Concrete-filled steel pipe column internally provided with high-strength angle steel and construction method thereof

Abstract

The invention discloses a concrete-filled steel pipe column internally provided with high-strength angle steel and a construction method thereof. The concrete-filled steel pipe column comprises a steel pipe, the high-strength angle steel, concrete, connecting pieces and studs. The cross section of the steel pipe is a polygon, and the number of sides of the polygon and the number of the high-strength angle steel are the same. The high-strength angle steel is evenly arranged inside the steel pipe in an axially penetrating mode, the high-strength angle steel and the inner wall of the steel pipe are separated by a certain distance, the vertex angles of the high-strength angle steel point to the middles of the corresponding sides of the polygon, and openings of the high-strength angle steel allface the center of the concrete. The studs are fixed to the outer surfaces of the high-strength angle steel at intervals. The connecting pieces are metal batten plates or fiber reinforced polymer cloths, are arranged on the outer surfaces of the adjacent high-strength angle steel, and evenly arranged at equal intervals in the height direction. The high strength advantage of the high-strength angle steel can be given full play, thus the size of the column section can be significantly decreased under the same bearing capacity requirement, the building usable area is significantly increased, thestructure self-weight is further reduced, the earthquake resistance of the structure is facilitated, and meanwhile fire resistance is also improved.

Description

technical field [0001] The invention relates to a concrete column, in particular to a steel tube concrete column with built-in high-strength angle steel and a construction method thereof. Background technique [0002] Compared with reinforced concrete columns, CFST columns have the advantages of high bearing capacity, good ductility, and no need for formwork, so they are widely used in building structures at home and abroad. However, in order to further increase the bearing capacity of members and increase its application range, it is often necessary to enlarge the section size of CFST columns. This method not only increases the occupied area of ​​the building space and affects the appearance of the building structure, but also increases the self-weight of the building structure, which is not conducive to the earthquake resistance of the building structure. [0003] Compared with general-strength steel, high-strength steel has the advantage of high yield strength, so it is ...

AI Technical Summary

Problems solved by technology

However, the ratio of yield strength to ultimate strength of high-strength steel is close to 1, and there are great safety concerns in directly applying it to steel structures and steel-concrete composite structures; at the same time, local buckling of high-strength steel often occurs before compressive yielding , leading to the high yield strength of high-strength steel cannot be fully utilized

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