CN219710758U - Longitudinal prestress buckling-preventing double-steel-tube concrete column - Google Patents

Longitudinal prestress buckling-preventing double-steel-tube concrete column Download PDF

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CN219710758U
CN219710758U CN202223011968.3U CN202223011968U CN219710758U CN 219710758 U CN219710758 U CN 219710758U CN 202223011968 U CN202223011968 U CN 202223011968U CN 219710758 U CN219710758 U CN 219710758U
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steel pipe
steel
tube
concrete column
sleeve
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CN202223011968.3U
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陈适才
刘澍邦
周大兴
侯立群
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Beijing University of Technology
China Railway Construction Group Co Ltd
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Beijing University of Technology
China Railway Construction Group Co Ltd
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Abstract

A longitudinal prestress buckling-preventing double-steel-tube concrete column relates to the field of steel-tube concrete column combined structures. The outer steel pipe is connected through the additional steel pipe, so that the longitudinal prestress of the outer steel pipe can be adjusted. The utility model can be widely applied to steel pipe concrete structures and industrial and civil high-rise building structures with higher requirements on stress performance. According to the utility model, the initial compressive stress of the outer steel pipe can be eliminated by rotating the additional steel pipe, the pre-tensioning stress can be further generated, and the occurrence of longitudinal local buckling of the outer steel pipe is reduced or even avoided by adjusting the pre-tensioning stress; meanwhile, the stress performance of the concrete-filled steel tube column is superior to that of a common concrete-filled steel tube column, and the concrete-filled steel tube column has the characteristics of assembly type, standardized production in factories, rapid self-connection assembly in site, convenient and rapid construction, low cost of materials used in the concrete-filled steel tube column, simple structure and good connection performance.

