CN114352052A - Method for reinforcing concrete frame node - Google Patents
Method for reinforcing concrete frame node Download PDFInfo
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- CN114352052A CN114352052A CN202111531710.3A CN202111531710A CN114352052A CN 114352052 A CN114352052 A CN 114352052A CN 202111531710 A CN202111531710 A CN 202111531710A CN 114352052 A CN114352052 A CN 114352052A
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- steel plate
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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
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- 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
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- 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
- E04B1/38—Connections for building structures in general
- E04B1/58—Connections for building structures in general of bar-shaped building elements
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- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Reinforcement Elements For Buildings (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
A method for reinforcing concrete frame joints includes embedding two rectangular special anchoring steel plates on the upper and lower surfaces of a concrete beam into upper and lower rectangular holes of the concrete beam respectively, reserving holes at four corner points of the special anchoring steel plates, penetrating four long bolts into the reserved holes of the upper and lower special anchoring steel plates respectively, and fastening the two special anchoring steel plates to the upper and lower surfaces of the beam by nuts. The steel wire rope and the chicken heart clamp are penetrated into the bolt with the hole to form a ring, the lap joint of the steel wire rope is screwed and connected by the U-shaped bolt, and then the device is inserted into the cube blocks on the special anchoring steel plates of the upper part and the lower part of the beam around the column. After insertion, the nut is tightened to a predetermined applied force by applying a prestress with a tensioning device to securely connect the column to the beam. A groove-shaped base plate is used on the contact surface of the steel wire rope and the column to prevent the steel wire rope from extruding concrete. And angle steel is arranged at the pressed part of the upper node and the lower node of the beam column and is connected by a long bolt. The reinforced member has better ductility and the maximum bearing capacity is improved.
Description
Technical Field
The invention relates to the field of civil engineering, in particular to a method for reinforcing concrete frame joints.
Background
The structural member needs to be reinforced under the following conditions, (1) concrete often appears in actual engineering and does not reach the design strength; (2) the existing old building has low design standard, insufficient bearing capacity and aging structure, which causes the phenomenon of prestress hysteresis and great damage to the original structure; (3) the function changes, such as: the classroom becomes a library; (4) and (5) repairing after earthquake. The existing reinforcing method comprises (1) a section enlarging method, which has the defects that the self weight of the structure is increased, and the rigidity distribution of the structure is possibly changed, so that the interlocking reinforcement of other adjacent components is caused; (2) the steel-clad reinforcement method has the defects of high cost and complex construction; (3) the anchor plate is reinforced, the defect is the limitation of the application range, and the reinforcing effect depends on the gluing process and the operation level to a great extent; (4) the carbon fiber reinforcing method has the defect that the finishing quality depends on the selection of the carbon fiber cloth and the special structural adhesive to a great extent. Therefore, it is desirable to provide a reinforcement method to solve the above problems.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for reinforcing a concrete frame node, which has the advantages of simple construction, low cost and enhanced rigidity and ultimate strength of a beam-column node, aiming at the defects of the prior art.
The technical problem to be solved by the invention is realized by the following technical scheme, and the invention discloses a method for reinforcing a concrete frame node, which is characterized by comprising the following steps of:
(1) preparing a special anchoring steel plate according to the area under the concrete beam, wherein the area of the special anchoring steel plate is larger than the area under the concrete beam, holes are formed in four corners of the special anchoring steel plate, and cubic steel blocks are welded on the special steel plate respectively;
(2) and special rectangular steel plates are arranged on the upper part and the lower part of the end part of the beam, bolt holes are reserved at four corners of each special steel plate, then four long bolts are respectively penetrated into the reserved pore passages of the upper special steel plate and the lower special steel plate, and the two special steel plates are connected and fixed on the upper surface and the lower surface of the beam by being screwed down by nuts. Respectively welding cubic steel blocks on the special steel plates, and reserving bolt holes on the cubic steel blocks;
(3) the steel wire rope and the chicken heart clamp are inserted into the bolt with the hole, the head of the bolt is attached with a strain gauge, so that the change of the force in the process of applying the prestress can be conveniently monitored to form a ring, the lap joint of the steel wire rope is screwed and connected by a U-shaped bolt, and then the device is inserted into the cube blocks on the upper and lower special steel plates of the beam around the column;
(4) after insertion, the column is securely connected to the beam by tightening it with a wrench to a pre-determined applied force. The contact surface of the steel wire rope and the column is protected by a groove-shaped base plate so as not to extrude concrete;
(5) specially-made angle steels with holes are respectively arranged at the upper node and the lower node of the beam column, then long bolts are respectively penetrated into reserved holes of the upper specially-made angle steels and the lower specially-made angle steels, and the two specially-made steel plates are connected and fixed on the upper surface and the lower surface of the beam by being screwed down by nuts. And then two inclined supports are welded on the angle steel to resist the damage of the extrusion force to the beam-column joint. And filling the gap between the angle steel and the contact surface of the beam column with epoxy mortar.
