Uhpc-based I-shaped steel beam fireproof and anticorrosion structure

Abstract

The invention discloses a uhpc-based I-shaped steel beam fireproof and anticorrosion structure. The uhpc-based I-shaped steel beam fireproof and anticorrosion structure comprises a first fireproof layer, second fireproof layers, an outer wrapping anti-cracking layer and a uhpc anti-corrosion layer, wherein the first fireproof layer is arranged on the top surface of an upper flange plate and the bottom surface of a lower flange plate and completely covers the width of the upper flange plate and the width of the lower flange plate; the second fireproof layers are arranged on the two sides of a web plate and completely or at least mostly cover the height of the web plate; the outer wrapping anti-cracking layer completely wraps I-shaped steel beam, the first fireproof layer and the second fireproof layers from the periphery; the uhpc anti-corrosion layer is formed by pouring uhpc on the periphery of the outer wrapping anti-cracking layer and completely wraps the outer wrapping anti-cracking layer, the I-shaped steel beam, the first fireproof layer and the second fireproof layer from the periphery. According to the uhpc-based I-shaped steel beam fireproof and anticorrosion structure, the comprehensive performance of the uhpc is brought into full play, durability is good, corrosion resistance and anti-seepage performance are good, cracking cannot occur generally, small cracks have the self-repairing capacity, and the defect that a traditional steel structure needs to be maintained every ten years in the operation and maintenance period is overcome; complete factory batch production is realized, the process is simple, and the production efficiency is high; on-site wet operation is little, and environmental protection is achieved.

Description

technical field [0001] The invention relates to the technical field of building structures, in particular to building structure fire prevention and anticorrosion technology, in particular to a UHPC-based I-beam fire prevention and anticorrosion structure. Background technique [0002] The current anti-corrosion and fire prevention measures for building steel structures, especially I-beam beams, mainly include the following: [0003] (1) Anti-corrosion coating + fire-proof coating: This is the most common fire-proof and anti-corrosion solution for steel structures. First brush the anti-corrosion paint on the surface of the steel structure. After the steel structure is installed on the construction site, apply the anti-rust paint and anti-corrosion paint, and then spray the fire-resistant paint. [0004] (2) Anti-corrosion paint + fire-resistant blocks: firstly paint the surface of the steel structure with anti-corrosion paint, and after the steel structure is installed on th...

AI Technical Summary

Problems solved by technology

[0007] (1) Anti-corrosion coating + fire-proof coating: Spraying fire-proof coating on site requires a large amount of construction and is not suitable for construction in harsh environments; fire-proof coating is easy to peel off; poor durability, every 10 years inspection required for repair

[0008] (2) Anti-corrosion coating + fireproof blocks: on-site block masonry and plastering, the construction volume is large, and it is not suitable for construction in harsh environments; fireproof blocks are easy to peel off ; Poor durability, need inspection and repair every 10 years

[0009](3) Steel-reinforced concrete beam: complex structure, long construction period, high cost, difficult to realize prefabricated building construction

[0010]In addition, most of the current anti-corrosion and fire protection measures follow the principle of anti-corrosion first, and then fire protection. The fire-proof materials or coatings are exposed, and are prone to corrosion, Damage, cracking, falling off, etc., resulting in poor durability of this practice

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