CN107355008B - Prefabricated connection structure and method for newly added concrete filled steel tubular column and existing structure - Google Patents

Prefabricated connection structure and method for newly added concrete filled steel tubular column and existing structure Download PDF

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Publication number
CN107355008B
CN107355008B CN201710780007.3A CN201710780007A CN107355008B CN 107355008 B CN107355008 B CN 107355008B CN 201710780007 A CN201710780007 A CN 201710780007A CN 107355008 B CN107355008 B CN 107355008B
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stiffening
newly added
column
plate
prefabricated
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CN107355008A (en
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龙建文
庄妍
周裕利
钟永国
陈达
周泽佳
吴奕武
郭晓兰
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Guangzhou Construction Industry Development Co ltd
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Guangzhou Construction Industry Development Co ltd
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/38Connections for building structures in general
    • E04B1/58Connections for building structures in general of bar-shaped building elements
    • E04B1/5825Connections for building structures in general of bar-shaped building elements with a closed cross-section
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00Working measures on existing buildings
    • E04G23/02Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
    • E04G23/0218Increasing or restoring the load-bearing capacity of building construction elements

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Working Measures On Existing Buildindgs (AREA)

Abstract

The invention discloses a prefabricated connecting structure and a method for a newly added steel tube concrete column and an existing structure, wherein the prefabricated connecting structure comprises two stiffening base plates which are arranged in parallel and a connecting plate which is connected with the stiffening base plates, and the stiffening base plates are provided with a plurality of connecting holes; the connecting holes are internally provided with split bolts, the split bolts penetrate through all stiffening base plates arranged in parallel, and two ends of the split bolts are connected with the stiffening base plates through nuts; the two ends of the split bolt extend outwards to form a connecting end by the stiffening base plate; and pouring holes are further formed in the stiffening base plate. The steel pipe column and the connecting structure can be prefabricated in factories, so that the construction efficiency is improved, and the construction period is shortened. According to the invention, the bolt hole is formed in the steel pipe column in advance, and the bolt connection is adopted, so that the field welding operation is reduced, and the construction is convenient. When concrete is poured, vertical steel bars can be added at the plate holes, so that the connection between the lower layer column and the upper layer column can be enhanced; the construction quality is ensured.

