CN110630032A - Node connecting device for newly adding beam on existing reinforced concrete column beam - Google Patents
Node connecting device for newly adding beam on existing reinforced concrete column beam Download PDFInfo
- Publication number
- CN110630032A CN110630032A CN201911011073.XA CN201911011073A CN110630032A CN 110630032 A CN110630032 A CN 110630032A CN 201911011073 A CN201911011073 A CN 201911011073A CN 110630032 A CN110630032 A CN 110630032A
- Authority
- CN
- China
- Prior art keywords
- reinforced concrete
- connecting device
- hoop
- existing
- existing reinforced
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000011150 reinforced concrete Substances 0.000 title claims abstract description 76
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 77
- 239000010959 steel Substances 0.000 claims abstract description 77
- 239000004567 concrete Substances 0.000 claims abstract description 47
- 238000004873 anchoring Methods 0.000 claims abstract description 31
- 230000002093 peripheral effect Effects 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 17
- 238000003466 welding Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 6
- 239000011241 protective layer Substances 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 5
- 230000002829 reductive effect Effects 0.000 abstract description 4
- 238000005452 bending Methods 0.000 abstract description 3
- 230000002787 reinforcement Effects 0.000 abstract description 3
- 230000003313 weakening effect Effects 0.000 abstract description 3
- 238000010008 shearing Methods 0.000 description 4
- 239000010410 layer Substances 0.000 description 3
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 240000002834 Paulownia tomentosa Species 0.000 description 1
- 235000010678 Paulownia tomentosa Nutrition 0.000 description 1
- 235000021167 banquet Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 210000002837 heart atrium Anatomy 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
- E04B1/21—Connections specially adapted therefor
- E04B1/215—Connections specially adapted therefor comprising metallic plates or parts
-
- 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
- E04G23/0266—Enlarging
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Joining Of Building Structures In Genera (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention discloses a node connecting device for adding a beam on an existing reinforced concrete column beam, and belongs to the technical field of building reinforcement. The device comprises a hoop surrounding the periphery of an existing reinforced concrete column or a concrete beam, a horizontal connecting device and a vertical connecting device fixedly connected with the hoop, an anchoring rib and a newly-added beam supporting structure fixedly connected with the horizontal connecting device and the vertical connecting device. The hoop is provided with a plurality of through holes, and the anchoring ribs penetrate through the through holes to be fixed with the existing reinforced concrete columns or concrete beams. The outer surface of the hoop is not higher than the outer surface of the existing reinforced concrete column or concrete beam, and the hoop is fixed along the outer peripheral surface of the existing reinforced concrete column or concrete beam to form a whole. The device has reduced the node connection construction degree of difficulty of newly-increased reinforced concrete beam and existing frame post through taking simple steel corbel connection structure, has reduced the cross-section weakening to existing frame post, has improved bending resistance, the bearing capacity that shears in node region, has guaranteed that newly-increased reinforced concrete beam and existing frame post can the collaborative work well.
Description
Technical Field
The invention relates to a node connecting device for adding a beam on an existing reinforced concrete column beam, and belongs to the technical field of building reinforcement.
Background
As the using time of the building is prolonged, the building can be damaged artificially or naturally, the structural strength of the building is weakened, and the building can even collapse in severe cases. In addition, when the whole or partial functions of the building are changed, some load-bearing structures are probably required to be added. For example, in order to increase the business or use area, the original atrium structure penetrating through multiple floors is eliminated, and a plurality of closed floors are constructed. Therefore, in the use process of the building, not only the structure of the building itself needs to be reinforced, but also a new supporting and bearing structure between the existing reinforced concrete columns or reinforced concrete beams is often needed.
