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Concrete filled steel tubular structure based on deformation and energy absorption principles and having multi-disaster combined protection function

A technology of steel pipe concrete and protective functions, which is applied in the direction of fire protection, earthquake resistance, building components, etc., and can solve problems such as local buckling, inner structure bearing impact, structural damage, etc., and achieve the effect of avoiding structural instability

Pending Publication Date: 2018-12-28
YANGTZE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In actual use, the existing concrete-filled steel tube structures mainly have the following defects: (1) Due to the perennial dynamic load, it is easy to cause the inner structure to directly bear the impact, and local buckling is prone to occur, which eventually leads to the destruction of the steel tube concrete structure; ( 2) When protecting against coupled disasters such as fire and impact, the protection ability is weak or the protection function is single, which is easy to cause rapid structural damage and instability, which limits the development and application of steel pipe concrete structures

Method used

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  • Concrete filled steel tubular structure based on deformation and energy absorption principles and having multi-disaster combined protection function
  • Concrete filled steel tubular structure based on deformation and energy absorption principles and having multi-disaster combined protection function
  • Concrete filled steel tubular structure based on deformation and energy absorption principles and having multi-disaster combined protection function

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Effect test

Embodiment 1

[0025] Such as figure 1 The first type of multi-hazard combined protective function steel tube concrete structure based on the principle of deformation and energy absorption shown in the present invention includes a steel tube 1 and a protective cover 2 sleeved on the outer circumference of the steel tube 1. The inner cavity of the steel tube 1 is poured with a concrete column 3. The cross-sectional shapes of the steel pipe 1 and the protective cover 2 are both circular, and the protective cover is made of a metal material with high strength and high temperature resistance (such as manganese steel). The concrete column 3 is made of conventional concrete and designed according to actual load requirements, but is not limited to conventional concrete, and can be mixed with fibers or admixtures to form high-performance concrete.

[0026] The protective cover 2 mainly plays a role of fire prevention. It prevents the flame from directly ablating the inner steel tube concrete structure a...

Embodiment 2

[0035] Such as figure 2 The second embodiment of the present invention shows a multi-hazard combined protective function steel tube concrete structure based on the principle of deformation and energy absorption. In this embodiment 2, on the basis of embodiment 1, a section steel 8 is embedded inside the steel tube 1 to increase the structure The overall stiffness to meet the needs of the structure when the load is large. The section steel 8 can be in the form of an I-beam. The section steel 8 is preliminarily placed before pouring the concrete column 3 in the manufacturing step 1 of the embodiment 1 and then the concrete is poured. The other manufacturing steps are the same as those of the embodiment 1.

Embodiment 3

[0037] Such as image 3 The third embodiment of the present invention shows a multi-hazard combined protective function steel pipe concrete structure based on the principle of deformation and energy absorption. The implementation and production steps of this embodiment 3 are the same as those of embodiment 1, except that the steel pipe 1 and the protective cover 2 are horizontal The cross-sectional shape is set to a rectangular shape, and the corrugated plate assembly 6 of each circle is arranged in a rectangular shape by several corrugated steel plates 6.1 to meet the needs of other square columns, rectangular columns, beams, and plate structures.

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Abstract

The invention discloses a concrete filled steel tubular structure based on deformation and energy absorption principles and having a multi-disaster combined protection function. The structure comprises a steel tube and a protecting cover arranged on the periphery of the steel tube in a sleeving manner, wherein a concrete column is poured in an inner cavity of the steel tube; a cavity for accommodating air is defined by the outer wall of the steel tube and the inner wall of the protecting cover, and an air grille fixedly connected with the outer wall of the steel tube and the inner wall of theprotecting cover is arranged in the cavity and comprises a plurality of corrugated plate assemblies around the periphery of the steel tube. The air grille is arranged in the cavity formed by the steeltube and the protecting cover and filled with air, thereby achieving certain thermal-insulating and fireproof effects, furthermore, the air grille can produce obvious plastic deformation under the impact action and absorbs impact energy, and the internal layer structure is prevented from directly bearing impact and being damaged.

Description

Technical field [0001] The invention relates to the technical field of steel tube concrete structures, in particular to a multi-hazard combined protective function steel tube concrete structure based on the principle of deformation and energy absorption. Background technique [0002] Concrete-filled steel tube is a structural member that is filled with concrete to form a structural member that can bear external loads. Steel and concrete are used to make up for each other's weaknesses and give full play to each other's strengths. Conventional concrete-filled steel tube structural members are mainly composed of various columns, beams, slabs or composite structures, and they are more and more widely used in large-span, heavy-load, and light-weight bridges. [0003] In actual use, the existing concrete-filled steel tube structure mainly has the following defects: (1) Due to the perennial dynamic load, it is easy to cause the inner structure to directly bear the impact, and it is prone ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04C3/32E04C3/34E04B1/94E04B1/98
CPCE04B1/944E04B1/98E04C3/32E04C3/34
Inventor 郝勇陈誉杜国锋曾磊谢向东张继承吴林松阳霞路世伟黄德文何康
Owner YANGTZE UNIVERSITY
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