CN114562118A - Repairing structure and method for damaged frame beam - Google Patents
Repairing structure and method for damaged frame beam Download PDFInfo
- Publication number
- CN114562118A CN114562118A CN202210156611.XA CN202210156611A CN114562118A CN 114562118 A CN114562118 A CN 114562118A CN 202210156611 A CN202210156611 A CN 202210156611A CN 114562118 A CN114562118 A CN 114562118A
- Authority
- CN
- China
- Prior art keywords
- concrete
- damaged frame
- steel plate
- column
- shaped steel
- 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
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- 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
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/025—Structures with concrete columns
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Environmental & Geological Engineering (AREA)
- Emergency Management (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Business, Economics & Management (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention relates to the technical field of building reinforcement, and provides a repairing structure for a damaged frame beam, which comprises a U-shaped steel plate, CFRP (carbon fiber reinforced plastics) cloth, a concrete beam column cast-in-place plate node assembly and a damaged frame beam to be repaired, wherein the concrete beam column cast-in-place plate node assembly is connected with the damaged frame beam to be repaired, the U-shaped steel plate is symmetrically arranged at the position where a beam end oblique crack occurs in a beam support negative bending moment section according to one sixth of the beam span, the U-shaped steel is connected with the concrete beam column cast-in-place plate node assembly, and the CFRP cloth is transversely adhered to the position where a beam middle positive bending moment action section occurs. Also provides a repairing method for the damaged frame beam, which comprises four steps. The invention can solve the problem of damage to the frame beam caused by overload overrun or integral anti-floating or local anti-floating of the basement bottom plate, and is suitable for the condition that large-scale unloading cannot be carried out after soil covering. And the damage caused by long service life, steel degradation or concrete damage can be solved.
Description
Technical Field
The invention relates to the technical field of building reinforcement, in particular to a repairing structure for a damaged frame beam.
Background
The active concrete frame beams are many built according to the design standards promulgated in the early 70's or 80's of the 20 th century, and the design load grades are generally low. With the increasing use function of the follow-up, the use requirement of heavy electric power facilities increases, the overload and overrun phenomenon is serious, and in addition, the steel corrosion and fatigue, the concrete deterioration and damage and other factors can easily cause the performance degradation of the structure or the component, which is particularly represented as concrete cracking, steel bar buckling and the like. The early-built frame beam has certain damage, and the hogging moment area of the continuous frame beam can generate unfavorable stress states of steel bar compression and concrete slab tension, so that the plate surface is cracked under larger tensile stress. At this time, the load bearing capacity limit condition of the structure is often controlled by the yield of the steel bars in the concrete slab in the hogging moment area. Under the limit state of normal use, the cracking and water seepage of the hogging moment zone plate can cause the degradation of structural rigidity and the reduction of durability, and the existing requirements cannot be met.
In the traditional technology, the reinforcing method of directly processing the damaged frame beam by using the carbon fiber cloth has limited improvement of the bending resistance and shearing resistance bearing capacity of the frame beam, low material utilization rate and small structural rigidity contribution, is not suitable for reinforcing the frame structure mainly by controlling structural deformation by using functions, and can also cause insufficient rigidity of the reinforced frame beam and overlarge deflection of the reinforced frame beam. And the single steel plate is used for reinforcement, so that the excessive steel consumption of the beam bottom can be caused, and similar reinforcement failure can occur.
Disclosure of Invention
The invention aims to provide a repair structure for a damaged frame beam, which can at least solve part of defects in the prior art.
In order to achieve the above purpose, the embodiments of the present invention provide the following technical solutions: the utility model provides a repair structure for damaged frame roof beam, includes U shaped steel board, CFRP cloth, the cast-in-place board node assembly of concrete beam column and treats prosthetic damaged frame roof beam, the cast-in-place board node assembly of concrete beam column is connected with the damaged frame roof beam that treats prosthetic, the U shaped steel board appears the cracked position of beam-ends slant in beam support hogging moment district section and arranges according to one sixth of beam span symmetrical arrangement, U shaped steel with the cast-in-place board node assembly of concrete beam column is connected, CFRP cloth transversely pastes and appears the crack position in the middle of the roof beam positive moment effect district section.
