Cast-in-site column with column cap and construction method

Abstract

The invention discloses a cast-in-site column with a column cap and a construction method. The cast-in-site column comprises a concrete column body and reinforcements embedded in the column body, and is characterized in that the column cap is arranged at a joint of the end of an external precast superposed beam on the column body; the width of the section of the column cap is larger than that of the section of the column body; and the end of the precast beam is supported by the column cap. By adoption of the technology, the section of a core section area of a beam column joint can be enlarged, so that the shear-bearing capacity of the joint is greatly improved, and the joint is not damaged prior to a member during an earthquake.

Description

technical field [0001] The invention relates to a building column, in particular to a cast-in-place reinforced concrete column with a column cap in a prefabricated cast-in-place structure. Background technique [0002] According to the seismic code of building structures, the principle of seismic design is "strong joints and weak components" to avoid joint failure before components. A large number of tests have shown that increasing the column section of beam-column joints is the most effective way to improve the shear strength of joints. In traditional beam-column joints, the columns generally have the same section as the column body, and the reinforcement at the beam-column joints is dense, the stirrups are difficult to bind, and the concrete pouring and tamping is difficult, and in the cast-in-place reinforced concrete structure, the beams and columns are usually poured at the same time. , it is difficult to use high-grade concrete different from beams for columns and joi...

AI Technical Summary

Problems solved by technology

[0002] According to the seismic codes of building structures, the principle of seismic design is "strong joints, weak components" to avoid the failure of joints before components, and a large number of tests have shown that increasing the column section of beam-column joints is the most effective way to increase the shear strength of joints. However, the columns in traditional beam-column joints generally have the same cross-section as the column body, and the steel bars at the beam-column joints are dense, the hoops are difficult to bind, and the concrete is difficult to pour. , It is difficult to use high-grade concrete different from beams for columns and joints, resulting in large column cross-sections or low safety factors. A high-strength column with a column cap for prefabricated composite beams has not been reported.

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