At present, in the existing building structure reconstruction project, a reinforcing mode of a frame beam (or cantilever beam) is additionally arranged on an original reinforced concrete frame column, and the conventional method is that longitudinal stress steel bars of the newly-added frame beam (or cantilever beam) are directly implanted into the column by adopting a chemical bar planting method at corresponding positions on the original frame column. When the traditional method is used for carrying out newly-added beam rooting treatment, three problems are often encountered in the construction process: first, when the longitudinal steel bars of the newly added beam are configured more, the minimum distance (S) of the embedded bars is within the range of the embedded barsminNot less than 5d), which affects the anchoring effect of the embedded steel bar; secondly, when the newly added beam longitudinal steel bars are configured in a large number, the drilled holes are too concentrated in the steel bar planting range, the weakening of the cross section of the original frame column is large, and the structural safety of the original frame column is influenced; thirdly, when the diameter of the longitudinal steel bar of the newly added beam is large, the cross section size of the original frame column cannot meet the minimum steel bar planting anchoring depth required by theoretical calculation, and in addition, the steel bar planting depth is too deep, so that great difficulty is caused to the construction of the steel bar planting.
Disclosure of Invention
In order to solve the technical problems that the embedded bar spacing can not meet the technical specification requirement and the embedded bar drilling holes are concentrated in the process of adding the beam to the existing reinforced concrete column or concrete beam, the section of the existing concrete column or concrete beam is weakened too much, the safety degree of the existing structure is reduced, and the embedding depth of the longitudinal steel bar of the newly added beam can not meet the requirement in the prior art, the invention provides a node connecting device for adding the beam to the existing reinforced concrete column beam, and the technical scheme is as follows:
a node connecting device for adding beams on an existing reinforced concrete column beam comprises a hoop 1 nested and enclosed at the periphery of the joint of the existing reinforced concrete column or concrete beam, a horizontal connecting device 2 and a vertical connecting device 3 fixedly connected with the hoop 1, an anchoring rib 5 and a newly added beam supporting structure fixedly connected with the horizontal connecting device 2 and the vertical connecting device 3; the hoop 1 is provided with a plurality of through holes, and the anchoring ribs 5 penetrate through the through holes to be fixed with the existing reinforced concrete columns or concrete beams; the hoop 1 is fixed along the peripheral surface of the existing reinforced concrete column or concrete beam to form a whole.
Preferably, the horizontal connecting means 2 comprises a plurality of horizontally arranged top plates 21 and bottom plates 22; the top plates 21 are positioned on the same horizontal plane, and the edges of the top plates are welded and fixed to form a ring-shaped structure.
More preferably, the vertical connecting device 3 is located between the top plate 21 and the bottom plate 22, and the vertical connecting device 3 comprises a main vertical plate 31 welded and fixed with the lower surface of the top plate 21 and the upper surface of the bottom plate 22, and side vertical plates 32 located at both sides of the main vertical plate 31 and fixedly connected with at least the lower surface of the top plate 21.
More preferably, the additional beam support structure is a longitudinal reinforcing bar means 4 fixedly connected to the upper surface of the top plate 21, the lower surface of the bottom plate 22, and the side surfaces of the main and side hang plates 31 and 32.
Preferably, the vertical connecting device 3 comprises an outrigger 6 between the top plate 21 and the bottom plate 22; the cantilever beam 61 comprises an I-shaped steel beam and a main vertical plate 31; the main vertical plate 31 is fixedly welded with the outer side surface of the hoop sleeve 1; the upper surface of the I-shaped steel beam is welded and fixed with the lower surface of the top plate 21, and the lower surface of the I-shaped steel beam is welded and fixed with the upper surface of the bottom plate 22.
More preferably, a plurality of through holes are correspondingly formed on the vertical surface of the i-shaped steel beam and the main hanging plate 31, and the i-shaped steel beam and the main hanging plate 31 are fixedly connected by a fixing device 61 penetrating through the through holes.
More preferably, the anchoring rib 5 is implanted and anchored on the existing reinforced concrete column or concrete beam through holes uniformly arranged on the hoop 1; or the steel bar is welded and fixed with the steel bar in the existing reinforced concrete column or concrete beam through the through hole arranged on the hoop 1.
Preferably, the outer surface of the ferrule 1 is not higher than the outer surface of the existing reinforced concrete column.
Preferably, a high-strength non-shrinkage concrete grouting material layer for bonding is arranged between the hoop 1 and the existing reinforced concrete column or concrete beam.
More preferably, the ferrule 1 is a metal ferrule; further, the ferrule 1 is a steel ferrule, and the thickness is not less than 10 mm.