Description

Prefabricated connection structure and method for newly added concrete filled steel tubular column and existing structure
Technical Field
The invention belongs to the technical field of building construction, and particularly relates to a prefabricated connecting structure and method for a newly-added steel tube concrete column and an existing structure.
Background
The method is basically the same as the common construction, the reinforced bar is drilled on the beam of the original building to be used as the stressed reinforced bar of the newly-added column, and then the template is used for pouring concrete, so that the construction of the newly-added structural column is completed after the template is maintained and removed.
The connection of the concrete filled steel tubular column and the structure mainly refers to the connection of the concrete filled steel tubular column and the beam. At present, the connection of the steel tube concrete column and the beam mainly forms a connection section by arranging a ring beam at the upper end of the column, and the ring beam connection section is required to be provided with more steel bars or adopts steel bones to connect the steel tube concrete beam and the steel tube concrete column, so that the structure is combined and integrally stressed. At present, no connection technology for a newly added steel tube concrete column and an existing structure is searched, and no prefabricated connection technology exists.
1. The reinforcing mode of the newly added structural column by adopting cast-in-situ reinforced concrete has the following defects:
(1) The method needs to detect the strength of the planted bars, increases the process and the construction period, and increases the detection cost. The steel bars implanted on the original building beam are required to be detected whether to have enough bonding strength, if the bonding strength is insufficient, the steel bars cannot be used as the stressed bars of the newly added column, and the next construction cannot be carried out without detection.
(2) The process needs to support templates and tie steel bars, is complex, has small construction space, increases construction difficulty and is easy to increase construction period. Compared with the construction of the steel pipe concrete column, the cast-in-situ reinforced concrete column needs to support templates and bind reinforcing steel bars, and the process increases labor and time cost more. Compared with a newly-built building in the existing building reinforcement project, the construction space is small, the construction difficulty is increased due to the fact that the construction is not facilitated, and the construction period is easy to influence.
(3) The technology does not realize prefabrication, often does not meet the requirements of the planned construction period, and affects the continuous use of building functions. The newly added structural column reinforcement engineering is more common in single-span teaching buildings, the planning period is required to be completed in summer holidays 60, but because the concrete reaches the design strength for 28 days, and the newly-made foundation maintenance and detection, steel bar binding, formwork supporting, form removing, later decoration and other processes take more time, the reinforcement work can not be completed in the planning period, and the normal use of the teaching building is affected.
(4) The quality and effect of the technology are poor. The newly added cast-in-situ reinforced concrete column is generally grouted at the column top template opening of the layer of column, and because the construction space is limited by the floor slab, the casting construction surface is arranged above the manual and mechanical parts, grouting is needed to be looked up, the grouting opening is not easy to seal, and the newly added reinforced concrete column has poor quality due to easy die running.
2. The connection technology of the steel tube concrete column and the reinforced concrete beam is common at present:
(1) The beam is suitable for new construction, and if the beam is used in the existing structure, the beam of the original structure is required to be dismantled, so that the integrity of the original structure is damaged.
(2) The technology is actually that the column is interrupted by the through beam, the interrupted beams are connected by the ring beam, but the ring beam has more reinforcing steel bars and complex reinforcing steel bar binding.
Disclosure of Invention
The invention provides a prefabricated connecting structure and a prefabricated connecting method for a newly added concrete filled steel tube column and an existing structure, which aims to solve the technical problems of small space, difficult construction, low construction efficiency and long construction period of the newly added concrete filled steel tube column in the existing building, and the prefabricated connecting structure and the prefabricated connecting method have high prefabricated construction quality and high construction efficiency.
In order to solve the problems, the invention is realized according to the following technical scheme:
the prefabricated connecting structure of the newly added steel tube concrete column and the existing structure comprises two stiffening base plates arranged in parallel and a connecting plate for connecting the stiffening base plates, wherein a plurality of connecting holes are formed in the stiffening base plates; the connecting holes are internally provided with split bolts, the split bolts penetrate through all stiffening base plates arranged in parallel, and two ends of the split bolts are connected with the stiffening base plates through nuts; the two ends of the split bolt extend outwards to form a connecting end by the stiffening base plate;
