CN113738151A - Method for reinforcing RC beam by using FRP-UHPC composite board in shearing resistance mode - Google Patents
Method for reinforcing RC beam by using FRP-UHPC composite board in shearing resistance mode Download PDFInfo
- Publication number
- CN113738151A CN113738151A CN202111079513.2A CN202111079513A CN113738151A CN 113738151 A CN113738151 A CN 113738151A CN 202111079513 A CN202111079513 A CN 202111079513A CN 113738151 A CN113738151 A CN 113738151A
- Authority
- CN
- China
- Prior art keywords
- frp
- uhpc
- uhpc composite
- reinforced concrete
- composite board
- 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.)
- Withdrawn
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
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/07—Reinforcing elements of material other than metal, e.g. of glass, of plastics, or not exclusively made of metal
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
- E04G23/0244—Increasing or restoring the load-bearing capacity of building construction elements of beams at places of holes, e.g. drilled in them
-
- 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
- E04G2023/0251—Increasing or restoring the load-bearing capacity of building construction elements by using fiber reinforced plastic elements
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
The invention provides a method for reinforcing an RC beam by using an FRP-UHPC composite board in a shearing mode, which relates to the technical field of civil engineering structure reinforcement, and comprises the following steps: step 1, manufacturing an FRP-UHPC composite board; and 2, mounting the FRP-UHPC composite board on the side surface of the reinforced concrete beam. The invention improves the shearing bearing capacity of the reinforced concrete beam, shortens the construction period, reduces the interference to the surrounding environment, reduces the later maintenance cost and has beneficial technical effects.
Description
Technical Field
The invention relates to the technical field of civil engineering structure reinforcement, in particular to a method for reinforcing a Reinforced Concrete (RC) beam in a shearing mode by using a fiber composite reinforced material (FRP) -ultra-high performance concrete (UHPC) composite plate.
Background
In the field of civil engineering, concrete materials are widely used, but the concrete materials have the defects of low tensile strength, poor crack resistance and the like. Problems of geological exploration errors, design and calculation errors, poor construction quality and the like can occur in the process of constructing a Reinforced Concrete (RC) building; in the using process, the improper behaviors of changing house purposes such as blind floor adding, partition wall adding, random damage to a bearing structure and the like often occur. All of the above factors result in a reduction in the load bearing capacity of the RC structure. The reinforced concrete beam is an important bearing and force-transmitting component in a building structure, and the reduction of the shearing bearing force seriously affects the safety and normal use of the building.
The existing shear-resistant reinforcing method of the reinforced concrete beam comprises an externally-adhered steel plate, an externally-adhered FRP, an embedded FRP, an externally-adhered ECC layer and the like, and the methods have certain limitations more or less. If the steel plate method is externally attached, the bearing capacity of the reinforced concrete beam can be effectively improved, but the defects of easy corrosion, high later maintenance cost and the like exist; the bearing capacity of the reinforced concrete beam can be effectively improved by externally attaching and embedding FRP reinforcement, but when the member deforms under stress, the FRP is easy to peel off at the end part, and the stability of structural adhesive is poor; the ECC reinforcement can effectively improve the bearing capacity and durability of the reinforced concrete beam, but the ECC material has lower elastic modulus and smaller deformation constraint on the concrete beam. Therefore, there is a need for a safe, efficient and economically feasible method of reinforcing the shear capacity of a reinforced concrete beam.
Therefore, the invention provides a method for reinforcing the RC beam by using the FRP-UHPC composite plate in a shearing mode, so that the shearing resistance of the reinforced concrete beam is improved.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a method for shearing resistance and reinforcement of a reinforced concrete beam by using an FRP-UHPC composite plate.
The invention provides a method for reinforcing an RC beam by using an FRP-UHPC composite board in a shearing mode, which comprises the following steps:
and 2, mounting the FRP-UHPC composite board on the side surface of the reinforced concrete beam.
In the invention, FRP refers to a fiber reinforced composite material, UHPC refers to ultra-high performance concrete, UHPC board refers to an ultra-high performance concrete board, and FRP-UHPC composite board refers to an ultra-high performance concrete board provided with fiber reinforced composite material ribs.