The technical problem to be solved by the present invention can be further solved by the following technical solutions, in the above method for reinforcing a concrete frame node: the method for fixing the upper and lower special steel plates comprises the following steps:
(1) digging a concrete protective layer with the thickness of 12mm from the upper part and the lower part of the concrete beam;
(2) embedding the special steel plate into the concrete tank;
(3) and long bolts are inserted into the special steel plate reserved holes to connect and fix the upper special steel plate and the lower special steel plate on the concrete beam.
The technical problem to be solved by the present invention can be further solved by the following technical solutions, in the above method for reinforcing a concrete frame node: the steel wire rope penetrates into the bolt with the hole, and the method comprises the following steps:
(1) adhering the strain gauge on the surface of the bolt with the hole by using epoxy resin, and wrapping the epoxy resin by using medical gauze;
(2) the heart-shaped clamp is inserted into the bolt with the hole (two sets of the device);
(3) and a steel wire rope penetrates into the two perforated bolts to form a closed loop, and then the closed loop is fixed at the lap joint of the closed loop by a U-shaped bolt.
The technical problem to be solved by the present invention can be further solved by the following technical solutions, in the above method for reinforcing a concrete frame node: the perforated bolt penetrates into the cube block, and the steps are as follows:
(1) exposing the head of the bolt cube block with the hole;
(2) and sleeving the nut into the bolt, and applying prestress to tighten.
The technical problem to be solved by the present invention can be further solved by the following technical solutions, in the above method for reinforcing a concrete frame node: the special steel plate is larger than the upper area and the lower area of the concrete beam, so that bolt holes at four corners of the special steel plate are cantilevered out of the beam.
The technical problem to be solved by the present invention can be further solved by the following technical solutions, in the above method for reinforcing a concrete frame node: and sleeving three U-shaped bolts at the lap joint of the steel wire ropes and screwing the three U-shaped bolts.
Compared with the traditional method for reinforcing the frame joint, the method for reinforcing the prestressed steel wire rope can ensure that the reinforced member has better ductility and improves the maximum bearing capacity, the steel wire rope has lighter self weight, the occupied space is less when the structure is reinforced, the self weight of the structure is not increased, and the space requirement of a user can be met to a greater extent. The construction is simple, the cost is low, and the rigidity and the ultimate strength of the beam-column joint are enhanced.
Drawings
FIG. 1 is a front view of a concrete framework;
fig. 2 is a top view of the concrete framework.
Detailed Description
The following further describes particular embodiments of the present invention to facilitate further understanding of the present invention by those skilled in the art, and does not constitute a limitation to the right thereof.
In the figure: 1. the steel wire rope comprises a steel wire rope, 2 parts of perforated bolts, 3 parts of cube blocks, 4 parts of special steel plates, 5 parts of long bolts, 6 parts of angle steel, 7 parts of long bolts, 8 parts of inclined struts, 9 parts of nuts, 10 parts of nuts and 11 parts of groove-shaped base plates.