Description

Longitudinal prestress buckling-preventing double-steel-tube concrete column
Technical Field
The utility model relates to the field of steel tube concrete column combined structures, in particular to a longitudinal prestress buckling-preventing double steel tube concrete column.
Background
The steel pipe concrete column is the vertical atress component that various structures such as present high-rise stride are commonly adopted, two steel pipe concrete columns are the component form that some high-axis pressure ratio high-rise structures adopted, in the high-rise structural construction process, generally install the steel pipe column earlier, carry out beam slab component construction on the steel pipe column again, wait for the upper structure construction to accomplish the back, carry out the pouring of the inside concrete of steel pipe column again, so the steel pipe of steel pipe concrete column has very big initial vertical internal force, not only make the cross-section atress of steel pipe concrete column unreasonable, still make the steel pipe of steel pipe concrete column easily take place the local buckling of pressurized in the later stage, can not exert the lateral restraint effect of steel pipe. At present, the steel tube concrete column is generally subjected to fireproof protection, so that the influence of high temperature is avoided, meanwhile, the steel tube outside the column is protected from buckling damage at high temperature, but the steel tube is not affected under the condition of increasing the upper load at normal temperature, such as earthquake. Therefore, the development of the steel tube concrete column can ensure the transverse constraint effect of the steel tube and reduce the longitudinal internal force of the steel tube to prevent buckling, so that the stress performance of the structure is improved, and the steel tube concrete column has important significance for application and development of a combined structure.
Disclosure of Invention
The utility model aims to provide a longitudinal prestress buckling-restrained double-steel-tube concrete column, which aims to solve the problem of initial compressive stress existing on an outer-layer steel tube of the steel-tube concrete column, prevent buckling, improve the stress performance of a component, ensure simple and quick construction and are beneficial to the application technical problem of the steel-tube concrete column.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the longitudinal prestress buckling-preventing double-steel-tube concrete column is characterized in that the center of a hollow concrete column (1) is an inner-layer steel tube (2), the upper part of the outer layer of the hollow concrete column is an upper steel tube (5), the lower part of the hollow concrete column is a lower steel tube (4), and the hollow concrete column are connected through a sleeve steel tube (6) sleeved outside the hollow concrete column through threads; the outer surface of the upper end of the lower steel pipe (4) is provided with threads, the outer surface of the lower end of the upper steel pipe (5) is provided with threads, the inner surface of the sleeve steel pipe (6) is provided with threads, a gap is reserved between the lower steel pipe (4) and the upper steel pipe (5) in the axial direction, and the sleeve steel pipe (6) is correspondingly positioned outside the gap.
The longitudinal stress buckling-restrained double-steel-tube concrete column is characterized in that the radiuses of a lower steel tube (4) and an upper steel tube (5) are the same, and the radius of a sleeve steel tube (6) is the radius of the lower steel tube (4) and the radius of the upper steel tube (5) plus the thread depth; when construction is matched, the lower steel pipe (4) is fixed, the lower steel pipe (4) and the sleeve steel pipe (6) can be connected by rotating the sleeve steel pipe (6) clockwise, the upper steel pipe (5) and the lower steel pipe (6) can be connected by rotating the upper steel pipe (5) anticlockwise, and finally the lower steel pipe (4) and the upper steel pipe (5) can be axially screwed by rotating the sleeve steel pipe (6).
The longitudinal prestress buckling-preventing double-steel-tube concrete column is characterized in that a lower steel tube (4), an upper steel tube (5) and a sleeve steel tube (6) are connected into an integrated structure through threads; the axial heights of the screw threads at the end parts of the lower steel pipe (4) and the upper steel pipe (5) are the same and are half of the axial height of the sleeve steel pipe (6), the axial heights of the sleeve steel pipe (6) are provided with screw threads, and the axial reserved gap between the lower steel pipe (4) and the upper steel pipe (5) is larger than the axial height of the sleeve steel pipe (6) by adding the axial heights of the screw threads of the lower steel pipe (4) and the upper steel pipe (5).
The longitudinal pre-stress buckling-restrained double-steel-tube concrete column is characterized in that after the column construction is completed, a reserved gap is reduced by screwing the lower steel tube (4) and the upper steel tube (5) through the rotating sleeve steel tube (6), so that pre-stress is generated on the outer steel tube, and the longitudinal pre-stress buckling-restrained double-steel-tube concrete column is realized by adjusting the pre-stress.
The longitudinal prestress buckling-restrained double-steel-tube concrete column is characterized in that the section of an inner steel tube of the column of the longitudinal prestress buckling-restrained double-steel-tube concrete column is round or square, and the column can be made of stainless steel, high-strength steel or FRP (fiber reinforced plastic) other composite material tubes.
Compared with the prior art, the utility model has the following characteristics and beneficial effects:
(1) According to the utility model, the outer layer steel pipe is connected through the additional steel pipe, the initial compressive stress of the outer layer steel pipe can be eliminated through rotating the additional steel pipe, the pre-tensioning stress can be further generated, and the occurrence of longitudinal local buckling of the outer layer steel pipe is reduced or even avoided through adjusting the pre-tensioning stress.
(2) The outer layer steel tube of the steel tube concrete column avoids longitudinal local buckling, and meanwhile, the lateral constraint and the bending bearing capacity of the outer layer steel tube are not reduced due to the lateral constraint of the inner side concrete, and the stress performance of the steel tube concrete column is superior to that of a common steel tube concrete column due to the fact that the steel tube is provided with an accessory steel tube and even is lifted.
(3) The assembly type self-connecting assembly type steel wire rope has the characteristics of assembly type, can be produced in a factory in a standardized manner, can be assembled in a quick and self-connecting manner on site, and is convenient and quick to construct.
(4) The material used has low cost, simple structure and good connection performance.
The utility model overcomes the defects of the traditional common steel tube concrete column, solves the technical problem that the steel tube concrete column is easy to locally compress and flex in the longitudinal direction, and can be widely applied to steel tube concrete structures and industrial and civil high-rise building structures with higher requirements on stress performance.
Drawings
The utility model is described in further detail below with reference to the accompanying drawings.
FIG. 1 is a schematic view of a longitudinal prestress buckling-preventing double-steel-pipe concrete column structure; (a) is a schematic cross-sectional view of the column of the present utility model; (b) is an overall effect diagram of the present utility model at the time of installation; (c) is a partial view of an additional steel pipe according to the present utility model.
FIG. 2 is a schematic diagram of the installation process of the longitudinal prestress buckling-preventing double-steel-pipe concrete column; (a) Is a schematic diagram after the outer layer steel pipe (4) and the connecting steel pipe (6) are arranged in the utility model; (b) Is a schematic view of the utility model after the installation of the inner steel pipe (2); (c) Is a drawing after further installing part of the outer layer steel pipe (5) of the present utility model; (d) The pre-stress buckling-preventing double-steel-tube concrete column is provided with the pre-stress buckling-preventing double-steel-tube concrete column after the steel tube (6) is screwed after being installed.
The hollow concrete column (1), an inner layer steel tube (2), an upper steel tube (5), a sleeve steel tube (6) and threads (7).
Detailed Description
The present utility model will be further illustrated with reference to the following examples, but the present utility model is not limited to the following examples.
Example 1
See fig. 1-2: a longitudinal prestress buckling-preventing double-steel-tube concrete column is characterized in that an outer-layer steel tube is divided into a lower steel tube (4) and an upper steel tube (5), and the lower steel tube and the upper steel tube are connected through a sleeve steel tube (6); wherein the outer surface of the upper end of the lower steel pipe (4) is provided with threads (7), the outer surface of the lower end of the upper steel pipe (5) is provided with threads (7), and the inner surface of the sleeve steel pipe (6) is symmetrically provided with threads (8).
The radius of the lower steel pipe (4) is the same as that of the upper steel pipe (5), and the radius of the sleeve steel pipe (6) is the sum of the radius of the steel pipe (4) and the radius of the upper steel pipe (5) and the screw depth; the lower steel pipe (4) and the sleeve steel pipe (6) can be connected by rotating the steel pipe (6) clockwise, the steel pipe (6) and the upper steel pipe (5) can be connected by rotating the upper steel pipe (5) anticlockwise, and finally the lower steel pipe (4) and the upper steel pipe (5) can be screwed simultaneously by rotating the sleeve steel pipe (6).
The longitudinal prestress buckling-preventing double-steel-tube concrete column is characterized in that a lower steel tube (4), an upper steel tube (5) and a sleeve steel tube (6) are of an integrated structure. The screw thread heights of the end parts of the lower steel pipe (4) and the upper steel pipe (5) are the same and are half L2/2 of the height of the sleeve steel pipe (6), and the reserved gap can be: l1=l3-L2, wherein L3 is the axial height of the thread of the lower steel pipe (4) plus the axial height of the thread of the upper steel pipe (5) plus the axial reserved gap L1 between the lower steel pipe (4) and the upper steel pipe (5); l2 is the axial height of the sleeve steel pipe (6).
The longitudinal pre-stress buckling-restrained double-steel-tube concrete column is characterized in that after the column construction is completed, a reserved gap is reduced by screwing the lower steel tube (4) and the upper steel tube (5) through the rotating sleeve steel tube (6), so that pre-stress is generated on the outer steel tube, and the size of the pre-stress is adjusted, so that the longitudinal pre-stress buckling-restrained double-steel-tube concrete column is realized.
The implementation process of the utility model comprises the following steps:
step one, rotating the sleeve steel pipe (6) to connect the outer layer lower steel pipe (4) with the sleeve steel pipe (6);
and step two, installing the inner layer steel pipe in the center.
And thirdly, keeping the outer layer lower steel tube (4) and the sleeve steel tube (6) motionless, and rotating the outer layer upper steel tube (5) to realize the installation of the whole outer steel tube.
And fourthly, pouring concrete, and after the integral structure is formed, screwing the sleeve steel pipe (6) to enable the outer steel pipe to generate the predicted prestress level, so that the longitudinal prestress buckling-preventing double-steel-pipe concrete column is realized.
The above is a typical embodiment example of the present utility model, and the present utility model is not limited thereto.