Further, the U-shaped steel plate is formed by welding the steel plates on two sides of the beam of the damaged frame beam to be repaired and the steel plate at the bottom of the beam of the damaged frame beam to be repaired.
Further, the steel plates on the two side edges of the beam are provided with through bolts, the steel plate at the bottom of the beam is provided with bar planting bolts, and the two bolts are fastened through nuts.
Further, a first row of bolt holes and a second row of bolt holes are respectively formed in the side face and the bottom portion, connected with the reinforced concrete beam, of the U-shaped steel plate, the first row of bolt holes penetrate through the through bolts, the nuts are fixed, the second row of bolt holes are formed in the embedded steel bar bolts, the nuts are fixed, and the bolt holes of the steel plate at the bottom of the beam are formed in the embedded steel bar bolts, and the nuts are fixed.
Further, the cast-in-place plate node assembly of the concrete beam column comprises a cast-in-place plate, an intersected frame beam, the concrete column, a reinforced steel plate and a column body steel plate, wherein the reinforced steel plate is welded with the beam bottom steel plate, the column body steel plate is provided with a column body steel bar planting bolt, and a reinforced plate is arranged at the intersection of the beam end lower part and the column.
Further, the structural adhesive is poured between the U-shaped steel plate and the damaged frame beam to be repaired, and a grouting hole and an exhaust hole are formed in the joint of the U-shaped steel plate and the concrete surface.
Further, the CFRP cloth is bonded on the position of the crack of the beam middle positive bending moment action section through resin.
The embodiment of the invention also provides the following technical scheme: a repairing method for a damaged frame beam comprises the following steps:
s1, trimming the damaged frame beam to be repaired,
s2, after finishing the repair, forming a U-shaped steel plate by the existing structure of the damaged frame beam to be repaired, and symmetrically arranging the U-shaped steel plate at the position where the beam end oblique crack appears in the beam support hogging moment section according to one sixth of the beam span,
s3, connecting the concrete beam column cast-in-place plate node assembly with the damaged frame beam to be repaired, connecting the concrete beam column cast-in-place plate node assembly with the U-shaped steel plate,
and S4, transversely sticking CFRP cloth at the position where the crack appears in the beam middle positive bending moment action section of the damaged frame beam to be repaired.
Further, the specific finishing treatment mode is as follows: the method comprises the following steps of polishing an original cylindrical surface or an original beam surface to be flat by using a handheld electric grinding wheel, grinding small round corners on the periphery of a column and at the corner parts of the beam, brushing bristles by using a steel wire brush, blowing clean by using compressed air, then cleaning the bottom of a concrete surface of a concrete column reinforcing area of a damaged frame beam to be repaired and a concrete beam-column cast-in-place plate node assembly, after treatment, repairing, pressing and leveling the surface which is not flat and a weathered surface by using a pick-and-chisel method, then repairing, pressing and leveling by using polymer mortar, and wiping the adhered surface by using a degreasing cotton ball and acetone.
Further, post body steel sheet attached post peripheral round angle department of cast-in-place board node assembly of concrete beam column derusts, and after the steel sheet all around was pieced together and welded, the U shaped steel sheet after will derusting was attached on roof beam both sides limit steel sheet and beam bottom steel sheet, found the drilling position of waiting prosthetic damage type frame roof beam again accurately, marked out the hole core point, drilled and carried out the pore-forming clearance on the surface, fixed U shaped steel sheet behind the pore-forming position bar planting bolt, and right U shaped steel sheet with the post body steel sheet welds, welds the stiffening plate of beam column juncture again.
Compared with the prior art, the invention has the beneficial effects that:
1. the damage of the frame beam caused by overload overrun or integral anti-floating or local anti-floating of the basement bottom plate can be solved, and the method is suitable for the condition that large-scale unloading cannot be carried out after soil covering. And the damage caused by long service life, steel degradation or concrete damage can be solved. The structure has the advantages of high bearing capacity, high rigidity, reliable stress, good anti-seismic performance and strong constraint capacity.
2. The construction is convenient, the period is short, the construction is simple and effective, the coordination deformation effect of the beam column joint can be effectively enhanced, and the brittle failure of the joint is avoided.