Another object of the present invention is to provide a method for constructing a new reinforced concrete beam using any one of the above node connection devices, the method comprising the steps of:
1) removing four concrete protective layers at the position of an existing reinforced concrete column where a reinforced concrete beam or cantilever beam needs to be newly added, and exposing longitudinal bars and stirrups of the existing column;
2) calculating the number and diameter of anchoring ribs to be implanted at the newly added reinforced concrete beam, and implanting the anchoring ribs by adopting a chemical bar-planting method according to the calculation result;
3) installing the steel hoop sleeve provided with the through holes corresponding to the anchoring ribs in the step (2) at the newly added reinforced concrete beam, welding and fixing the adjacent hoop sleeve plates into a whole, and then welding and fixing each anchoring rib and the steel hoop sleeve;
4) welding a horizontal connecting device and a vertical connecting device on the outer side of the steel hoop sleeve;
5) welding longitudinal steel bars of the newly-added reinforced concrete columns on the horizontal connecting device and the vertical connecting device in the step (4), and fixing the longitudinal steel bars by using stirrups;
6) filling and compacting a gap between the steel ferrule and the existing column by adopting high-strength non-shrinkage concrete grouting material;
7) and pouring the concrete of the newly added beam.
Preferably, the thickness of the steel ferrule is not less than 10 mm.
Compared with the prior art, the invention has the following beneficial effects:
the node connecting device provided by the invention adopts a simple steel corbel connecting structure, reduces the difficulty of connecting and constructing the nodes of the newly-added reinforced concrete beam and the existing frame column, reduces the weakening of the cross section of the existing frame column, improves the bending resistance and shearing resistance bearing capacity of the node area, and ensures that the newly-added reinforced concrete beam and the existing frame column can work well in a cooperative manner.
The joint connecting device provided by the invention is creatively matched and fixed with a plurality of anchoring ribs which are implanted into a concrete column to play a role in fixing through the through holes uniformly distributed on the hoop plate, and meanwhile, the connecting strength and stability of the hoop and the existing concrete column beam are greatly increased by embedding the newly-added hoop into the existing concrete column by removing the outer concrete protective layer of the existing reinforced concrete column or concrete beam, and the shearing resistance and the bearing capacity of the newly-added beam are effectively increased.
The node connecting device provided by the invention connects the steel bars of the newly added beam to the extending connecting device through the steel bracket type extending connecting device, thereby avoiding the limitation of the steel bars in the existing concrete column or concrete beam to the positions, the quantity, the diameters and other aspects of the newly added steel bars, and being capable of randomly setting the positions of the steel bars under the condition of meeting the technical specification requirements according to the specific requirements.
Meanwhile, the node connecting device forms an annular integral stress structure connected with the newly-added beam in the circumferential direction of the hoop, so that the pulling effect of the newly-added beam on the newly-added surface can be effectively reduced, and the gravity and the shearing force of the newly-added beam are effectively dispersed.
Drawings
Fig. 1 is a perspective view of a node connecting device according to a preferred embodiment of the present invention.
Fig. 2 is a schematic top view of the structure of fig. 1.
Fig. 3 is a schematic sectional view along a-a of fig. 2.
Fig. 4 is a schematic sectional view along the direction B-B in fig. 2.
Fig. 5 is a schematic sectional view along the direction B '-B' of fig. 2.
Fig. 6 is a schematic perspective view of a node connecting device according to a preferred embodiment of the present invention.
Fig. 7 is a schematic perspective view of the connection of the node connecting device between two beams.
Fig. 8 is a schematic perspective view of the installed node connection device between two beams.
Fig. 9 is a perspective view of a node connecting device according to a preferred embodiment of the present invention.
Wherein, 1, a cuff; 2, a horizontal connecting device; 3, a vertical connecting device; 4, a longitudinal extension device; 5, anchoring ribs; 6, cantilever beam; 21, a top plate; 22, a bottom plate; 31, a main droop panel; 32, a side hang plate; 41, longitudinal ribs; 42, stirrup; 61, a fixing device; KZ1, existing column; KL1, existing beam; KL2, newly added beam.
Detailed Description
In the following description of the present invention, it is to be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and "upright", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the following description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; the connection may be direct or indirect via an intermediate medium, or the connection may be internal to both components. To those of ordinary skill in the art, the specific meaning of the above-described terms in the present invention can be understood as a specific case.
