Wrapping composite fireproof structure for square steel tube concrete combined column

Abstract

The invention discloses a wrapping composite fireproof structure for a square steel tube concrete combined column. The wrapping composite fireproof structure comprises a flexible fireproof inner layerand a single-layer fireproof plate arranged on the outer side of the flexible fireproof inner layer. The single-layer fireproof plate and the flexible fireproof inner layer are fixed to light steel keels. The light steel keels comprise the inter-column light steel keels and the column end light steel keels. Each inter-column light steel keel is fixed between every two adjacent column limbs of thecombined column. The fixing faces of the sides of fireproof layers formed by the inter-column light steel keels are flush with the side faces of the column limbs of the combined column. The fixing faces of the ends of fireproof layers formed by the column end light steel keels are parallel to the end faces of the combined column. The flexible fireproof inner layer is flat attached to and wraps the periphery of the combined column. According to the wrapping composite fireproof structure, the fire resistance of the square steel tube concrete combined column is enhanced, and the duration of fireresistance of the square steel tube concrete combined column is increased; and meanwhile, the thickness of a traditional wrapping fireproof structure can be effectively decreased.

Description

technical field [0001] The invention relates to an outsourcing fireproof structure of a building structure, in particular to a composite material outsourcing fireproof structure of a square steel tube concrete composite column. Background technique [0002] With the increasing promotion and development of steel structure residences, its fire protection has become a key issue affecting structural safety. At present, the fire-proof construction measures of ordinary concrete-filled steel tube columns have become more and more mature. However, there are still few studies on the fire protection methods of composite columns connected by single-leg concrete-filled steel tube columns through patch panels. For the fire protection of steel structures, the most common constructions are fire-resistant coatings and fire-resistant panels. The cross-sectional size of a single leg of a composite column is small, usually only 150mm×150mm. If fire-resistant coatings are used for outsourcing...

AI Technical Summary

Problems solved by technology

The cross-sectional size of a single leg of a composite column is small, usually only 150mm×150mm. If fire-resistant coatings are used for outsourcing protection, there is no design method for the fire-resistant coating protection layer of small-section concrete-filled steel tube columns in the current code. If the fire protection is carried out according to pure steel structures The design of paint thickness will cause a lot of waste, and the shape of the composite column is complex and the surface area is large. The use of paint for fire protection is cumbersome and requires a large amount of construction, which does not meet the concept of assembly of steel structure houses.

If the fire-proof board is used for outsourcing protection, there are currently problems such as excessive thickness of the fire-proof board and unreliable installation and connection. Therefore, it is urgent to study new fire-proof structures to meet the fire-proof performance of houses and the assembly requirements of steel-structure houses.

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