3. The U-shaped steel plate is arranged in the hogging moment section, and because the stress complex area is arranged, the hogging moment resistance bearing capacity of the damaged frame beam is increased, and meanwhile, the shear resistance bearing capacity and the rigidity of the damaged frame beam are improved by utilizing the lateral steel plates.
4. The method can effectively utilize multiple functions of reinforcing the concrete beam by the U-shaped steel plate, obviously improve the bending resistance bearing capacity and the shearing bearing capacity, improve the ductility, effectively inhibit the development of cracks and obviously reduce the deflection of the member.
5. The U-shaped steel plate and the column body steel plate are fixed by the bar planting bolts, the bar planting bolts drive concrete in the length range of the bar planting bolts and the whole steel plate to participate in stress, and the stress and force transmission system is reasonable and reliable.
6. The CFRP cloth is arranged in the middle bending moment section, and the part is usually a U-shaped crack and has the control function of beam bottom positive bending moment, so that the damage to the middle part of the frame beam can be solved, and the construction speed is increased by utilizing the characteristic of light weight and convenience in construction of the CFRP cloth.
7. The concrete beam column cast-in-place slab node combination body is reinforced by steel coating, and the design principle of strong shear weak bending, strong column weak beam and strong node weak component can be realized
Drawings
Fig. 1 is a schematic structural diagram of a repair structure for a damaged frame beam according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a cross-sectional view B-B of FIG. 1;
FIG. 4 is a cross-sectional view C-C of FIG. 3;
fig. 5 is a schematic view of a stiffener for a repair structure of a damaged frame beam according to an embodiment of the present invention;
in the reference symbols: 1. a damaged frame beam to be repaired; 2. a U-shaped steel plate; 3. CFRP cloth; 4. a concrete beam column cast-in-place plate node assembly; 5. structural adhesive; 6. a bottom resin; 7. a stiffening plate; 21. a beam support hogging moment section; 132. a nut; 31. a beam middle positive bending moment action section; 32. the middle section of the beam has a U-shaped crack; 33. a V-shaped groove; 23. steel plates are arranged on two side edges of the beam; 24. a beam bottom steel plate; 25. oblique cracks at the beam ends; 222. planting a rib bolt; 231. penetrating a bolt; 40. casting a plate in situ; 41. a concrete column; 42. a column steel plate; 44. planting a steel bar bolt on the column body; 401. intersecting the frame beams; 402. and reinforcing the steel plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, 2, 3, 4 and 5, an embodiment of the present invention provides a repair structure for a damaged frame beam, including a U-shaped steel plate 2, a CFRP cloth 3, a concrete beam-column cast-in-place plate node assembly 4, and a damaged frame beam 1 to be repaired, where the concrete beam-column cast-in-place plate node assembly 4 is connected to the damaged frame beam 1 to be repaired, the U-shaped steel plate 2 is symmetrically arranged at a position where a beam-end oblique crack 25 occurs in a beam-support negative-moment section 21 according to one sixth of a beam span, the U-shaped steel is connected to the concrete beam-column cast-in-place plate node assembly 4, and the CFRP cloth 3 is transversely attached to a position where a crack occurs in a beam-middle positive-moment acting section 31. Preferably, the U-shaped steel plate 2 is formed by welding the steel plates 23 on two sides of the beam of the damaged frame beam 1 to be repaired and the steel plate 24 at the bottom of the beam of the damaged frame beam 1 to be repaired. The steel plates 23 on the two sides of the beam are provided with opposite-penetrating bolts 231, the steel plate 24 at the bottom of the beam is provided with a bar-planting bolt 222, and the two are fastened through nuts 132. Referring to fig. 2, a first row of bolt holes and a second row of bolt holes are respectively formed in the side surface and the bottom of the U-shaped steel plate 2 connected to the reinforced concrete beam, the first row of bolt holes penetrate through the through bolts 231 and are fixed by the nuts 132, the second row of bolt holes are fixed by the nuts 132 after the steel bar planting bolts 222 are implanted, and the bolt holes of the steel plate 24 at the bottom of the beam are fixed by the nuts 132 after the steel bar planting bolts 222 are implanted. The cast-in-place concrete beam-column