The side surface of the reinforced concrete beam refers to a surface which is parallel to the length direction and vertical to the supporting surface when the reinforced concrete beam is installed.
Further, the step 1 specifically includes: and manufacturing a UHPC plate, and configuring FRP ribs in the UHPC plate to manufacture the FRP-UHPC composite plate.
Preferably, the UHPC plate comprises cement, silica fume, quartz powder, quartz sand, a water reducing agent and steel fibers, wherein the compressive strength of the UHPC plate is not lower than 120MPa, the content of the steel fibers is 2% -3%, the length of the steel fibers is 10-20mm, and the diameter of the steel fibers is 0.1-0.25 mm.
The content of steel fibers refers to volume ratio.
Further, the step 1 specifically includes: determining the shape and size of the FRP-UHPC composite board and the quantity, diameter and distribution of the FRP ribs according to the size, reinforcement and stress conditions of the reinforced concrete beam to be reinforced; determining the position of a preformed hole of the FRP-UHPC composite board according to the position of a steel bar of the reinforced concrete beam; then, a template is made, cylindrical foam is placed at the position of the reserved hole, and the mixed UHPC material is injected into the template for molding and curing.
Preferably, the FRP-UHPC composite board is rectangular, the thickness of the FRP-UHPC composite board is 30-80mm, the width of the FRP-UHPC composite board is consistent with the height of the reinforced concrete beam, and the length of the FRP-UHPC composite board is not more than 1.5 m; the diameter of the FRP ribs is 8-20mm, the FRP ribs are arranged in the FRP-UHPC composite board in a single-layer centered manner, and the distance between the FRP ribs is not more than 150 mm; the preformed holes are arranged in parallel in two rows in the width direction of the FRP-UHPC composite board, and the distance in the length direction of the FRP-UHPC composite board is not more than 500 mm.
The shape of the FRP-UHPC composite board is consistent with the shape of the side face of the reinforced concrete beam, and the shape of the manufactured FRP-UHPC composite board is generally rectangular according to the shape of the reinforced concrete beam. The length of the FRP-UHPC composite board is determined according to the shear span ratio, and the length of a single FRP-UHPC composite board is not more than 1.5 m.
The quantity of the FRP ribs is determined according to the calculation result of the bearing capacity, the FRP ribs are arranged in a single layer in the thickness direction in the FRP-UHPC composite board, and the distance between every two adjacent FRP ribs is not more than 150 mm. The FRP ribs are not less than 10mm thick relative to the protective layer on the side face of the FRP-UHPC composite board, and not less than 15mm thick relative to the protective layer on the end part.
The preformed hole is used for installing the split bolt, and after the position of the preformed hole is determined, the cylindrical foam corresponding to the size of the preformed hole is placed at the position of the preformed hole, and then pouring is carried out. The aperture of the prepared hole is 16mm, and the hole edge distance is not less than 100 mm.
Further, when the shear span ratio of the reinforced concrete beam is less than 1, the direction of the FRP rib is consistent with the length direction of the FRP-UHPC composite board; and when the shear span ratio of the reinforced concrete beam is not less than 1, the direction of the FRP rib is consistent with the width direction of the FRP-UHPC composite board.
Further, the step 2 specifically includes: and adhering the FRP-UHPC composite board to the side surface of the reinforced concrete beam by using a binder, and then mechanically anchoring the FRP-UHPC composite board and the reinforced concrete beam by using a split bolt and a U-shaped hoop.
Preferably, the binder is a UHPC material blend.
Further, the step 2 specifically includes: drilling holes in the reinforced concrete beam at the mounting positions of the split bolts, and cleaning the reinforced concrete beam by using an air pump; then, smearing the adhesive on the side surface of the reinforced concrete beam, and adhering the FRP-UHPC composite board; and finally, mechanically anchoring the FRP-UHPC composite board by using the U-shaped hoop and the split bolt.