and pouring holes are further formed in the stiffening base plate.
Further, the upper surface of the stiffening backing plate arranged at the upper end is extended with a vertical baffle plate, the vertical baffle plate is perpendicular to the stiffening backing plate, and the vertical baffle plate is connected end to end along the periphery of the stiffening backing plate to form a square cavity.
Further, a plurality of first through holes are formed in the connecting plate.
Further, the connecting hole is a kidney-shaped hole.
Further, the stiffening backing plate is provided with a second through hole corresponding to the floor slab hole.
Further, the pouring holes are arranged at two corner positions of the stiffening backing plate, so that the stiffening backing plate forms a T-shaped structure.
Further, the connection device can be customized on site, prefabricated in all factories or manufactured on site.
A prefabrication connection method for a newly added steel pipe concrete column and an existing structure comprises the following steps:
s1, arranging stiffening base plates at the positions, where the cantilever beams and the end beams are intersected, of a floor slab to be reinforced, wherein the stiffening base plates are arranged on the upper surface and the lower surface of the floor slab, and holes are drilled on the end surfaces of the cantilever beams so that a connecting plate penetrates through the floor slab to connect the two stiffening base plates; the stiffening backing plate is provided with a plurality of connecting holes and pouring holes;
s2, drilling the existing building through the connecting hole, and drilling a pouring hole of the existing building through the pouring hole;
s3, penetrating the split bolt through the stiffening base plate and the existing building, and sleeving nuts at two ends of the split bolt for locking;
s4, arranging a steel pipe column at the lower end of a stiffening backing plate arranged on the bottom surface of the floor slab, and performing welding and seam repairing treatment on the steel pipe column and the stiffening backing plate arranged at the bottom end through seams;
s5, pouring concrete to the height of the stiffening backing plate arranged at the upper end through the pouring holes, and completing the construction of a newly-added steel tube concrete column.
Further, before the step S1, the geometric dimension of the newly added column node is measured on site, node modeling is carried out according to a design drawing and site reality, the dimension of the newly added steel tube concrete column and the dimension of a corresponding prefabricated connecting structure are determined according to modeling and calculation, and a stiffening base plate is prefabricated.
Further, in the step S1, a vertical baffle extends out of the upper surface of the stiffening backing plate arranged at the upper end, the vertical baffle is perpendicular to the stiffening backing plate, the vertical baffle is connected end to end along the periphery of the stiffening backing plate to form a square cavity, and the concrete is poured to the height of the vertical baffle.
Further, before the step S1, the method further comprises the steps of cleaning accessory parts of the original building, leaving corresponding working surfaces, and then chiseling and cleaning newly added column node parts.
Compared with the prior art, the invention has the beneficial effects that:
the steel pipe column and the connecting structure can be prefabricated in factories, so that the construction efficiency is improved, and the construction period is shortened. And the template is not required to be assembled and disassembled, so that the construction cost is saved. The steel pipe column is provided with a bolt hole in advance, and the steel pipe column is connected by bolts, so that the field welding operation is reduced, and the construction is convenient. When concrete is poured, vertical steel bars can be added at the plate holes, so that the connection between the lower layer column and the upper layer column can be enhanced; the construction quality is ensured.
Drawings
The invention is described in further detail below with reference to the attached drawing figures, wherein:
FIG. 1 is a schematic structural view of a prefabricated connecting structure of a newly added concrete filled steel tubular column and an existing structure;
FIG. 2 is a front view of a prefabricated connecting structure of the newly added concrete filled steel tubular column and the existing structure according to the present invention;
FIG. 3 is a top view of a prefabricated connecting structure of the newly added concrete filled steel tubular column and the existing structure according to the present invention;
FIG. 4 is a construction schematic of a prefabricated connecting structure of the newly added concrete filled steel tubular column and the existing structure;
FIG. 5 is a schematic view of the installation of a prefabricated connecting structure of a newly added steel pipe concrete column and an existing structure and a steel pipe column according to the present invention.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present invention only, and are not intended to limit the present invention.
