Steel tube concrete superposed column with mild steel casing outer packed concrete at bottom and preparation method thereof

Abstract

The invention relates to a steel tube concrete superposed column with a mild steel casing outer packed concrete at bottom and a preparation method thereof, which comprises an internal steel tube (1), a steel tube internal concrete (2), a steel tube external concrete (4), a longitudinal reinforcement (5), a reinforcement stirrup (6) and a steel tube casing (3).The invention is a multiple combinations confined steel tube concrete superposed column which combines the steel tube and the concrete, the internal steel tube concrete and the external reinforced concrete, the bottom mild steel casing and the internal steel tube; the bottom mild steel casing (3) is capable of increasing horizontal bearing capacity and vertical bearing capacity of the superposed column, ductibility and energy dissipation capacity. Because the damage to the superposed column generally occurs at the root of the superposed column, therefore strengthening root can reduce the sectional area and increase the utilization area, so that the amount of the concrete is decreased, the self-weight of the structure is mitigated, the energy consumption of building is reduced. Under the condition of same steel consumption, the invention provides more economic benefit.

Description

technical field [0001] The invention relates to a novel steel pipe concrete composite column, in particular to a steel pipe concrete composite column with a soft steel casing at the bottom and a concrete outsourcing method, and a method thereof. Background technique [0002] With the development of production technology and the improvement of people's living standards, people's requirements for various types of buildings are also increasing, and they have certain requirements for the safety and comfort of structures. Reinforced concrete columns and concrete filled steel tubes are used more and more in various high-rise and super high-rise buildings, and each has its own advantages. Reinforced concrete columns give full play to the respective advantages of steel bars and concrete, and have good seismic performance and fire-proof and anti-corrosion properties; steel tube concrete columns overcome the shortcomings of steel tubes that are prone to local buckling, and at the same...

AI Technical Summary

Problems solved by technology

The cross-sectional size of reinforced concrete columns is large, occupying the use space, and the deformation capacity is limited; the fire performance of steel tube concrete columns is poor; the emergence of steel tube concrete composite columns solves this problem for us to a certain extent, but in super In high-rise structures, the cross-sectional size of ordinary concrete-filled steel tube composite columns is still very large, and the damage of the structure is mostly concentrated at the bottom of the composite steel tube concrete composite columns

Images