plate node assembly 4 comprises a cast-in-place plate 40, an intersected frame beam 401, a concrete column 41, a reinforced steel plate 402 and a column body steel plate 42, wherein the reinforced steel plate 402 is welded with the beam bottom steel plate 24, the column body steel plate 42 is provided with a column body steel bar planting bolt 44, and a stiffening plate 7 is arranged at the intersection of the beam end lower part and the column. Preferably, the U-shaped steel plate 2 is fully welded to the reinforcing steel plate 402 of the concrete beam-column cast-in-place slab node assembly 4. The CFRP cloth 3 is transversely stuck at the position where the crack appears in the middle positive bending moment action section 31 of the beam, in particular to the position where the U-shaped crack 32 appears in the middle section of the beam. Preferably, the CFRP cloth 3 is transversely attached to the beam middle positive bending moment action section 31 of the damaged frame beam 1 to be repaired, specifically, the bottom resin 6 is coated, and after curing, a smooth surface is formed and then the adhesive resin is coated. Therefore, the structure utilizes the hogging moment of the U-shaped steel plate 2 to resist the bearing capacity and the lateral rigidity, and can obviously improve the shearing resistance bearing capacity and the rigidity of the damaged frame beam; the method can effectively utilize multiple functions of reinforcing the concrete beam by the U-shaped steel plate, obviously improve the shearing bearing capacity, improve the ductility, effectively inhibit the development of cracks and obviously reduce the deflection of the member.
As an optimization scheme of the embodiment of the invention, the type between the steel plates 23 on the two sides of the beam of the damaged frame beam 1 to be repaired and the steel plate 24 at the bottom of the beam of the damaged frame beam 1 to be repaired is Q355B grade, the thickness is not less than 10mm, the connection mode is full-length welding, the welding line grade is II grade, and the thickness of the butt welding line is not less than 6 mm.
As an optimized scheme of the embodiment of the invention, the bar-planting bolt 222 or the through bolt 231 is adopted, the diameter of the bolt is 12mm, the implantation depth is not less than 15d, the distribution distance is arranged according to the damage condition of the beam, and 300mm can be adopted.
As an embodiment of the inventionAccording to the optimization scheme, structural adhesive 5 is poured between the U-shaped steel plate 2 and the damaged frame beam 1 to be repaired, and a grouting hole and an exhaust hole are formed in the joint of the U-shaped steel plate 2 and the concrete surface. Preferably, the gap between the concrete column 41 and the steel plate 42 is also filled with structural epoxy resin glue 5. Referring to FIGS. 3 and 4, the CFRP cloth 3 is of type I300 g/m2The unidirectional high-strength carbon fiber cloth machine braided fabric is prepared by matching epoxy resin impregnating adhesive.
As an optimized scheme of the embodiment of the present invention, please refer to fig. 5, the stiffening plates 7 are respectively disposed at the intersection of the periphery of the reinforced concrete column 41 and the beam end, one side of each stiffening plate is welded to the steel plate at the bottom of the beam, and the other side of each stiffening plate is welded to the steel plate at the column side. Preferably, the type 7 of the stiffening plate adopts Q355B grade, the thickness is not less than 5mm, and the welding seam grade is II grade. The U-shaped steel plate 2 and the column body steel plate 42 are fixed by using the embedded bar bolts 222, the embedded bar bolts 222 drive the concrete in the length range of the embedded bar bolts and the whole steel plate to participate in stress, and the stress and force transmission system is reasonable and reliable; cracks of the reinforced rear beam are uniform, the steel plate with smaller thickness is preferably selected for fully utilizing the strength of the steel plate when the distance between the bar planting bolts 222 is fixed; in order to further improve the reinforcing effect, an unloading reinforcing method is preferably adopted. The CFRP cloth 3 is arranged in the middle bending moment section, and the part is usually a U-shaped crack and the control function is the beam bottom positive bending moment function, so that the damage to the middle part of the frame beam can be solved by adopting the scheme, and meanwhile, the construction speed is increased by utilizing the characteristic of light dead weight and convenient construction of the CFRP cloth 3.
