CN113700331A - Steel pipe concrete composite column and repairing method - Google Patents
Steel pipe concrete composite column and repairing method Download PDFInfo
- Publication number
- CN113700331A CN113700331A CN202110987346.5A CN202110987346A CN113700331A CN 113700331 A CN113700331 A CN 113700331A CN 202110987346 A CN202110987346 A CN 202110987346A CN 113700331 A CN113700331 A CN 113700331A
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- China
- Prior art keywords
- concrete
- steel tube
- composite column
- composite
- repairing
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- 239000002131 composite material Substances 0.000 title claims abstract description 110
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 90
- 239000010959 steel Substances 0.000 title claims abstract description 90
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000006378 damage Effects 0.000 claims abstract description 12
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 11
- 238000004140 cleaning Methods 0.000 claims abstract description 4
- 239000004568 cement Substances 0.000 claims description 11
- 239000000945 filler Substances 0.000 claims description 2
- 238000009415 formwork Methods 0.000 claims 1
- 239000002699 waste material Substances 0.000 abstract description 5
- 238000003912 environmental pollution Methods 0.000 abstract description 3
- 239000002023 wood Substances 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/30—Columns; Pillars; Struts
- E04C3/32—Columns; Pillars; Struts of metal
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/30—Columns; Pillars; Struts
- E04C3/34—Columns; Pillars; Struts of concrete other stone-like material, with or without permanent form elements, with or without internal or external reinforcement, e.g. metal coverings
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
- E04G23/0225—Increasing or restoring the load-bearing capacity of building construction elements of circular building elements, e.g. by circular bracing
Abstract
The invention discloses a method for repairing a concrete-filled steel tube composite column in the technical field of structural engineering, and aims to solve the problem that outer-layer concrete at a plastic hinge of the concrete-filled steel tube composite column cracks or is stripped in advance under the action of an earthquake. The method comprises the following steps of evaluating damage of the concrete-filled steel tube composite column to be repaired, and only when the concrete on the outer layer of the plastic hinge of the concrete-filled steel tube composite column is damaged, performing the following operations: cleaning damaged concrete on the outer layer of the plastic hinge; fixing and supporting the cleaned plastic hinges by using a template and square wood; and (3) pouring a ductile composite material at the plastic hinge after supporting, and reinforcing and repairing the concrete-filled steel tube composite column. The method is suitable for repairing and processing the damage of a part of the concrete-filled steel tube composite column structure caused by the earthquake with smaller earthquake magnitude, and can reduce the waste of resources and time and the environmental pollution caused by the post-earthquake reconstruction with smaller earthquake magnitude.
Description
Technical Field
The invention relates to a concrete filled steel tube composite column and a repairing method thereof, belonging to the field of structural engineering.
Technical Field
China is a multi-earthquake country, earthquakes occur for a plurality of times every year basically, most earthquakes have small earthquake magnitude, and a large amount of dismantling and rebuilding work causes environmental pollution, waste of time, resources and cost and the like.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a concrete-filled steel tube composite column and a repairing method thereof, which can improve the seismic performance of the concrete-filled steel tube composite column and avoid the waste of resources and time and the environmental pollution caused by reconstruction aiming at small seismic levels in the past.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme:
in one aspect, the present invention provides a method for repairing a concrete filled steel tube composite column, including:
and (3) carrying out damage assessment on the steel pipe concrete composite column to be repaired, and carrying out the following operations only when the concrete on the outer layer of the plastic hinge of the steel pipe concrete composite column is damaged:
cleaning damaged concrete on the outer layer of the plastic hinge;
fixing and supporting the cleaned plastic hinge;
and (3) pouring a ductile composite material at the plastic hinge after supporting, and reinforcing and repairing the concrete-filled steel tube composite column.
Further, the injury comprises: the plastic hinge outer concrete cracks and/or peels off.
Further, a support piece is adopted for fixing and supporting, and the support piece comprises a plurality of templates and a plurality of square timbers; the plurality of templates are fixedly connected through the square timber to form a repair area which is arranged around the periphery of the plastic hinge.