As shown in fig. 1 to 5, the prefabricated connecting structure of the newly added steel tube concrete column and the existing structure comprises two first stiffening base plates 1, second stiffening base plates 2 and connecting plates 4 for connecting the first stiffening base plates 1 and the second stiffening base plates 2, wherein the first stiffening base plates 1 and the second stiffening base plates 2 are stiffening base plates with the same shape, structure and size, and a plurality of connecting holes 6 are formed in the stiffening base plates; in this embodiment, the connection hole 6 is a kidney-shaped hole.
A split bolt 5 is arranged in the connecting hole 6, the split bolt 5 penetrates through the first stiffening base plate 1 and the second stiffening base plate 2 which are arranged in parallel, and two ends of the split bolt 5 are connected with the stiffening base plate through nuts 51; the two ends of the split bolt 5 extend outwards to form a connecting end by the stiffening base plate, and the stiffening base plate can be embedded in the newly added steel tube concrete column to increase the connection stability. And the stiffening backing plate is provided with pouring holes 7 corresponding to the holes of the floor slab. The pouring holes 7 are arranged at two corner positions of the stiffening base plate, so that the stiffening base plate forms a T-shaped structure.
The upper surface of first stiffening backing plate 1 stretches out has vertical baffle 3, vertical baffle 3 with first stiffening backing plate 1 sets up perpendicularly, vertical baffle 3 is followed first stiffening backing plate 1's all around end to end encloses into a square cavity.
The connecting plate 4 is provided with a plurality of first through holes 41. The first stiffening base plate 1 and the second stiffening base plate 2 are provided with the second through holes 11, so that the weight of the stiffening base plate and the connecting plate 4 is reduced, and materials are saved.
The first stiffening backing plate 1 and the vertical baffle 3 are slightly larger than the steel pipe column 8, so that the steel pipe column 8 is directly inserted into a cavity surrounded by the vertical baffle 3, and the positioning of the upper layer steel pipe column 8 is facilitated. The split bolt 5 is in a vertical strip shape, the bonding of the split bolt 5 and concrete can be increased by adopting a mode of bending the end part or adding an anchor plate anchor bolt on the end part, and the vertical integral connection of the steel tube concrete column is enhanced. The connecting plate between the first stiffening base plate and the second stiffening base plate can be replaced by an energy consumption plate, and is equal to a common steel plate under the condition of no earthquake, and energy consumption and shock absorption are preferentially carried out under the action of the earthquake, so that the earthquake damage mainly occurs at the newly added steel tube concrete column, and the damage to the original structure is reduced. If the newly added structural column is at the inner side of the structure, the structure can be omitted when the vertical connecting plate cannot be installed.
A prefabrication connection method for a newly added steel pipe concrete column and an existing structure comprises the following steps:
s1, measuring the geometric dimension of a newly-added column node on site, carrying out node modeling according to a design drawing and site reality, determining the dimension of the newly-added concrete filled steel tube column and the dimension of a corresponding prefabricated connecting structure according to modeling and calculation, and prefabricating a stiffening base plate. And a vertical baffle plate 3 is arranged on the upper surface of the first stiffening backing plate.
S2, removing the accessory parts of the original building 92, and after leaving the corresponding working surface, chiseling and cleaning the newly added column node parts.
S3, a stiffening base plate is arranged at the position where the cantilever beam 9 and the end beam 91 intersect, which is positioned on the floor to be reinforced, the first stiffening base plate 1 is arranged on the upper surface of the floor, the second stiffening base plate 2 is arranged on the lower surface of the floor, and holes are drilled on the end face of the cantilever beam 9 so that a connecting plate penetrates through the floor to connect the first stiffening base plate 1 and the second stiffening base plate 2.
S4, drilling the existing building through the connecting hole 6, and drilling the pouring hole of the existing building through the pouring hole 7.
And S5, penetrating the split bolt through the stiffening base plate and the existing building, and sleeving nuts at two ends of the split bolt for locking.
S6, arranging a steel pipe column 8 at the lower end of the second stiffening backing plate 2 arranged on the bottom surface of the floor slab, and performing welding and seam repairing treatment on the steel pipe column 8 and the second stiffening backing plate 2 through seams.
And S7, pouring concrete to the height of the vertical baffle 3 through the pouring holes, and completing the construction of a newly-added steel tube concrete column.
The invention adopts a smart structure and can prefabricate a connecting structure, so that a constructor can construct according to the construction steps, the invention is suitable for the standardized process in the reinforcement of the existing building with small space, the quality is ensured, the construction efficiency is high, and the construction period is ensured to be completed on time.
The present invention is not limited to the preferred embodiments, and any modifications, equivalent variations and modifications made to the above embodiments according to the technical principles of the present invention are within the scope of the technical proposal of the present invention.