The embodiment of the invention also provides a method for repairing the damaged frame beam, which comprises the following steps: s1, trimming the damaged frame beam 1 to be repaired, S2, after the trimming is finished, forming a U-shaped steel plate 2 by the existing structure of the damaged frame beam 1 to be repaired, symmetrically arranging the U-shaped steel plate 2 at the position where the beam end oblique crack 25 appears in the beam support negative bending moment section 21 according to one sixth of the beam span, S3, connecting the damaged frame beam 1 to be repaired to form a concrete beam column cast-in-place plate node assembly 4, connecting the concrete beam column cast-in-place plate node assembly 4 with the U-shaped steel plate 2, and S4, transversely pasting CFRP cloth 3 at the position where the crack appears in the beam middle positive bending moment action section 31 of the damaged frame beam 1 to be repaired. Preferably, the specific finishing treatment mode is as follows: the method comprises the following steps of polishing an original cylindrical surface or an original beam surface to be flat by using a handheld electric grinding wheel, polishing small round corners at the periphery of the beam and at the corner parts of the beam, brushing bristles by using a steel wire brush, blowing clean by using compressed air, cleaning the bottom of the damaged frame beam 1 to be repaired and the concrete surface of a concrete column 41 reinforced area of a concrete beam-column cast-in-place plate node assembly 4, repairing, pressing and leveling the uneven surface and the weathered surface by using a chipping method after treatment, repairing, pressing and leveling the adhered surface by using polymer mortar, and wiping the adhered surface by using a degreasing cotton ball and acetone. Post body steel sheet 42 of cast-in-place board node assembly 4 of concrete beam column is attached in post round angle department all around after the rust cleaning, and after the steel sheet is tailor-welded all around, with U shaped steel board 2 after the rust cleaning attached on roof beam both sides limit steel sheet 23 and beam bottom portion steel sheet 24, find the drilling position of waiting prosthetic damage type frame roof beam 1 again, mark out the hole core point, drill and carry out the pore-forming clearance on the surface, fix U shaped steel board 2 behind pore-forming position bar planting bolt 222, and right U shaped steel board 2 with post body steel sheet 42 welds, welds the stiffening plate 7 of beam column juncture again.
Specifically, after finishing treatment, the sizes and the numbers of the U-shaped steel plates 2 and the column body steel plates 42 can be determined according to design, lofting and blanking are carried out, straightening and forming are carried out, holes are drilled in the U-shaped steel plates, and then rust removal is carried out by using a sand blasting or grinding wheel polishing method. After the stiffening plate 7 at the beam-column junction is welded, the joint of the outer edge of the steel plate and the concrete surface is sealed by epoxy resin mortar, an exhaust port is reserved, an injection port is reserved at the upper part of the injection structural adhesive 5, and the steel-clad injection structural adhesive 5 is pressed into the injection port under the pressure of 0.2-0.4 MPa. And finally, sealing the reinforcing surface by cement mortar, and performing anticorrosion and fireproof treatment on the U-shaped steel plate 2, the column body steel plate 42 and the stiffening plate 7. After the steps are completed, the crack of the beam middle positive bending moment action section 31 is treated, specifically, the corrosion prevention and fire prevention treatment is carried out.
And measuring and evaluating damage of a U-shaped crack in the positive bending moment action section 31 in the middle of the beam, coating epoxy resin glue on the crack for sealing or performing epoxy resin joint pouring treatment, filling the V-shaped groove 33 with structural glue 5, removing oil stains and miscellaneous scales on the surface of the concrete, and flattening the surface. Wherein, the cracks with the gaps smaller than 0.2mm are coated and sealed by epoxy resin glue; and (5) for cracks with the gaps larger than or equal to 0.2mm, performing crack pouring treatment by using epoxy resin glue. And then uniformly coating resin glue on the bottom layer on the exposed surfaces of the side wall and the bottom of the beam by using a roller brush, and curing the resin glue 6 on the bottom layer to form a smooth surface. And then uniformly smearing epoxy resin impregnating glue on the cured bottom resin 6 by using a roller brush, pasting carbon fiber cloth, rolling the carbon fiber cloth back and forth by using the roller during pasting, injecting glue into a needle cylinder for repairing if hollowing occurs, ensuring that the plumpness of an effective pasting surface is 100%, and finally coating a fireproof coating on the carbon fiber cloth.
As an optimized solution of the embodiment of the present invention, the finishing treatment further includes that the beam support hogging moment section 21 is subjected to roughening treatment, and the surface of the reinforced concrete beam coated with the epoxy resin steel adhesive is a clean flat surface.