In addition, in the following description of the present invention, the meaning of "plurality", and "plural" is two or more unless otherwise specified.
The materials, reagents, devices, apparatuses, methods and processes used in the following examples are not specifically described, and are all materials, reagents, devices, apparatuses, methods and processes which are common in the art, and are commercially available to those skilled in the art or can be routinely set up according to specific needs without any creative effort.
In the following embodiments, the chemical anchoring connecting steel bar (i.e. anchoring bar) additionally arranged between the steel ferrule and the original frame column should adopt an HRB 335-grade or an HRB 400-grade ribbed steel bar, or adopt a Q235 or Q345-grade steel screw, the strength index of the chemical anchoring connecting steel bar should meet the specification of the existing national standard, namely the concrete structure design specification (GB50010-2002), the diameter of the anchoring bar should be determined by calculation, generally should not be less than 12 mm, and should not be more than 16 mm, and the construction difficulty of bar planting is increased if the diameter is too large;
meanwhile, in order to increase the out-of-plane rigidity of the steel ferrule combined steel plate and prevent the steel plate from generating out-of-plane bending deformation to cause cracks on the beam-column connection node, the thickness of the steel plate is guaranteed to be not less than 10mm, butt welds among all the steel plates are required to be completely welded to improve the safety degree of node connection, the quality grade of the welds is required to be one grade when being pulled, and the quality grade of the welds is required to be two grades when being pressed.
The present invention will be further described with reference to the following specific examples, but the present invention is not limited to these examples.
Example 1
Figures 1-5 provide a node connecting device for adding reinforced concrete beams to existing reinforced concrete columns. Specifically, fig. 1 is a schematic perspective view of the node connection device in this embodiment. Fig. 2 is a schematic top view of the structure of fig. 1. Fig. 3 is a schematic sectional view along a-a of fig. 2. Fig. 4 is a schematic sectional view along the direction B-B in fig. 2. Fig. 5 is a schematic sectional view along the direction B '-B' of fig. 2. Wherein, for the convenience of observation and demonstration, the feature of the existing reinforced concrete column at the joint connecting device is weak so that the joint connecting device can be embedded into the concrete column is not shown in figure 1.
As can be seen from fig. 1 to 5, the node connecting device is a node connecting device of reinforced concrete beams in four directions additionally arranged on a square reinforced concrete column KZ 1. The node connecting device comprises four steel hoops 1, a horizontal connecting device 2, a vertical connecting device 3, a longitudinal extending device 4 and a plurality of anchoring ribs 5 which are nested and enclosed on the existing reinforced concrete column with a peeled outer concrete protective layer. Wherein, four steel cuffs 1 are welded and fixed into a whole, and round through holes are distributed on each steel cuff 1 in a rectangular array (as shown in figures 3-5). The anchoring rib 5 penetrates through the circular through hole and is implanted into the existing reinforced concrete column, and the anchoring rib 5 is used for fixing the steel ferrule 1. Meanwhile, the concrete protective outer layer of the existing reinforced concrete column at the connecting part needs to be peeled off before installation, and the peeling depth is not less than the thickness of the steel ferrule 1, so that the concrete protective outer layer which is not peeled off has a certain supporting function on the steel ferrule 1.
A connecting structure consisting of a horizontal connecting device 2 and a vertical connecting device 3 in a bracket leg mode is arranged on the outer side surface of the steel ferrule 1. The horizontal connecting device 2 is divided into a top plate 21 and a bottom plate 22, and the top plate 21 and the bottom plate 22 are four pieces each. The top plate 21 is of an isosceles trapezoid structure, and the edges of the four top plates 21 on the same horizontal plane are welded into a whole, so that the four top plates 21 form an integrated annular structure, and the shearing force capability of each side surface for resisting the newly-added concrete beam is improved. A main hanging plate 31 is welded and fixed to the lower surface of the top plate 21 and the middle portion of the upper surface of the bottom plate 22, and two side hanging plates 32 are respectively provided on both sides of the main hanging plate 31. Of these, three side depending panels 32 are connected only to the lower surface of the top panel 21, and the other side depending panel 32 is connected to both the lower surface of the top panel 21 and the upper surface of the bottom panel 22 (as shown in figures 3-5).