Claims (3)

1. The longitudinal prestress buckling-preventing double-steel-tube concrete column is characterized in that the center of a hollow concrete column (1) is an inner-layer steel tube (2), the upper part of the outer layer of the hollow concrete column is an upper steel tube (5), the lower part of the hollow concrete column is a lower steel tube (4), and the hollow concrete column are connected through a sleeve steel tube (6) sleeved outside the hollow concrete column through threads; the outer surface of the upper end of the lower steel pipe (4) is provided with threads, the outer surface of the lower end of the upper steel pipe (5) is provided with threads, the inner surface of the sleeve steel pipe (6) is provided with threads, a gap is reserved between the lower steel pipe (4) and the upper steel pipe (5) in the axial direction, and the sleeve steel pipe (6) is correspondingly positioned outside the gap;
the radius of the lower steel pipe (4) is the same as that of the upper steel pipe (5), and the radius of the sleeve steel pipe (6) is the sum of the radius of the lower steel pipe (4) and the radius of the upper steel pipe (5) and the screw depth; when construction is matched, the lower steel pipe (4) is fixed, the lower steel pipe (4) and the sleeve steel pipe (6) can be connected by rotating the sleeve steel pipe (6) clockwise, the upper steel pipe (5) can be connected by rotating the upper steel pipe (5) anticlockwise, and finally the lower steel pipe (4) and the upper steel pipe (5) can be axially screwed by rotating the sleeve steel pipe (6);
after the column construction is completed, the reserved gap is reduced by screwing the lower steel tube (4) and the upper steel tube (5) through the rotating sleeve steel tube (6), so that the outer steel tube generates pre-stressing force, and the longitudinal pre-stressing force buckling-preventing double steel tube concrete column is realized through adjusting the pre-stressing force.
2. A longitudinal prestress buckling-restrained double-steel-tube concrete column according to claim 1, characterized in that the lower steel tube (4), the upper steel tube (5) and the sleeve steel tube (6) are connected into an integrated structure through threads; the axial heights of the screw threads at the end parts of the lower steel pipe (4) and the upper steel pipe (5) are the same and are half of the axial height of the sleeve steel pipe (6), the axial heights of the sleeve steel pipe (6) are provided with screw threads, and the axial reserved gap between the lower steel pipe (4) and the upper steel pipe (5) is larger than the axial height of the sleeve steel pipe (6) by adding the axial heights of the screw threads of the lower steel pipe (4) and the upper steel pipe (5).
3. A longitudinal prestressed buckling restrained double-steel-tube concrete column according to claim 1, wherein the column of the longitudinal prestressed buckling restrained double-steel-tube concrete column has a circular or square inner steel tube section shape, and the material is stainless steel, high-strength steel or FRP composite material tube.
CN202223011968.3U 2022-11-11 2022-11-11 Longitudinal prestress buckling-preventing double-steel-tube concrete column Active CN219710758U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202223011968.3U CN219710758U (en) 2022-11-11 2022-11-11 Longitudinal prestress buckling-preventing double-steel-tube concrete column

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202223011968.3U CN219710758U (en) 2022-11-11 2022-11-11 Longitudinal prestress buckling-preventing double-steel-tube concrete column

Publications (1)

Publication Number Publication Date
CN219710758U true CN219710758U (en) 2023-09-19

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