A method for reinforcing a concrete frame node, comprising the steps of:
(1) preparing a special anchoring steel plate according to the area under the concrete beam, wherein the area of the special anchoring steel plate is larger than the area under the concrete beam, holes are formed in four corners of the special anchoring steel plate, and cubic steel blocks are welded on the special steel plate respectively;
(2) and special rectangular steel plates are arranged on the upper part and the lower part of the end part of the beam, bolt holes are reserved at four corners of each special steel plate, then four long bolts are respectively penetrated into the reserved pore passages of the upper special steel plate and the lower special steel plate, and the two special steel plates are connected and fixed on the upper surface and the lower surface of the beam by being screwed down by nuts. And respectively welding cubic steel blocks on the special steel plates, and reserving bolt holes on the cubic steel blocks. (ii) a
(3) The steel wire rope and the chicken heart clamp are inserted into the bolts (2) with holes, the head parts of the bolts are adhered with strain gauges, so that the change of force in the process of applying prestress can be conveniently monitored to form a ring, the lap joints of the steel wire rope are screwed and connected by U-shaped bolts, and then the device (2 sets) is inserted into the cube blocks on the upper and lower special steel plates of the beam around the column;
(4) after insertion, the column is securely connected to the beam by tightening it with a wrench to a pre-determined applied force. The contact surface of the steel wire rope and the column is protected by a groove-shaped base plate so as not to extrude concrete;
(5) specially-made angle steels with holes are respectively arranged at the upper node and the lower node of the beam column, then long bolts are respectively penetrated into reserved holes of the upper specially-made angle steels and the lower specially-made angle steels, and the two specially-made steel plates are connected and fixed on the upper surface and the lower surface of the beam by being screwed down by nuts. And then two inclined supports are welded on the angle steel to resist the damage of the extrusion force to the beam-column joint. And filling the gap between the angle steel and the contact surface of the beam column with epoxy mortar.
In the above method for reinforcing a concrete frame node: the method for fixing the upper and lower special steel plates comprises the following steps:
(1) digging a concrete protective layer with the thickness of 12mm from the upper part and the lower part of the concrete beam;
(2) embedding the special steel plate into the concrete tank;
(3) and long bolts are inserted into the special steel plate reserved holes to connect and fix the upper special steel plate and the lower special steel plate on the concrete beam.
In the above method for reinforcing a concrete frame node: the steel wire rope penetrates into the bolt with the hole, and the method comprises the following steps:
(1) adhering the strain gauge on the surface of the bolt with the hole by using epoxy resin, and wrapping the epoxy resin by using medical gauze;
(2) the heart-shaped clamp is inserted into the bolt with the hole (two sets of the device);
(3) and a steel wire rope penetrates into the two perforated bolts to form a closed loop, and then the closed loop is fixed at the lap joint of the closed loop by a U-shaped bolt.
In the above method for reinforcing a concrete frame node: the perforated bolt penetrates into the cube block, and the steps are as follows:
(1) exposing the head of the bolt cube block with the hole;
(2) and sleeving the nut into the bolt, and applying prestress to tighten.
In the above method for reinforcing a concrete frame node: the special steel plate is larger than the upper area and the lower area of the concrete beam, so that bolt holes at four corners of the special steel plate are cantilevered out of the beam.
In the above method for reinforcing a concrete frame node: and sleeving three U-shaped bolts at the lap joint of the steel wire ropes and screwing the three U-shaped bolts.
Claims (6)
1. A method for reinforcing a concrete frame node, characterized by: the method comprises the following steps of,
(1) preparing a special anchoring steel plate according to the area under the concrete beam, wherein the area of the special anchoring steel plate is larger than the area under the concrete beam, holes are formed in four corners of the special anchoring steel plate, and cubic steel blocks are welded on the special steel plate respectively;
(2) specially-made anchoring rectangular steel plates are arranged on the upper portion and the lower portion of the end portion close to the beam, bolt holes are reserved in four corners of each special steel plate, then four long bolts penetrate through reserved hole channels of the upper special steel plate and the lower special steel plate respectively, the two special steel plates are connected and fixed on the upper surface and the lower surface of the beam through screwing of nuts, cubic steel blocks are welded on the special steel plates respectively, and bolt holes are reserved in the cubic steel blocks;
(3) the steel wire rope and the chicken heart clamp are inserted into the bolt with the hole, the head of the bolt is attached with a strain gauge, so that the change of the force in the process of applying the prestress can be conveniently monitored to form a ring, the lap joint of the steel wire rope is screwed and connected by a U-shaped bolt, and then the device is inserted into the cube blocks on the upper and lower special steel plates of the beam around the column;
(4) after inserting, a tensioning device applies prestress to tighten the steel wire rope to a preset applied force so as to ensure that the column is reliably connected with the beam, and a groove-shaped base plate is used for protecting the steel wire rope from extruding concrete on the contact surface of the steel wire rope and the column;
(5) specially-made angle steels with holes are respectively arranged at the upper node and the lower node of the beam column, long bolts penetrate into the reserved holes of the specially-made angle steels respectively, nuts are screwed down to connect and fix the two special steel plates on the upper surface and the lower surface of the beam, two inclined supports are welded on the angle steels to resist the damage of extrusion force to the beam column node, and the gap between the angle steels and the beam column contact surface is filled with epoxy mortar.
