Fire-resistant and bearing integrated lattice structure of composite material and preparation method of lattice structure

Abstract

The invention discloses a fire-resistant and bearing integrated lattice structure of a composite material and a preparation method of the lattice structure. The fire-resistant and bearing integrated lattice structure of the composite material comprises lattice cores, an upper panel, a lower panel, a heat insulation filling layer and fire-resistant coating layers, wherein the fire-resistant coating layers comprise an inner adhesion layer and an outer fire-resistant layer; the adhesion layer is a coating with reinforced fibers and is used for tightly adhering the fire-resistant layer to a flat lattice plate. The exposed surface of the composite material is coated with the two fire-resistant coating layers; the lattice cores in the two panels are filled with heat insulation materials; under the conditions that the temperature of the exposed surface is 960 DEG C and is kept for more than one hour and the integrity of the lattice structure is unchanged, the temperature of the unexposed surface is only 150 DEG C and is lower than that of the unexposed surface of a steel structure with the same thickness as the lattice structure by about 100 DEG C, so that the safety of devices and people is protected; the fire-resistant and bearing integrated lattice structure of the composite material can meet high fire resistance grade, a preparation process is simple, automated production can be realized, and the cost is low.

Description

technical field [0001] The invention belongs to the field of engineering structures, and in particular relates to a refractory bearing integrated lattice structure of composite materials and a preparation method thereof. Background technique [0002] As a typical lightweight structural functional material, the honeycomb sandwich structure has high specific stiffness and specific strength. It is a structure that solves light weight and has a certain bearing capacity from the structural point of view. Its improved structure also has a certain degree of application in the field of fire resistance. . Existing fire-resistant functions are achieved by improving the honeycomb structure: for metal honeycombs, fire-resistant panels are added outside the alloy honeycomb sandwich panel to achieve the purpose of fire resistance. There is a certain porosity in the structure, which reduces the weight to a certain extent. But the overall weight is affected by the density of the base metal...

AI Technical Summary

Problems solved by technology

However, since the high temperature resistance of resin-based composite materials generally does not exceed 250°C, the fire resistance is poor, and when a fire occurs, the epitaxial temperature of the material reaches about 1000°C

Therefore, the existing fire-resistant facilities such as buildings, trains, and ships are mostly reinforced concrete structures or steel structures, and reinforced concrete structures and steel structures generally have the defects of large fire-resistant intervals and heavy weight; this traditional fire-resistant structure design It has brought a large energy consumption burden to trains, ships and building structures, which no longer meet the design requirements of high efficiency and low energy consumption

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