Reinforced concrete double composite core column and construction method thereof

Abstract

The invention relates to a reinforced concrete double composite core column and a construction method thereof. Under the precise of guaranteeing the column ductility requirement, how to improve the axial pressure ratio limiting value of the column so as to effectively reduce the size of the cross section of the reinforced concrete column gradually becomes a prominent problem in the practice of reinforced concrete structural engineering. The reinforced concrete double composite core column comprises a concrete column. An outer core and an inner core which are coaxial with the concrete column are arranged in the concrete column. The outer core comprises an outer core stirrup and outer core longitudinal bars alternately fixed inside and outside the outer core stirrup. The inner core comprises an inner core stirrup and inner core longitudinal bars on the inner side of the inner core stirrup. A periphery stirrup of the concrete column is arranged on an outer ring of the outer core, and periphery longitudinal bars are arranged on the inner side of the periphery stirrup. The anti-seismic performance and the axial pressure ratio limiting value of the reinforced concrete column can be effectively improved, and the construction method is simple and easy to popularize.

Description

technical field [0001] The invention relates to a reinforced concrete column structure, in particular to a reinforced concrete double composite core column and a construction method thereof. Background technique [0002] In the reinforced concrete column structure, the axial compression ratio is the main factor of its seismic performance, and the limit value of the axial compression ratio is strictly limited in the code. In order to meet the requirements of the column axial compression ratio limit during structural design, enlarged columns However, increasing the size of the column section will lead to a significant reduction in the use of the building space and affect the indoor view; at the same time, due to the increase in the size of the column section, it is easy to form a short column, which will cause brittle shear failure under the action of the earthquake. Therefore, under the premise of ensuring the ductility of the column, how to increase the limit value of the ax...

AI Technical Summary

Problems solved by technology

However, although these measures can improve the seismic performance of reinforced concrete columns and the limit value of axial compression ratio, there are certain limitations in actual operation due to the difficulty of construction and high cost.

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