The longitudinal extension device 4 is welded and fixed on the upper surface of the top plate 21 and the lower surface of the bottom plate 22, and meanwhile, the longitudinal extension device 4 is fixedly connected with the main hanging plate 31 and the side hanging plate 32. The longitudinal connecting means 4 are mainly steel longitudinal ribs 41 arranged in parallel, and steel stirrups 42 for bundling the longitudinal ribs 41 are provided to maintain their stability. So as to pour concrete into the reinforcement cage formed by the longitudinal bars 41 and the stirrups 42 to form the newly-added reinforced concrete beam.
Example 2
Figures 6-8 provide a node connecting device for adding reinforced concrete beams between existing reinforced concrete beams. Specifically, fig. 6 is a schematic perspective view of the node connecting device in this embodiment. Fig. 7 is a schematic perspective view of the connection of the node connecting device between two beams in this embodiment. Fig. 8 is a schematic perspective view of the installed node connection device between two beams in this embodiment.
As can be seen from fig. 6-8, the node connecting device comprises a steel hoop 1 enclosing a circle of an existing reinforced concrete beam KL1, and a horizontal and vertical connecting structure similar to the top plate 21, the bottom plate 22, the main hanging plate 31 and the side hanging plate 32 shorter than the main hanging plate 31 in the embodiment is arranged on one side of the hoop 1, which needs to be constructed with a new concrete beam KL 2. Except that the top plate 21 is a rectangular connecting plate having the same shape as the bottom plate 22. The connecting structures are correspondingly arranged on two parallel and opposite existing reinforced concrete beams KL1 of which the reinforced concrete beams need to be newly added. And a frame structure for filling concrete is formed on the connecting structure by welding the longitudinal ribs 21, and a newly-added reinforced concrete beam is formed after the concrete is filled (as shown in figure 8).
Example 3
Fig. 9 provides a joint connecting device for newly adding cantilever beams at the joint of the existing reinforced concrete beam and the concrete column. Specifically, fig. 9 is a schematic perspective view of the node connection device in this embodiment. As can be seen from fig. 9, the node connecting device is formed by adding cantilever beams at the joint of the existing reinforced concrete beam and the existing concrete column. The connection structure at the node is similar to that shown in embodiment 1. The difference lies in that: first, the vertical connecting device 3 is provided only on one side of the newly added outrigger, and the vertical connecting device is provided with only one main hanging plate 31. The main vertical plate 31 is provided with a through hole, and the through hole is fixedly connected with a through hole correspondingly arranged on the vertical surface of the I-shaped steel beam serving as the cantilever beam through a connecting piece such as a bolt. Meanwhile, the upper surface of the i-shaped outrigger 6 is welded and fixed with the lower surface of the top plate 21, and the lower surface is welded and fixed with the upper surface of the bottom plate 22 (the upper and lower surfaces of the main vertical plate 31 are not fixed with the horizontal connecting device).
Example 4
This embodiment provides a method for adding a reinforced concrete beam to an existing reinforced concrete column by using the node connecting device described in embodiment 1, which includes the following steps:
1) removing four concrete protective layers at the position of an existing reinforced concrete column where a reinforced concrete beam or cantilever beam needs to be newly added, and exposing longitudinal bars and stirrups of the existing column; the thickness of the protective layer peeling is not less than that of the steel ferrule, so that the bottom non-peeled part can support the steel ferrule;
2) calculating the number and diameter of anchoring ribs to be implanted at the newly added reinforced concrete beam, and implanting the anchoring ribs by adopting a chemical bar-planting method according to the calculation result; when the column is implanted, the position conflict between the column and the longitudinal steel bars and the transverse stirrups in the existing column is avoided as much as possible;
3) installing the steel hoop sleeve provided with the through holes corresponding to the anchoring ribs in the step (2) at the newly added reinforced concrete beam, welding and fixing the adjacent hoop sleeve plates into a whole, and then welding and fixing each anchoring rib and the steel hoop sleeve; wherein the thickness of the steel ferrule is not less than 10 mm;
4) welding a horizontal connecting device and a vertical connecting device on the outer side of the steel hoop sleeve;
5) welding longitudinal steel bars of the newly-added reinforced concrete columns on the horizontal connecting device and the vertical connecting device in the step (4), and fixing the longitudinal steel bars by using stirrups;
6) filling and compacting a gap between the steel ferrule and the existing column by adopting high-strength non-shrinkage concrete grouting material;
7) and pouring the concrete of the newly added beam.