As an optimized scheme of the embodiment of the invention, the positions of the existing steel bars of the beam body and the column body are detected before the steel bar planting holes are drilled, so that the positions of the steel bar planting holes are kept away from the existing steel bars.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a repair structure for damaging type frame roof beam which characterized in that: the concrete beam column cast-in-place plate node assembly is connected with the damaged frame beam to be repaired, oblique cracks of beam ends of beam supports at negative bending moment sections of beam supports are symmetrically arranged according to one sixth of beam spans at the positions of the beam ends, the U-shaped steel is connected with the concrete beam column cast-in-place plate node assembly, and the CFRP cloth is transversely adhered to the beam middle positive bending moment acting sections to form cracks.
2. A repair construction for a damaged frame beam according to claim 1, characterized in that: the U-shaped steel plate is formed by welding the steel plates at two sides of the beam of the damaged frame beam to be repaired and the steel plate at the bottom of the beam of the damaged frame beam to be repaired.
3. A repair construction for a damaged frame beam according to claim 2, characterized in that: the steel plates on the two side edges of the beam are provided with through bolts, the steel plate at the bottom of the beam is provided with bar planting bolts, and the two bolts are fastened through nuts.
4. A repair construction for a damaged frame beam according to claim 3, characterized in that: first row bolt hole and second row bolt hole have been seted up respectively on the side that U shaped steel board and reinforced concrete roof beam link to each other and the bottom, first row bolt hole passes to wearing the bolt by the nut is fixed, second row bolt hole by the planting bar bolt is implanted the back by the nut is fixed, the bolt hole of roof beam bottom steel sheet by the planting bar bolt is implanted the back by the nut is fixed.
5. A repair construction for a damaged frame beam according to claim 2, characterized in that: the concrete beam column cast-in-place plate node assembly comprises a cast-in-place plate, an intersected frame beam, a concrete column, a reinforced steel plate and a column body steel plate, wherein the reinforced steel plate is welded with the beam bottom steel plate, the column body steel plate is provided with column body embedded steel bar bolts, and a reinforced plate is arranged at the intersection of the beam end lower part and the column.
6. A repair construction for a damaged frame beam according to claim 1, characterized in that: and structural adhesive is poured between the U-shaped steel plate and the damaged frame beam to be repaired, and a grouting hole and an exhaust hole are formed in the joint of the U-shaped steel plate and the concrete surface.
7. A repair construction for a damaged frame beam according to claim 1, characterized in that: and the CFRP cloth is bonded on the position of the crack of the beam middle positive bending moment action section through resin.
8. A repairing method for a damaged frame beam is characterized by comprising the following steps:
s1, trimming the damaged frame beam to be repaired,
s2, after finishing the repair, forming a U-shaped steel plate by the existing structure of the damaged frame beam to be repaired, and symmetrically arranging the U-shaped steel plate at the position where the beam end oblique crack appears in the beam support hogging moment section according to one sixth of the beam span,
s3, connecting the concrete beam column cast-in-place plate node assembly with the damaged frame beam to be repaired, connecting the concrete beam column cast-in-place plate node assembly with the U-shaped steel plate,
and S4, transversely sticking CFRP cloth at the position where the crack appears in the beam middle positive bending moment action section of the damaged frame beam to be repaired.
9. A repairing method for a damaged frame girder according to claim 8, wherein: the specific finishing treatment mode is as follows: the method comprises the following steps of polishing an original cylindrical surface or an original beam surface to be flat by using a handheld electric grinding wheel, grinding small round corners on the periphery of a column and at the corner parts of the beam, brushing bristles by using a steel wire brush, blowing clean by using compressed air, then cleaning the bottom of a concrete surface of a concrete column reinforcing area of a damaged frame beam to be repaired and a concrete beam-column cast-in-place plate node assembly, after treatment, repairing, pressing and leveling the surface which is not flat and a weathered surface by using a pick-and-chisel method, then repairing, pressing and leveling by using polymer mortar, and wiping the adhered surface by using a degreasing cotton ball and acetone.
