High-strength spiral hoop confined high-strength wide flange cross-shaped steel reinforced octagonal concrete column

Abstract

The invention relates to steel reinforced concrete columns, particularly to a high-strength spiral hoop confined high-strength wide flange cross-shaped steel reinforced octagonal concrete column, which overcomes the defects of the cross-shaped steel reinforced concrete column that the construction is difficult, the thickness of the concrete protective layer causes the insufficient realization of the bending resistance of the steel reinforced, and the high-strength steel reinforced has high possibility of lateral deflection. As the longitudinal reinforcing steel is removed, the area of the reinforcing steel is converted to the steel reinforced flange, the construction and design of the steel reinforced concrete column are facilitated; the spiral hoop is the high-strength octagonal spiral hoop, the inner side of the spiral hoop of the confined steel reinforced flange is closely attached to the surface of the steel reinforced flange, the unstability critical stress of the steel reinforced flange is improved through the free edge of the confined steel reinforced flange, and the spiral hoop is closely joined with the flange at the same time, so as to realize the action of stud, as a result, the coordination between the concrete and the steel reinforced is better realized; the concrete protective layer of the steel reinforced ranges from 30 to 40mm., so as to meet the requirement of fire prevention and enables the steel reinforced to better realize the action of bending resistance; and as the area cut from the octagonal concrete column is less than 8%, the area can be compensated by improving the concrete strength. The high-strength spiral hoop confined high-strength wide flange cross-shaped steel reinforced octagonal concrete column is applied to the steel reinforced concrete structures.

Description

technical field [0001] The invention relates to a steel concrete column. Background technique [0002] Shaped steel concrete column refers to the structure that configures shaped steel in concrete, and is equipped with certain transverse stirrups and longitudinal reinforcement bars. The medium-sized steel in the column mainly includes I-shaped steel, H-shaped steel and cross-shaped steel. Steel concrete columns have the advantages of high bearing capacity, high rigidity and good seismic performance, and have been widely used in long-span structures and high-rise buildings in earthquake zones. [0003] In steel-concrete columns, two materials with different properties, steel and concrete, can work together because of the bonding effect between them. Since the surface of the steel is smooth, the bond strength between the steel and concrete is equivalent to that of a smooth round steel bar and concrete. 60% of the threaded steel bar and 30% of the bond strength of concrete. In...

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Problems solved by technology

The invention aims to solve the inconvenience of construction of the existing cross-shaped steel concrete column, the thickness of the concrete protective layer causes the medium steel in the column to not fully exert its bending resistance, the strength of the stirrup is low, and the end has a 135° hook at the end, which is easy to loose during an earthquake and causes damage to the concrete and steel. A series of shortcomings such as unsatisfactory restraint effect, easy buckling of high-strength steel, inconvenient application in engineering, etc.

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