The method is practically applied to a strengthening and reforming project of a Zhongting hotel with a Tung nan Ge state banquet in Harbin city, the deflection of the newly added beam and the residual deflection percentage after unloading are measured after the construction is finished, the results are respectively 1.194mm and 8.8 percent and are respectively less than the requirements of 22.25mm (L/400) and 15 percent of the technical requirements, and no crack occurs on the newly added beam and the floor slab. The structural bearing capacity of the beam newly added by the method meets the standard and can meet the use load requirement.
It should be noted that, besides the structures disclosed in the above embodiments, those skilled in the art may adapt the structure of the node connection device according to specific working conditions. For example, for a circular column, the steel ferrule 1 may be adjusted to be circular or the like.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A node connecting device for adding beams on an existing reinforced concrete column beam is characterized by comprising a hoop (1) nested and enclosed at the periphery of the joint of the existing reinforced concrete column or concrete beam, a horizontal connecting device (2) and a vertical connecting device (3) fixedly connected with the hoop (1), an anchoring rib (5) and a newly added beam supporting structure fixedly connected with the horizontal connecting device (2) and the vertical connecting device (3); the hoop (1) is provided with a plurality of through holes, and the anchoring ribs (5) penetrate through the through holes to be fixed with the existing reinforced concrete columns or concrete beams; the hoop (1) is fixed along the peripheral surface of the existing reinforced concrete column or concrete beam to form a whole.
2. A node connecting device of an added beam on an existing reinforced concrete column beam according to claim 1, characterized in that the horizontal connecting device (2) comprises a plurality of top plates (21) and bottom plates (22) which are horizontally arranged; the top plates (21) are positioned on the same horizontal plane, and the edges of the top plates are welded and fixed to form a ring-shaped structure.
3. A node connecting device of an added beam on an existing reinforced concrete column beam as claimed in claim 2, wherein a vertical connecting device (3) is positioned between the top plate (21) and the bottom plate (22), the vertical connecting device (3) comprises a main vertical plate (31) fixedly welded with the lower surface of the top plate (21) and the upper surface of the bottom plate (22), and side vertical plates (32) fixedly connected with at least the lower surface of the top plate (21) and positioned at two sides of the main vertical plate (31).
4. A node connecting device of an added beam on an existing reinforced concrete column beam according to claim 3, characterized in that the added beam supporting structure is a longitudinal reinforcing bar device (4) fixedly connected with the upper surface of the top plate (21), the lower surface of the bottom plate (22) and the side surfaces of the main vertical plate (31) and the side vertical plates (32).
5. A new beam nodal connection on an existing reinforced concrete column beam as claimed in claim 2, characterised in that the vertical connection means (3) comprises outriggers (6) between said top plate (21) and said bottom plate (22); the cantilever beam (61) comprises an I-shaped steel beam and a main vertical plate (31); the main vertical plate (31) is fixedly welded with the outer side surface of the hoop sleeve (1); the upper surface of the I-shaped steel beam is welded and fixed with the lower surface of the top plate (21), and the lower surface of the I-shaped steel beam is welded and fixed with the upper surface of the bottom plate (22).
6. The node connecting device for newly added beams on the existing reinforced concrete column beam is characterized in that a plurality of through holes are correspondingly formed in the vertical surface of the I-shaped steel beam and the main vertical plate (31), and the I-shaped steel beam and the main vertical plate (31) are fixedly connected through a fixing device (61) penetrating through the through holes.
7. The node connecting device of the newly added beam on the existing reinforced concrete column beam as claimed in claim 1, wherein the anchoring rib (5) is implanted and anchored on the existing reinforced concrete column or concrete beam through the through holes uniformly arranged on the hoop (1); or the hoop (1) is welded and fixed with the steel bars in the existing reinforced concrete columns or concrete beams through the through holes arranged on the hoop.
