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A fire-resistant composite floor slab and its fire-resistant performance testing method

A combination of floor slab and fire-resistant performance technology, applied in the direction of floor slab, fire protection, construction, etc., to achieve the effect of reducing deformation range, simplifying coating, saving maintenance costs and costs

Active Publication Date: 2021-07-13
BAIANLI STEEL STRUCTURE APPL SCI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The improvement of fire resistance brought by this new structural form has not been fully understood and incorporated into the code design ideas, and the fire resistance design method for this type of component needs to be thoroughly and systematically studied and re-proposed.

Method used

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  • A fire-resistant composite floor slab and its fire-resistant performance testing method
  • A fire-resistant composite floor slab and its fire-resistant performance testing method
  • A fire-resistant composite floor slab and its fire-resistant performance testing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Such as figure 1As shown, the fire-resistant composite floor slab of this embodiment includes a refractory steel profiled floor deck 10 and concrete 20, the profiled floor deck 10 includes a rib 4 with a closed hollow, and the profiled floor deck 10 The concrete 20 is poured on the profiled floor bearing slab 10, and the upper surface of the concrete 20 is leveled after pouring and cured, and the profiled floor bearing The boards 10 are combined into one and used as a fire-resistant composite floor as a whole; the profiled floor deck 10 is made of fire-resistant steel through integral rolling forming, including the bottom plate 1 and the first fastening parts respectively located at the left and right ends of the bottom plate 1 2 and the second fastening part 3, several ribs 4 arranged at intervals in the middle of the bottom plate 1, the first fastening part 2 of the adjacent profiled floor deck 10 and the first fastening part 2 The two fastening parts 3 are matched a...

Embodiment 2

[0063] Such as figure 2 , image 3 As shown, the difference between the fire-resistant composite floor slab of this embodiment and Embodiment 1 is that in this embodiment, the fire-resistant composite floor slab also includes a crack-resistant steel mesh 8, and the crack-resistant steel mesh 8 adopts steel bars for building structures or fire-resistant Steel reinforcement or refractory and weather-resistant steel reinforcement is formed by cross spot welding, and the crack-resistant steel mesh 8 is erected on the compression zone of the concrete 20 above the profiled floor deck 10, and after pouring the concrete 20 and the The concrete 20 is combined into one body, and the thickness of the concrete 20 above the crack-resistant steel mesh 8 is not less than 20 mm, so as to protect the crack-resistant steel mesh 8 and ensure that it does not fall off and does not come into contact with the outside world and be damaged. corrosion.

[0064]In the actual fire situation, in the t...

Embodiment 3

[0067] Such as Figure 4 As shown, the difference between the fire-resistant composite floor slab of this embodiment and the first embodiment is that the profiled floor deck 10 of this embodiment is a fire-resistant and weather-resistant steel profiled floor deck, and the profiled floor deck 10 is made of fire-resistant and weather-resistant steel Manufactured by integral roll forming, the cross section of the wedge-shaped part of the rib 4 is a regular hexagon, and the first fastening part 2 of the adjacent profiled floor deck 10 and the second After the two fastening parts 3 are fastened and connected, the overall shape of the fastened part is also a regular hexagon, which can further increase the contact area between the profiled rib 4 and the concrete 20, and the profiled floor deck 10 The ability to combine with the concrete 20 is enhanced, and the profiled floor deck 10 is protected by the concrete 20 and will not fall off, preventing it from losing its structural functi...

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Abstract

The invention discloses a fire-resistant composite floor slab and a method for testing its fire-resistant performance. The fire-resistant composite floor slab includes a refractory steel or fire-resistant and weather-resistant steel profiled floor slab with closed hollow ribs, concrete poured on the floor slab, the floor slab is made of a base material without coating and film, and the concrete is cast After the upper surface is scraped and maintained, it is combined with the floor slab and used as a fire-resistant composite floor as a whole. The initial deformation of the fire is delayed and the amplitude is reduced. The bonding performance between the bearing plates is not loose, the degree of deformation recovery and the remaining bearing capacity are both higher than 5%, and it still has a combination effect and integrity. The test methods include material mechanical performance test, shear-bond performance test and fire-resistant performance test of fire-resistant composite floor, residual load-bearing performance test and shear-bond performance test after fire, synthesis of new shear bond-bond coefficient, And summarize the fire safety factor.

Description

technical field [0001] The invention relates to a fire-resistant composite floor; the invention also relates to a method for testing the fire resistance of the fire-resistant composite floor. Background technique [0002] In recent years, with the development of high-rise buildings, steel-concrete composite panels have been increasingly popularized and applied. The so-called composite panel is a structural form that utilizes the material and structural characteristics of steel and concrete to form a whole and work together. At present, the composite panel of profiled steel is more commonly used. Profiled steel plate-concrete composite floor is a load-bearing horizontal partition member in composite structures, and is widely used in high-rise steel structures and multi-story steel structure factory buildings. The profiled steel plate-concrete composite floor system is divided into two situations in actual engineering: one is that the profiled steel plate is only used as a fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04B5/40E04B1/94E04B1/64G01N25/32
CPCE04B1/642E04B1/942E04B5/40G01N25/32
Inventor 彭耀光石永久余香林
Owner BAIANLI STEEL STRUCTURE APPL SCI TECH
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