Square-sleeve-round steel tube ultra-high performance concrete column with T-shaped section stiffening ribs

Abstract

The invention discloses a square-sleeve-round steel tube ultra-high performance concrete column with T-shaped section stiffening ribs. The square-sleeve-round steel tube ultra-high performance concrete column is characterized by comprising an inner steel tube 1, an outer steel tube 2, the T-shaped stiffening ribs 3 and ultra-high performance concrete 4. The inner steel tube and the outer steel tube are square-sleeve-round thin-wall steel tubes and are concentrically arranged, the ultra-high performance concrete is added into an interlayer, and the T-shaped ribs are welded to the inner steel tube so as to be arranged in the concrete. Although the ultra-high performance concrete is high in strength, the brittleness is large, and the T-shaped ribs are arranged to assist the square outer steel tube in better restraining the concrete. The member improves the flexural capacity of the concrete filled steel tube column under the bias pressure condition, so that the ductility of the member is improved, and the member has the advantages of reasonable stress, clear force transmission, high construction speed and the like, and is more suitable for being used in practical engineering.

Description

technical field [0001] The invention relates to a concrete column, in particular to a steel tube concrete rib with a T-shaped section stiffening rib. Background technique [0002] Concrete-filled steel pipe column is a structural member that fills the inner cavity of the steel pipe with concrete. The steel pipe and its core concrete bear the external load together. The concrete has a strong compressive capacity. Anti-stress effect. Adding ultra-high-performance concrete to concrete-filled steel tube columns can greatly improve the axial compressive effect of the overall member, but due to the high brittleness of ultra-high-performance concrete and the constraints provided by thin-walled steel pipes or steel pipes with square cross-sections Insufficient, etc. will make the whole component prone to brittle failure under eccentric compression, or the phenomenon of low ductility. In order to solve this problem, it is proposed to add T-shaped cross-section stiffeners to the out...

AI Technical Summary

Problems solved by technology

Adding ultra-high-performance concrete to concrete-filled steel tube columns can greatly improve the axial compressive effect of the overall member, but due to the high brittleness of ultra-high-performance concrete, and the constraints provided by thin-walled steel pipes or steel pipes with square cross-sections Insufficient, etc. will make the whole component prone to brittle failure under eccentric compression, or the phenomenon of low ductility

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