10. A repair construction for damaged frame beams according to claim 8, wherein: the post body steel sheet of cast-in-place board node assembly of concrete beam column is attached in post round angle department all around after the rust cleaning, and steel sheet stitch welding back all around, the U shaped steel sheet after will removing the rust is attached on roof beam both sides limit steel sheet and beam bottom steel sheet, and the drilling position of the damage type frame roof beam of treating the restoration is looked for again, marks the hole core point, drills and carries out the pore-forming clearance on the surface, fixes U shaped steel sheet behind the pore-forming position bar planting bolt, and right U shaped steel sheet with the post body steel sheet welds, welds the stiffening plate of beam column juncture again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210156611.XA CN114562118A (en) | 2022-02-21 | 2022-02-21 | Repairing structure and method for damaged frame beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210156611.XA CN114562118A (en) | 2022-02-21 | 2022-02-21 | Repairing structure and method for damaged frame beam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114562118A true CN114562118A (en) | 2022-05-31 |
Family
ID=81714699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210156611.XA Pending CN114562118A (en) | 2022-02-21 | 2022-02-21 | Repairing structure and method for damaged frame beam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114562118A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115217362A (en) * | 2022-06-22 | 2022-10-21 | 中国电力工程顾问集团东北电力设计院有限公司 | Nondestructive repair reinforcing method and device for single-shear connection node of angle steel tower |
-
2022
- 2022-02-21 CN CN202210156611.XA patent/CN114562118A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115217362A (en) * | 2022-06-22 | 2022-10-21 | 中国电力工程顾问集团东北电力设计院有限公司 | Nondestructive repair reinforcing method and device for single-shear connection node of angle steel tower |
| CN115217362B (en) * | 2022-06-22 | 2024-04-30 | 中国电力工程顾问集团东北电力设计院有限公司 | Nondestructive repair reinforcing method and reinforcing device for single-shear connection node of angle steel pole tower |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105625197A (en) | Concrete beam bending reinforcing method based on steel plate-prestressed carbon fiber plate | |
| WO2020186757A1 (en) | Ultra-high-performance concrete combined permanent template and application thereof | |
| CN102587681B (en) | Building reinforced structure and reinforcing method | |
| CN206408544U (en) | A kind of hardened system for lifting concrete structure bearing capacity | |
| CN105756365B (en) | A kind of method of rapid reinforcement beams of concrete | |
| CN111705650B (en) | UHPC beam slab cast-in-place joint structure with embedded reinforced steel component and construction method thereof | |
| CN107304634A (en) | A kind of high strength stainless steel silk screen strengthens ECC reinforced concrete structures | |
| CN107013040A (en) | The construction method of floor is poured after a kind of sleeve built-in type | |
| CN106702914A (en) | Reinforcing system capable of improving load bearing capacity of concrete structures and construction method of reinforcing system | |
| CN106088657B (en) | Reinforcing structure of empty bucket wall and construction method thereof | |
| CN114562118A (en) | Repairing structure and method for damaged frame beam | |
| CN203129623U (en) | Composite strengthening structure for building | |
| CN104100100B (en) | The method of Tests of Reinforced Concrete Beams Strengthened With Cfrp-laminate is drawn in micro-varicose | |
| CN110593600A (en) | Beam-slab reinforcing structure of existing building and construction method | |
| CN210086084U (en) | Reinforced structure of assembled reinforced concrete plate girder bridge | |
| CN202483200U (en) | Building reinforcing structure | |
| CN104831642A (en) | Construction method for reinforcing concrete plate girder bridge through corrugated sheet steel | |
| CN117646635A (en) | Prefabricated corrugated steel plate-UHPC combined structure reinforced shield tunnel lining structure and manufacturing method | |
| CN217461586U (en) | A repair structure for damaging type frame roof beam | |
| CN211114954U (en) | Beam slab reinforcing structure of existing building | |
| CN209244580U (en) | A kind of high-bearing capacity shield tunnel segment joint structure | |
| CN112065090A (en) | Reinforcing system for improving bending resistance bearing capacity of concrete structure and construction method | |
| CN221072336U (en) | Bridge external prestress reinforcing structure | |
| CN220059011U (en) | Steel-basalt fiber and steel plate composite reinforced concrete beam column node | |
| CN110965700A (en) | Steel-concrete composite beam connected by adopting studs, epoxy mortar and bolts |
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 |