Steel bar reinforced ECC-steel pipe concrete composite column

A technology of steel pipe concrete and composite columns, which is applied in the direction of columns, pier columns, pillars, etc., can solve the problems of insufficient durability, poor synergy between outer layer concrete and inner layer steel pipes, etc., and achieve cost reduction, superior ability to control cracks, The effect of high residual strength

Inactive Publication Date: 2015-07-15
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This component has good fire resistance and light weight, but there are still disadvantages such as poor synergy between the outer concrete and the inner steel pipe, and insufficient durability.
[0006] To sum up, the durability, anti-seismic performance, and fire resistance of the existing composite columns still need to be improved. How to improve the safety, applicability and durability of the composite columns in all aspects by combining new materials is the starting point of the present invention where the

Method used

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  • Steel bar reinforced ECC-steel pipe concrete composite column
  • Steel bar reinforced ECC-steel pipe concrete composite column
  • Steel bar reinforced ECC-steel pipe concrete composite column

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The reinforced ECC-concrete filled steel tube composite column of this embodiment is as follows: figure 1 and figure 2As shown, it is composed of the outer layer reinforced ECC and the inner layer concrete filled steel tube. The inner layer steel tube concrete is filled with core concrete 1 in the steel tube 2; the outer reinforced ECC is composed of longitudinal bars 4 and circular stirrups 5 to form a steel skeleton , and pouring the external ECC3 composition. The inner steel pipe 2 is an ordinary circular steel pipe, the outer reinforced ECC is flush with the end face of the inner concrete filled steel pipe, and the circular ring formed by the outer reinforced ECC3 coincides with the geometric centroid of the circular section of the inner reinforced steel filled steel pipe.

Embodiment 2

[0050] The reinforced ECC-concrete filled steel tube composite column of this embodiment is as follows: image 3 and Figure 4 As shown, it is composed of the outer layer reinforced ECC and the inner layer concrete filled steel tube. The inner layer steel tube concrete is filled with core concrete 1 in the steel tube 2; the outer reinforced ECC is composed of longitudinal bars 4 and circular stirrups 5 to form a steel skeleton , and pouring the external ECC3 composition. The inner steel pipe 2 is an ordinary square steel pipe, the outer reinforced ECC is flush with the end face of the inner concrete filled steel pipe, and the section formed by the outer reinforced ECC3 coincides with the geometric centroid of the square section of the inner reinforced steel filled steel pipe.

Embodiment 3

[0052] The reinforced ECC-concrete filled steel tube composite column of this embodiment is as follows: Figure 5 and Figure 6 As shown, it is composed of the outer layer reinforced ECC and the inner layer concrete filled steel tube. The inner layer steel tube concrete is filled with core concrete 1 in the steel tube 2; the outer reinforced ECC is composed of longitudinal bars 4 and circular stirrups 5 to form a steel skeleton , and pouring the external ECC3 composition. The inner steel pipe 2 is an ordinary rectangular steel pipe, the outer reinforced ECC is flush with the end face of the inner concrete filled steel pipe, and the section formed by the outer reinforced ECC3 coincides with the geometric centroid of the rectangular section of the inner reinforced steel filled steel pipe.

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Abstract

The invention relates to a steel bar reinforced ECC-steel pipe concrete composite column, which belongs to the technical field of civil engineering. The steel bar reinforced ECC-steel pipe concrete composite column comprises core concrete, steel pipes, external ECC, longitudinal bars and stirrups. External steel bar reinforced ECC and internal steel pipe concrete may separately adopt section forms selected from a group consisting of a circular shape, a square shape, a rectangular shape, a polygonal shape, a round end shape, an oval shape, etc. The steel bar reinforced ECC-steel pipe concrete composite column has the same characteristics of high bearing capacity and strong buckling strength as common steel pipe concrete laminated columns; moreover, since the external ECC material is a fiber reinforced cement-based composite material with strain hardening and fine multi-crack cracking mechanisms, shock resistance and durability of a member can be greatly improved. The steel bar reinforced ECC-steel pipe concrete composite column can be applied as a column member for a high-rise structure, a bridge construction, an ocean platform and other related high-rising buildings.

Description

technical field [0001] The invention relates to a load-bearing concrete component of a building, in particular to a reinforced ECC-concrete steel tube composite column. Background technique [0002] In recent ten years, CFST has been widely used in high-rise buildings and bridge projects due to its advantages of high bearing capacity, light weight, good seismic performance, and convenient construction, and has achieved good economic and social benefits. However, in actual engineering, CFST still has defects such as easy local buckling, poor durability, and insufficient fire resistance. In order to improve the durability and fire resistance of CFST structures, some scholars have proposed CFST composite column structures, which have been applied and developed to a certain extent in recent years. The concrete-filled steel tube composite column is composed of external reinforced concrete and internal steel tube concrete. Compared with ordinary steel tube concrete, the steel tub...

Claims

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Application Information

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IPC IPC(8): E04C3/34
CPCY02A30/30
Inventor 潘金龙蔡景明
Owner SOUTHEAST UNIV
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