Further, the height of the template is not lower than that of the plastic hinge.
Further, the composite material comprises an engineering cement-based composite material.
Furthermore, the pouring thickness of the composite material at least enables the outer diameter of the repaired plastic hinge to be flush with the outer diameter of the non-damaged part of the concrete filled steel tube composite column.
On the other hand, the invention provides a concrete-filled steel tube composite column, which comprises a steel tube and concrete fillers filled in the steel tube, wherein concrete wrapping layers are poured on the periphery of the steel tube except for plastic hinges of the concrete-filled steel tube composite column, a ductile composite material is poured at the plastic hinges, and the composite material is in seamless joint with the concrete wrapping layers.
Further, the composite material comprises an engineering cement-based composite material.
Furthermore, the periphery of the steel pipe is also provided with reinforcing ribs which are embedded in the concrete wrapping layer and the composite material.
Further, the strengthening rib includes many vertical bars and many stirrups, and many vertical bars distribute along steel pipe circumference, and many stirrups distribute along the steel pipe axial, stirrup and vertical bar fixed connection.
Compared with the prior art, the invention has the following beneficial effects:
the method for repairing the steel pipe concrete composite column is used for repairing the post-earthquake building with smaller earthquake magnitude, and avoids the waste of resources and time and the pollution to the environment caused by the reconstruction aiming at the small earthquake magnitude in the prior art. In the repairing process, the steel pipe concrete composite column is repaired and reinforced by using the composite material with ductility, and the material can greatly improve the anti-seismic performance of the repaired steel pipe concrete composite column.
The method for repairing the steel pipe concrete composite column has simple steps, can effectively improve the repair working efficiency after a small-scale earthquake, saves the heavy and complicated workload of reconstruction, and reduces the dust pollution and excessive waste of materials in the reconstruction work.
Drawings
Fig. 1 is a flowchart of a method for repairing a concrete filled steel tube composite column according to an embodiment of the present invention;
FIG. 2 is a schematic view of a concrete filled steel tube composite column with damaged plastic hinges;
FIG. 3 is a schematic view of the concrete filled steel tube composite column after cleaning the damaged part;
FIG. 4 is a schematic view of a steel pipe concrete composite column in a repaired state;
FIG. 5 is a schematic view of a square section concrete filled steel tube composite column;
FIG. 6 is a schematic view of a concrete filled steel tube composite column with a circular cross section;
in the figure: 1. a steel tube concrete superposed column; 2. longitudinal ribs; 3. a steel pipe; 4. hooping; 5. plastic reaming; 6. A template; 7. a composite material; 8. a support member; 9. and (4) square wood.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
The first embodiment is as follows:
referring to fig. 1, the present invention provides a method for repairing a concrete filled steel tube composite column, which may be used for repairing and reinforcing the concrete filled steel tube composite column shown in fig. 2 after a earthquake, the method comprising:
carrying out damage assessment on the concrete filled steel tube composite column to be repaired, and carrying out the following operation only when the concrete on the outer layer of the plastic hinge of the concrete filled steel tube composite column is damaged
The method comprises the following steps: as shown in figure 3, the damaged concrete on the outer layer of the plastic hinge is cleaned, and the position needing repairing can be clearly exposed when the plastic hinge is cleaned.
Step two: as shown in fig. 4, the cleaned plastic hinges are fixedly supported, and the plastic hinges are fixedly supported by using supporting pieces and auxiliary materials, so that the repairing capability is improved.
Step three: the composite material with ductility is poured at the plastic hinge after supporting, the steel pipe concrete composite column is reinforced and repaired, the composite material comprises engineering cement-based composite material, the ductility of the composite material is stronger than that of common concrete, and the anti-seismic performance of the steel pipe concrete composite column is enhanced when the composite material is poured in the damaged steel pipe concrete composite column.
Specifically, as shown in fig. 2, the concrete damage degree of the outer layer of the plastic hinge 5 of the concrete filled steel tube composite column 1 is divided into: the concrete-filled steel tube composite column has three degrees of cracking, stripping or cracking and stripping, damage to the outer layer of the plastic hinge 5 of the concrete-filled steel tube composite column can be supplemented and repaired by using the composite material 7, wherein the compression peak strain and the ultimate strain of the engineering cement-based composite material in the composite material are 2 times of those of common concrete, and the seismic performance of the repaired concrete-filled steel tube composite column can be effectively improved.