The drilling position on the reinforced concrete beam is matched with the position of a preformed hole on the FRP-UHPC composite board.
Preferably, the width of the U-shaped hoop is 50mm, and the diameter of the split bolt is 14 mm; the span of the U-shaped hoop and the length of the split bolt are respectively matched with the sum of the width of the reinforced concrete beam and the thickness of the FRP-UHPC composite plate.
The U-shaped hoops and the split bolts are made of common steel, and the positions of each group of U-shaped hoops and the split bolts are determined according to the positions of the preformed holes on the FRP-UHPC composite board. The span of the U-shaped hoop and the length of the split bolt are determined according to the thicknesses of the reinforced concrete beam and the FRP-UHPC composite plate, and the span of the U-shaped hoop refers to the distance between two arms of the U-shaped hoop. The U-shaped hoop and the split bolt are subjected to rust prevention treatment before use.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the method for reinforcing the shear resistance of the reinforced concrete beam by using the FRP-UHPC composite plate, the UHPC material and the FRP are combined, the performance is complementary, the high strength, the high toughness and the high durability are realized, the shear strength of the reinforced concrete beam can be effectively improved, the durability of the reinforced concrete beam can be improved, and the later maintenance cost is reduced.
2. The method for reinforcing the shear resistance of the reinforced concrete beam by using the FRP-UHPC composite board provided by the invention has the advantages that the FRP-UHPC composite board is reinforced by adopting a prefabricated processing mode and an assembly mode, the construction period is short, the environmental interference is small, and the application range is wide.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic view of an FRP-UHPC composite plate provided by an embodiment of the invention for reinforcing a reinforced concrete beam in a shearing manner;
FIG. 2 is a schematic diagram of an FRP-UHPC composite panel provided by an embodiment of the invention;
FIG. 3 is a schematic view of FRP ribs in an FRP-UHPC composite panel according to an embodiment of the invention;
FIG. 4 is another schematic view of FRP ribs in an FRP-UHPC composite panel according to an embodiment of the invention;
FIG. 5 is a side view of a split bolt and a U-shaped hoop anchored FRP-UHPC composite panel according to an embodiment of the invention;
fig. 6 is a schematic structural view of a U-shaped hoop according to an embodiment of the present invention.
In the figure:
1-a reinforced concrete beam;
2-FRP-UHPC composite board;
3-FRP ribs;
4-split bolts;
5-U-shaped hoop.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
As shown in fig. 1, which is an overall schematic view of the FRP-UHPC composite plate of the present invention for shear reinforcement of a reinforced concrete beam, the FRP-UHPC composite plate 2 is adhered to two side surfaces of the reinforced concrete beam 1, and at the same time, mechanical anchoring is performed between the FRP-UHPC composite plate 2 and the reinforced concrete beam 1 through a U-shaped hoop 5 and a tie bolt 4 at the side surface of the reinforced concrete beam 1.
As shown in fig. 2, 3 and 4, the FRP-UHPC composite panel 2 is a rectangular panel, the FRP ribs 3 are disposed in the FRP-UHPC composite panel 2 along the length or width direction, and the FRP ribs 3 are disposed in the middle of the FRP-UHPC composite panel 2 in a single layer in the thickness direction.
The FRP refers to a fiber reinforced composite material, the UHPC refers to ultra-high performance concrete, the UHPC board refers to an ultra-high performance concrete board, and the FRP-UHPC composite board refers to the ultra-high performance concrete board provided with fiber reinforced composite material ribs.
As shown in fig. 6, the U-shaped hoop 5 has bolt holes for mounting the split bolts 4, which are provided on both side arms of the U-shaped hoop 5.
The side view of the reinforced concrete beam 1, the FRP-UHPC composite panel 2, the split bolts 4 and the U-shaped hoops 5 after assembly is shown in fig. 5.
The invention provides a method for reinforcing a reinforced concrete beam by using an FRP-UHPC composite plate in a shearing mode, which comprises the following steps:
and 2, mounting the FRP-UHPC composite board 2 on the side surface of the reinforced concrete beam 1.
