Steel rib-steel tube recycled concrete combined column

Abstract

The invention relates to a concrete component, and in particular relates to a steel rib-steel tube recycled concrete combined column in civil engineering. The combined column consists of steel ribs, steel tubes and recycled concrete, and is formed by soldering steel plates, wherein the steel tube is positioned in the center of the column, the steel ribs are positioned at the corners of the column, and the concrete contains recycled concrete fragments serving as aggregates; the recycled concrete comprises recycled concrete fragments of 5-30mm serving as coarse aggregates in the recycled concrete; according to the volume of each cubic meter of the recycled concrete, 200-1,400kg of the coarse aggregate recycled concrete, 400-600kg of cement, 150-300kg of water and 150-1,500kg of fine sands are mixed sufficiently; the steel tube of the steel rib-steel tube recycled concrete combined column is coated by recycled concrete, and concrete can be filled in the steel tube. The steel rib-steel tube recycled concrete combined column is a main component of a building frame structure in high-rise buildings, and has the characteristics of high bearing capacity, high rigidity, light weight, good plasticity and toughness, good impact and fatigue resistance, excellent earthquake resistance and the like.

Description

technical field [0001] The invention relates to a concrete member, in particular to a steel frame-steel tube recycled concrete composite column used in civil engineering, which is a new type of steel tube concrete composite column. Background technique [0002] In "concrete-filled steel tube structure", concrete-filled steel tube columns can be divided into concrete-filled steel tube columns with steel tubes on the outside of the column and concrete-filled steel tube columns with steel tubes inside the column. The former is usually called steel tube concrete column, and the latter is usually called steel tube concrete composite column . Due to the complicated construction of steel tube concrete columns and the need for fireproofing and antirust treatment of steel tubes, steel tube concrete composite columns are mostly used in the construction of high-rise buildings and bridge structures. In composite steel tube concrete columns, the strength grade of the concrete inside the...

AI Technical Summary

Problems solved by technology

3) Since the ductility of concrete-filled steel tube composite columns is mainly provided by longitudinal reinforcement, more longitudinal reinforcement is often required, resulting in difficulties in construction

4) Studies have shown that the inner and outer concrete of this type of column cannot work well together until failure

However, at present, due to the inherent damage of recycled aggregates and the high water absorption rate caused by the adsorption of a layer of old mortar on its surface, the strength, shrinkage and durability of recycled concrete are poorer than ordinary concrete. The earth limits its scope of use

In order to promote the utilization of recycled concrete, by analyzing the previous research results, a steel frame-steel tube recycled concrete composite column was invented, which can not only solve the shortage of reinforced concrete special-shaped columns, but also use construction waste to directly or indirectly recycle waste concrete. It's a good idea to reuse

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