8. The node connecting device for the newly added beam on the existing reinforced concrete column beam as claimed in claim 1, wherein the outer surface of the hoop (1) is not higher than the outer surface of the existing reinforced concrete column.
9. A method for constructing a newly added reinforced concrete beam by using the node connecting device of any one of claims 1 to 8, which is characterized by comprising the following steps:
(1) removing four concrete protective layers at the position of an existing reinforced concrete column where a reinforced concrete beam or cantilever beam needs to be newly added, and exposing longitudinal bars and stirrups of the existing column;
(2) calculating the number and diameter of anchoring ribs to be implanted at the newly added reinforced concrete beam, and implanting the anchoring ribs by adopting a chemical bar-planting method according to the calculation result;
(3) installing the steel hoop sleeve provided with the through holes corresponding to the anchoring ribs in the step (2) at the newly added reinforced concrete beam, welding and fixing the adjacent hoop sleeve plates into a whole, and then welding and fixing each anchoring rib and the steel hoop sleeve;
(4) welding a horizontal connecting device and a vertical connecting device on the outer side of the steel hoop sleeve;
(5) welding longitudinal steel bars of the newly-added reinforced concrete columns on the horizontal connecting device and the vertical connecting device in the step (4), and fixing the longitudinal steel bars by using stirrups;
(6) filling and compacting a gap between the steel ferrule and the existing column by adopting high-strength non-shrinkage concrete grouting material;
(7) and pouring the concrete of the newly added beam.
10. The method of claim 9, wherein the steel ferrule has a thickness of no less than 10 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911011073.XA CN110630032A (en) | 2019-10-23 | 2019-10-23 | Node connecting device for newly adding beam on existing reinforced concrete column beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911011073.XA CN110630032A (en) | 2019-10-23 | 2019-10-23 | Node connecting device for newly adding beam on existing reinforced concrete column beam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110630032A true CN110630032A (en) | 2019-12-31 |
Family
ID=68977309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911011073.XA Pending CN110630032A (en) | 2019-10-23 | 2019-10-23 | Node connecting device for newly adding beam on existing reinforced concrete column beam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110630032A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111877545A (en) * | 2020-07-10 | 2020-11-03 | 中建钢构天津有限公司 | Connecting structure of concrete column and multi-angle concrete beam |
| CN113653359A (en) * | 2021-09-18 | 2021-11-16 | 刘征 | Newly-added beam and existing column joint annular steel plate hoop conversion connection structure |
| CN115434536A (en) * | 2022-09-29 | 2022-12-06 | 江苏省江南建筑技术发展有限公司 | Node external member for additionally arranging concrete interlayer in tall space and construction method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101649678A (en) * | 2009-07-24 | 2010-02-17 | 天地金草田（北京）科技有限公司 | Structure for strengthening node of beam column by section increase method and construction method thereof |
| KR101233693B1 (en) * | 2011-08-11 | 2013-02-18 | 이창남 | Seismic connection system of steel girders to the pre-fabricated src column composed of angle shapes |
| CN105569191A (en) * | 2016-01-23 | 2016-05-11 | 安徽鸿路钢结构(集团)股份有限公司 | Steel-encased concrete composite beam-steel pipe column connection joint |
| CN106703432A (en) * | 2016-12-28 | 2017-05-24 | 北京城建亚泰建设集团有限公司 | Newly-added steel girder and original reinforced concrete column hoop connecting joint and connecting method thereof |
| CN108179806A (en) * | 2018-02-01 | 2018-06-19 | 胡习兵 | A kind of complete assembled steel reinforced concrete frame structure system |
| CN109537726A (en) * | 2018-12-29 | 2019-03-29 | 天津大学 | Rectangle steel tubing string-H girder steel is bolted structures with semi-rigid joints and construction method entirely |
| CN211143826U (en) * | 2019-10-23 | 2020-07-31 | 黑龙江施耐达建筑技术有限公司 | Node connecting device for newly adding beam on existing reinforced concrete column beam |
-
2019