2. The method for reinforcing the concrete strength of the beam-column joint according to claim 1, wherein: the method for fixing the upper special anchoring steel plate and the lower special anchoring steel plate comprises the following steps:
digging a concrete protective layer with the thickness of 12mm from the upper part and the lower part of the concrete beam;
embedding the special steel plate into the concrete tank;
and long bolts are inserted into the special steel plate reserved holes to connect and fix the upper special steel plate and the lower special steel plate on the concrete beam.
3. The method for reinforcing the concrete strength of the beam-column joint according to claim 1, wherein: the steel wire rope penetrates into the bolt with the hole, and the method comprises the following steps:
adhering the strain gauge on the surface of the bolt with the hole by using epoxy resin, and wrapping the epoxy resin by using medical gauze;
the chicken heart clip is inserted into the bolt with the hole;
and a steel wire rope penetrates into the two perforated bolts to form a closed loop, and then the closed loop is fixed at the lap joint of the closed loop by a U-shaped bolt.
4. The method for reinforcing the concrete strength of the beam-column joint according to claim 1, wherein: the perforated bolt penetrates into the cube block, and the steps are as follows:
exposing the head of the bolt cube block with the hole;
and sleeving the nut into the bolt, and applying prestress to tighten.
5. A method of reinforcing a concrete frame node according to claim 2, wherein: the area of the special steel plate is larger than that of the concrete beam, so that bolt holes at four corners of the special steel plate are cantilevered out of the beam.
6. A method of reinforcing a concrete frame node according to claim 2, wherein: and sleeving three U-shaped bolts at the lap joint of the steel wire ropes and screwing the three U-shaped bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111531710.3A CN114352052B (en) | 2021-12-15 | 2021-12-15 | Method for reinforcing concrete frame node |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111531710.3A CN114352052B (en) | 2021-12-15 | 2021-12-15 | Method for reinforcing concrete frame node |
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| CN114352052A true CN114352052A (en) | 2022-04-15 |
| CN114352052B CN114352052B (en) | 2023-07-25 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006132303A (en) * | 2004-10-05 | 2006-05-25 | Maeda Corp | Fixing structure of steel frame stud to reinforced concrete beam |
| CN203755466U (en) * | 2014-04-03 | 2014-08-06 | 江西科技学院 | Rusted reinforced concrete frame plane joint strengthening device |
| CN108755951A (en) * | 2018-07-10 | 2018-11-06 | 大连理工大学 | Precast prestressed concrete frame energy-dissipating and shock-absorbing bean column node |
| CN209369030U (en) * | 2018-12-13 | 2019-09-10 | 长安大学 | A kind of beam-column joint of reinforced concrete frame with runback bit function |
| CN112095811A (en) * | 2020-09-30 | 2020-12-18 | 福建工程学院 | Adopt bolted connection's assembled concrete frame roof beam post trunk formula connected node |
| CN112942946A (en) * | 2021-02-05 | 2021-06-11 | 绍兴文理学院 | Assembly type tenon-and-mortise bracket type beam-column joint connection method |
-
2021
- 2021-12-15 CN CN202111531710.3A patent/CN114352052B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006132303A (en) * | 2004-10-05 | 2006-05-25 | Maeda Corp | Fixing structure of steel frame stud to reinforced concrete beam |
| CN203755466U (en) * | 2014-04-03 | 2014-08-06 | 江西科技学院 | Rusted reinforced concrete frame plane joint strengthening device |
| CN108755951A (en) * | 2018-07-10 | 2018-11-06 | 大连理工大学 | Precast prestressed concrete frame energy-dissipating and shock-absorbing bean column node |
| CN209369030U (en) * | 2018-12-13 | 2019-09-10 | 长安大学 | A kind of beam-column joint of reinforced concrete frame with runback bit function |
| CN112095811A (en) * | 2020-09-30 | 2020-12-18 | 福建工程学院 | Adopt bolted connection's assembled concrete frame roof beam post trunk formula connected node |
| CN112942946A (en) * | 2021-02-05 | 2021-06-11 | 绍兴文理学院 | Assembly type tenon-and-mortise bracket type beam-column joint connection method |
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| Publication number | Publication date |
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| CN114352052B (en) | 2023-07-25 |
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