Specifically, the support member 8 includes: a plurality of templates 6 and a plurality of square timber 9, as shown in fig. 3, fig. 4, after the compound post of steel pipe concrete damage clearance, it is fixed to utilize a fender 8 to strut, and a plurality of templates 6 pass through square timber 9 fixed connection, form to enclose and locate the restoration interval of plastic hinge 5 periphery, further fix a plurality of templates 6 and square timber 9 of having strutted through iron nail, iron wire in addition for the complete restoration of compound post of steel pipe concrete is promoted more effectively in the restoration process.
It should be noted that the height of the template 6 for repairing the steel tube concrete composite column is not lower than that of the plastic hinge 5, and the template with the height can effectively and comprehensively support the damaged plastic hinge in the repairing process.
Specifically, the casting thickness of the composite material used in the repairing process can enable the outer diameter of the repaired plastic hinge 5 to be at least flush with the outer diameter of the non-damaged part of the concrete filled steel tube composite column, so that the purpose is to fully repair the damaged concrete filled steel tube composite column by using the composite material and restore the damaged concrete filled steel tube composite column to the shape of the concrete filled steel tube composite column before being damaged by the earthquake.
Example two:
referring to fig. 5 and 6, in the embodiment of the invention, a concrete wrapping layer is poured on the periphery of a steel pipe 3 of the steel pipe-concrete composite column except for a plastic hinge 5 of the steel pipe 3-concrete composite column, a composite material with ductility is coated at the plastic hinge 5, and the composite material is in seamless joint with the concrete wrapping layer, so that the seismic performance of the steel pipe-concrete composite column is effectively improved.
Specifically, the composite material can be an engineering cement-based composite material, the compressive strength of the engineering cement-based composite material is approximately 30-90MPa, the compressive strain is higher than that of common concrete, the bending resistance of the engineering cement-based composite material is also better than that of the common cement-based composite material, and the engineering cement-based composite material has stronger control capability on crack development in the process of repairing the damage of the concrete-filled steel tube composite column.
Specifically, the periphery of the steel tube 3 in the concrete filled steel tube composite column is also provided with reinforcing ribs, and the reinforcing ribs are embedded in the concrete wrapping layer and the composite material and used for enhancing the rigidity and the strength of the concrete filled steel tube composite column and blocking damage caused by an earthquake with a certain magnitude.
According to the embodiment of the invention, the reinforcing rib comprises a plurality of longitudinal ribs 2 and a plurality of stirrups 4, the longitudinal ribs 2 are circumferentially distributed along the steel pipe 3, the stirrups 4 are axially distributed along the steel pipe 3, and the stirrups 4 are fixedly connected with the longitudinal ribs 2, so that the seismic performance of the concrete-filled steel pipe composite column is effectively improved.
The concrete filled steel tube composite column is cut along the direction perpendicular to the longitudinal bars 2, the section of the concrete filled steel tube composite column is square or circular, and concrete filled steel tube composite columns with different section forms are selected according to different scenes.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A method for repairing a concrete filled steel tube composite column, which is characterized by comprising the following steps:
and (3) carrying out damage assessment on the steel pipe concrete composite column to be repaired, and carrying out the following operations only when the concrete on the outer layer of the plastic hinge of the steel pipe concrete composite column is damaged:
cleaning damaged concrete on the outer layer of the plastic hinge;
fixing and supporting the cleaned plastic hinge;
and (3) pouring a ductile composite material at the plastic hinge after supporting, and reinforcing and repairing the concrete-filled steel tube composite column.
2. The method for repairing a concrete filled steel tube composite column according to claim 1, wherein the damage comprises: the plastic hinge outer concrete cracks and/or peels off.