Specifically, step 1 comprises: and (3) manufacturing a UHPC plate, and arranging FRP ribs 3 in the UHPC plate to manufacture the FRP-UHPC composite plate 2.
The UHPC plate is made of cement, silica fume, quartz powder, quartz sand, a water reducing agent and steel fibers, wherein the compressive strength of the UHPC plate is not lower than 120MPa, the content of the steel fibers is 2-3%, the length of the steel fibers is 10-20mm, and the diameter of the steel fibers is 0.1-0.25 mm. The content of steel fibers refers to volume ratio.
Specifically, step 1 further comprises: determining the shape and size of the FRP-UHPC composite board and the quantity, diameter and distribution of the FRP ribs according to the size, reinforcement and stress conditions of the reinforced concrete beam to be reinforced; determining the position of a preformed hole of the FRP-UHPC composite board according to the position of a steel bar of the reinforced concrete beam; then, a template is made, cylindrical foam is placed at the position of the reserved hole, and the mixed UHPC material is injected into the template for molding and curing.
The prepared hole is used for installing the split bolt 4, and after the position of the prepared hole is determined, cylindrical foam corresponding to the size of the prepared hole can be placed at the position of the prepared hole and then pouring is carried out.
The preformed holes are arranged in two rows in parallel in the width direction of the FRP-UHPC composite board 2, and the distance in the length direction of the FRP-UHPC composite board 2 is not more than 500 mm. The aperture of the prepared hole is 16mm, and the hole edge distance is not less than 100 mm.
The thickness of the FRP-UHPC composite board 2 is 30-80mm, and the diameter of the FRP rib 3 is 8-20 mm; the FRP rib 3 is arranged in the middle of a single layer in the FRP-UHPC composite board 2.
According to the shape of the reinforced concrete beam 1, the manufactured FRP-UHPC composite board 2 is generally rectangular, the width of the FRP-UHPC composite board 2 is consistent with the height of the reinforced concrete beam 1, the length is determined according to the shear span ratio, and the length of a single FRP-UHPC composite board 2 is not more than 1.5 m.
The quantity of the FRP ribs 3 is determined according to the calculation result of the bearing capacity, and the FRP ribs 3 are arranged in a single layer in the thickness direction in the FRP-UHPC composite board 2. The FRP ribs 3 are not less than 10mm thick relative to the protective layer thickness of the side face of the FRP-UHPC composite board 2, and not less than 15mm thick relative to the protective layer thickness of the end part.
As shown in fig. 2 and 3, when the shear span ratio of the reinforced concrete beam 1 is less than 1, the direction of the FRP rib 3 is consistent with the length direction of the FRP-UHPC composite board 2; when the shear span ratio of the reinforced concrete beam 1 is not less than 1, the direction of the FRP rib 3 is consistent with the width direction of the FRP-UHPC composite board 2.
The distance between the adjacent FRP ribs 3 is not more than 150 mm.
Specifically, step 2 comprises: the FRP-UHPC composite board 2 is adhered to the side surface of the reinforced concrete beam 1 by using an adhesive, and then the FRP-UHPC composite board 2 and the reinforced concrete beam 1 are mechanically anchored by using a tension bolt 4 and a U-shaped hoop 5.
The binder may be a UHPC material blend.
Specifically, step 2 further comprises: drilling the reinforced concrete beam 1 at the mounting position of the split bolt 4, and cleaning the beam by using an air pump; then, smearing a binder on the side surface of the reinforced concrete beam 1, and sticking an FRP-UHPC composite board 2; finally, the FRP-UHPC composite board 2 is mechanically anchored by using the U-shaped hoop 5 and the split bolt 4.
The drilling position on the reinforced concrete beam 1 is matched with the position of a preformed hole on the FRP-UHPC composite board 2.
The width of the U-shaped hoop 5 is 50mm, and the diameter of the split bolt 4 is 14 mm.