Claims (10)

1. A prefabricated connection structure of newly-increased steel core concrete column and existing structure, its characterized in that: the device comprises two stiffening base plates arranged in parallel and a connecting plate for connecting the stiffening base plates, wherein a plurality of connecting holes are formed in the stiffening base plates; the connecting holes are internally provided with split bolts, the split bolts penetrate through all stiffening base plates arranged in parallel, and two ends of the split bolts are connected with the stiffening base plates through nuts; the two ends of the split bolt extend outwards to form a connecting end by the stiffening base plate; the end part of the connecting end of the split bolt is bent or an anchor plate anchor bolt is added at the end part;
and pouring holes are further formed in the stiffening base plate.
2. The prefabricated connecting structure of the newly added steel tube concrete column and the existing structure according to claim 1, which is characterized in that: the upper surface of the stiffening backing plate arranged at the upper end is extended with a vertical baffle plate, the vertical baffle plate is vertically arranged with the stiffening backing plate, and the vertical baffle plate is connected end to end along the periphery of the stiffening backing plate to form a square cavity.
3. The prefabricated connecting structure of the newly added steel tube concrete column and the existing structure according to claim 2, which is characterized in that: the connecting plate is provided with a plurality of first through holes.
4. A prefabricated connection structure of a newly added concrete filled steel tubular column and an existing structure according to any one of claims 1 to 3, characterized in that: the connecting hole is a kidney-shaped hole.
5. The prefabricated connecting structure of the newly added steel tube concrete column and the existing structure according to claim 4, which is characterized in that: and the stiffening backing plate is provided with a second through hole corresponding to the floor slab hole.
6. The prefabricated connecting structure of the newly added steel tube concrete column and the existing structure according to claim 4, which is characterized in that: the pouring holes are arranged at two corner positions of the stiffening base plate, so that the stiffening base plate forms a T-shaped structure.
7. A prefabrication connection method for a newly added steel pipe concrete column and an existing structure is characterized by comprising the following steps of: the method comprises the following steps:
s1, arranging stiffening base plates at the positions, where the cantilever beams and the end beams are intersected, of a floor slab to be reinforced, wherein the stiffening base plates are arranged on the upper surface and the lower surface of the floor slab, and holes are drilled on the end surfaces of the cantilever beams so that a connecting plate penetrates through the floor slab to connect the two stiffening base plates; the stiffening backing plate is provided with a plurality of connecting holes and pouring holes;
s2, drilling the existing building through the connecting hole, and drilling a pouring hole of the existing building through the pouring hole;
s3, penetrating the split bolt through the stiffening base plate and the existing building, and sleeving nuts at two ends of the split bolt for locking;
s4, arranging a steel pipe column at the lower end of a stiffening backing plate arranged on the bottom surface of the floor slab, and performing welding and seam repairing treatment on the steel pipe column and the stiffening backing plate arranged at the bottom end through seams;
s5, pouring concrete to the height of the stiffening backing plate arranged at the upper end through the pouring holes, and completing the construction of a newly-added steel tube concrete column.
8. The prefabricated connecting method of the newly added steel tube concrete column and the existing structure according to claim 7, which is characterized in that: before S1, the geometric dimension of the newly added column node is measured on site, node modeling is carried out according to a design drawing and site reality, the dimension of the newly added steel pipe concrete column and the dimension of a corresponding prefabricated connecting structure are determined according to modeling and calculation, and a stiffening base plate is prefabricated.
9. The prefabricated connecting method of the newly added steel tube concrete column and the existing structure according to claim 7, which is characterized in that: in S1, the upper surface of the stiffening backing plate arranged at the upper end stretches out to have a vertical baffle, the vertical baffle with the stiffening backing plate sets up perpendicularly, the vertical baffle is followed the end to end all around of stiffening backing plate encloses into a square cavity, concrete placement extremely the height of vertical baffle.
10. The prefabricated connecting method of the newly added steel tube concrete column and the existing structure according to claim 8, which is characterized in that: before S1, the method further comprises the steps of removing accessory parts of the original building, and after a corresponding working surface is reserved, chiseling and cleaning the newly added column node parts.
CN201710780007.3A 2017-09-01 2017-09-01 Prefabricated connection structure and method for newly added concrete filled steel tubular column and existing structure Active CN107355008B (en)

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CN109235640B (en) * 2018-06-05 2023-10-27 北京交通大学 Pin type connecting structure between modularized steel structural members for building
CN110984477A (en) * 2019-06-28 2020-04-10 王海崴 Straight groove-shaped component connected by assembly type construction steel bars
CN110725562B (en) * 2019-10-24 2021-05-11 杭州市建筑设计研究院有限公司 Floor separation reinforcing method suitable for reinforcing large-load data room
CN111719888B (en) * 2020-07-11 2021-10-22 江苏筑镹营造科技有限公司 Method for additionally arranging ring beam and constructional column in existing masonry building body

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CN207144180U (en) * 2017-09-01 2018-03-27 广州市建筑科学研究院新技术开发中心有限公司 A kind of prefabricated attachment structure of newly-increased steel core concrete column and existing structure

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Publication number Priority date Publication date Assignee Title
JP2003013614A (en) * 2001-04-26 2003-01-15 Ohmoto Gumi Co Ltd Seismic strengthening method for existing building, and brace mounting apparatus for use therein
CN202324203U (en) * 2011-11-17 2012-07-11 辽宁省建筑设计研究院 Connecting node structure for existing concrete column and new steel column
CN103334499A (en) * 2013-07-08 2013-10-02 山东中通钢构建筑股份有限公司 Beam column node connection device
CN104847052A (en) * 2015-04-29 2015-08-19 华侨大学 Earthquake damage replaceable combination column structure
CN104947802A (en) * 2015-06-15 2015-09-30 山东建筑大学 Node for connecting concrete-filled steel tube column and external wrapping U-shaped steel concrete composite beam
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