3. The method for repairing a concrete filled steel tube composite column according to claim 1, wherein a support member is used for fixing and supporting, and the support member comprises a plurality of templates and a plurality of square timbers; the plurality of templates are fixedly connected through the square timber to form a repair area which is arranged around the periphery of the plastic hinge.
4. The method for repairing a concrete filled steel tube composite column according to claim 3, wherein the height of the formwork is not lower than the height of the plastic hinge.
5. The method of repairing a steel tube concrete composite column according to claim 1, wherein the composite material comprises an engineering cement-based composite material.
6. The method for repairing a concrete filled steel tube composite column according to claim 1 or 5, wherein the composite material is poured to a thickness at least enabling the outer diameter of the repaired plastic hinge to be flush with the outer diameter of the steel tube concrete composite column where the steel tube concrete composite column is not damaged.
7. The steel tube concrete composite column comprises a steel tube and concrete fillers filled in the steel tube, and is characterized in that concrete wrapping layers are poured on the periphery of the steel tube except plastic hinges of the steel tube concrete composite column, composite materials are poured at the plastic hinges, and the composite materials are in seamless connection with the concrete wrapping layers.
8. The composite concrete filled steel tube column according to claim 7, wherein the composite material comprises an engineered cement based composite material.
9. The concrete-filled steel tube composite column according to claim 7 or 8, wherein reinforcing ribs are further arranged on the periphery of the steel tube, and the reinforcing ribs are embedded in the concrete wrapping layer and the composite material.
10. The concrete-filled steel tube composite column according to claim 9, wherein the reinforcing ribs comprise a plurality of longitudinal ribs and a plurality of stirrups, the plurality of longitudinal ribs are distributed along the circumferential direction of the steel tube, the plurality of stirrups are distributed along the axial direction of the steel tube, and the stirrups are fixedly connected with the longitudinal ribs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110987346.5A CN113700331A (en) | 2021-08-26 | 2021-08-26 | Steel pipe concrete composite column and repairing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110987346.5A CN113700331A (en) | 2021-08-26 | 2021-08-26 | Steel pipe concrete composite column and repairing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113700331A true CN113700331A (en) | 2021-11-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110987346.5A Pending CN113700331A (en) | 2021-08-26 | 2021-08-26 | Steel pipe concrete composite column and repairing method |
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| Country | Link |
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| CN (1) | CN113700331A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012144919A (en) * | 2011-01-13 | 2012-08-02 | Railway Technical Research Institute | Construction method for replacing damaged railway viaduct column |
| CN103306219A (en) * | 2013-06-25 | 2013-09-18 | 福州大学 | Method for quickly repairing and reinforcing post-earthquake damaged pier |
| CN106012809A (en) * | 2016-04-29 | 2016-10-12 | 东南大学 | Steel-fiber composite concrete combination column and post-earthquake repairing method thereof |
| CN106437189A (en) * | 2016-09-12 | 2017-02-22 | 上海市建筑科学研究院 | Method of reinforcing and restoring earthquake-damaged reinforced concrete frame |
| CN108396663A (en) * | 2018-04-11 | 2018-08-14 | 天津大学 | Bridge pier prosthetic device based on light-duty prestressing force stainless steel sheath and restorative procedure |
-
2021
- 2021-08-26 CN CN202110987346.5A patent/CN113700331A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012144919A (en) * | 2011-01-13 | 2012-08-02 | Railway Technical Research Institute | Construction method for replacing damaged railway viaduct column |
| CN103306219A (en) * | 2013-06-25 | 2013-09-18 | 福州大学 | Method for quickly repairing and reinforcing post-earthquake damaged pier |
| CN106012809A (en) * | 2016-04-29 | 2016-10-12 | 东南大学 | Steel-fiber composite concrete combination column and post-earthquake repairing method thereof |
| CN106437189A (en) * | 2016-09-12 | 2017-02-22 | 上海市建筑科学研究院 | Method of reinforcing and restoring earthquake-damaged reinforced concrete frame |
| CN108396663A (en) * | 2018-04-11 | 2018-08-14 | 天津大学 | Bridge pier prosthetic device based on light-duty prestressing force stainless steel sheath and restorative procedure |
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Application publication date: 20211126 |