- 2019-10-23 CN CN201911011073.XA patent/CN110630032A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101649678A (en) * | 2009-07-24 | 2010-02-17 | 天地金草田（北京）科技有限公司 | Structure for strengthening node of beam column by section increase method and construction method thereof |
| KR101233693B1 (en) * | 2011-08-11 | 2013-02-18 | 이창남 | Seismic connection system of steel girders to the pre-fabricated src column composed of angle shapes |
| CN105569191A (en) * | 2016-01-23 | 2016-05-11 | 安徽鸿路钢结构(集团)股份有限公司 | Steel-encased concrete composite beam-steel pipe column connection joint |
| CN106703432A (en) * | 2016-12-28 | 2017-05-24 | 北京城建亚泰建设集团有限公司 | Newly-added steel girder and original reinforced concrete column hoop connecting joint and connecting method thereof |
| CN108179806A (en) * | 2018-02-01 | 2018-06-19 | 胡习兵 | A kind of complete assembled steel reinforced concrete frame structure system |
| CN109537726A (en) * | 2018-12-29 | 2019-03-29 | 天津大学 | Rectangle steel tubing string-H girder steel is bolted structures with semi-rigid joints and construction method entirely |
| CN211143826U (en) * | 2019-10-23 | 2020-07-31 | 黑龙江施耐达建筑技术有限公司 | Node connecting device for newly adding beam on existing reinforced concrete column beam |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111877545A (en) * | 2020-07-10 | 2020-11-03 | 中建钢构天津有限公司 | Connecting structure of concrete column and multi-angle concrete beam |
| CN113653359A (en) * | 2021-09-18 | 2021-11-16 | 刘征 | Newly-added beam and existing column joint annular steel plate hoop conversion connection structure |
| CN115434536A (en) * | 2022-09-29 | 2022-12-06 | 江苏省江南建筑技术发展有限公司 | Node external member for additionally arranging concrete interlayer in tall space and construction method |
| CN115434536B (en) * | 2022-09-29 | 2024-08-06 | 江苏省江南建筑技术发展有限公司 | Node suite for adding concrete interlayer in high and large space and construction method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109680810B (en) | Conversion node of upper steel pipe column and lower reinforced concrete column and construction method | |
| CN110630032A (en) | Node connecting device for newly adding beam on existing reinforced concrete column beam | |
| CN206844314U (en) | A kind of new prefabricated assembled bean column node | |
| CN106401069A (en) | Damage repairing assembly type combined column with self-reset function | |
| CN107574929B (en) | Section steel concrete beam column framework node and node construction method | |
| JP2017179997A (en) | Column-beam joint structure and construction method therefor | |
| CN107882328B (en) | Construction method of large-span steel truss suspension structure | |
| US10640970B2 (en) | Concrete building elements and assemblies thereof, and related methods | |
| CN217537350U (en) | Assembled type steel reinforced concrete beam column connecting node with inner and outer steel sleeves | |
| CN210067020U (en) | Sub-structure assembled frame structure | |
| KR101750177B1 (en) | Punching shear stiffening member of cutting bridge type and method for constructing footing using of the same | |
| CN201794353U (en) | Masonry structure capable of enhancing anti-collapse capacity and integrity under strong shock | |
| KR101521946B1 (en) | Enlarged capital of steel framed reinforced concrete column | |
| CN211143826U (en) | Node connecting device for newly adding beam on existing reinforced concrete column beam | |
| CN106121055B (en) | A kind of steel box column and beams of concrete connecting node and its construction method | |
| CN109356287B (en) | Cylindrical cap node at intersection of one column and multiple beams of concrete and forming method | |
| CN211172412U (en) | Connecting joint of beam main rib and cross steel rib column | |
| JP2007519844A (en) | Foundation reinforcement | |
| CN217001017U (en) | Be applicable to new and old concrete beam column node reinforced structure | |
| CN217840354U (en) | Assembled concrete beam column joint with concrete prefabricated rectangular pipe pile as upper column | |
| CN108252215A (en) | Connection structure of the board-like Suo-tower of trepanning and preparation method thereof | |
| CN105040828B (en) | A kind of round steel pipe binding type steel concrete column and steel beam joint structure | |
| CN212026598U (en) | Structure system suitable for assembled steel structure building | |
| CN210105124U (en) | Auxiliary reinforcing member for two-way inclined support column base | |
| CN109235943B (en) | Reinforced concrete prefabricated assembly type cinema stand structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |