding damages by wrapping the constrained cylindrical concrete through the circular corrugated pipes, simultaneously effectively delay the occurrence of the local buckling of the steel bars, effectively improve the bearing and deformation capacity of a framework column and be further conductive to post-earthquake reinforcement and repair.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, in particular to a ductile concrete column for delaying or preventing local buckling of steel bars and a manufacturing method thereof. Background technique [0002] According to the damage investigation results of the 5.12 earthquake in my country in 2008 and many earthquakes around the world, the ends of the bottom frame columns in multi-high-rise buildings are prone to serious damage. The failure characteristics are mainly manifested in the local buckling of the longitudinally stressed steel bars in the shape of a lantern, and the concrete in the compression zone is loose and falls off. Once this type of failure occurs at the end of the column, the strength of the longitudinally stressed steel bars will not be fully utilized, and at the same time, the local structure corresponding to the column will undergo vertical uneven deformation, resulting in aggravated damage to the main struct...

AI Technical Summary

Problems solved by technology

Once this type of failure occurs at the end of the column, the strength of the longitudinally stressed steel bars will not be fully utilized, and at the same time, the local structure corresponding to the column will undergo vertical uneven deformation, resulting in aggravated damage to the main structure of the building. Make it more difficult to strengthen and repair damaged buildings

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