The U-shaped hoops 5 and the split bolts 4 are made of common steel, and the positions of each group of U-shaped hoops 5 and the split bolts 4 are determined according to the positions of the preformed holes on the FRP-UHPC composite board 2. The span of the U-shaped hoop 5 and the length of the split bolt 4 are determined according to the thicknesses of the reinforced concrete beam 1 and the FRP-UHPC composite plate 2, and the U-shaped hoop 5 and the split bolt 4 are subjected to rust prevention treatment before use.
Example 1
The invention particularly discloses a method for shearing resistance and reinforcement of a reinforced concrete beam by using an FRP-UHPC composite plate.
The length, the height and the width of the reinforced concrete beam 1 are 3000mm, 500mm and 250mm, the span-center concentrated loading is carried out, the shear-span ratio is 3, namely the length of a shear span area is 1500 mm.
The length multiplied by the width multiplied by the thickness of the FRP-UHPC composite board 2 is 1500mm multiplied by 500mm multiplied by 30mm, and holes with the diameter of 16mm are reserved at the four corners of the FRP-UHPC composite board 2, as shown in figure 2.
The UHPC used in this example had a steel fiber content of 2%, a length of 13mm and a diameter of 0.2 mm.
In this embodiment, the shear span ratio of the concrete beam is 3, and a mode of vertically arranging the FRP ribs 3 is selected, as shown in fig. 3. Through analysis, the configuration of the FRP rib 3 is 10mm @150mm (namely the diameter is 10mm, the distance is 150mm), the thickness of the protective layer on the side surface of the FRP rib 3 is 10mm, and the thickness of the protective layer on the end part is 15 mm.
In the embodiment, before the FRP-UHPC composite board 2 is installed, opposite-penetrating holes are drilled at corresponding positions of a reinforced concrete beam 1, and an air pump is used for cleaning; then, the concrete beam surface is washed by a high-pressure water gun to remove scum and dust.
In this embodiment, the FRP-UHPC composite board 2 is adhered to the side surface of the reinforced concrete beam 1, and the used binder is a UHPC material mixture. Firstly, a layer of UHPC material stirring material with the thickness of 5mm is evenly smeared on the side surface of the beam, the FRP-UHPC composite board 2 is pasted and evenly pressed until bubbles are extruded and the composite board is flat. Then, the split bolt 4 and the U-shaped hoop 5 are assembled, and finally, the nut of the split bolt 4 is tightly attached to the composite plate by using a torque wrench, and the installation is completed as shown in fig. 1, and the cross-sectional structure is shown in fig. 5.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (10)
1. A method for reinforcing an RC beam by using an FRP-UHPC composite plate in a shearing mode is characterized by comprising the following steps:
step 1, manufacturing an FRP-UHPC composite board;
and 2, mounting the FRP-UHPC composite board on the side surface of the reinforced concrete beam.
2. The method for shear reinforcing the RC beam by using the FRP-UHPC composite plate according to claim 1, wherein the step 1 specifically comprises the following steps: and manufacturing a UHPC plate, and configuring FRP ribs in the UHPC plate to manufacture the FRP-UHPC composite plate.
3. The method for shear reinforcement of the RC beam by using the FRP-UHPC composite plate according to claim 2, wherein the material of the UHPC plate comprises cement, silica fume, quartz powder, quartz sand, a water reducing agent and steel fibers, the compressive strength of the UHPC plate is not lower than 120MPa, the content of the steel fibers is 2% -3%, the length of the steel fibers is 10-20mm, and the diameter of the steel fibers is 0.1-0.25 mm.
4. The method for shear reinforcing the RC beam by using the FRP-UHPC composite plate according to claim 2, wherein the step 1 specifically comprises the following steps: determining the shape and size of the FRP-UHPC composite board and the quantity, diameter and distribution of the FRP ribs according to the size, reinforcement and stress conditions of the reinforced concrete beam to be reinforced; determining the position of a preformed hole of the FRP-UHPC composite board according to the position of a steel bar of the reinforced concrete beam; then, a template is made, cylindrical foam is placed at the position of the reserved hole, and the mixed UHPC material is injected into the template for molding and curing.
5. The method for shear reinforcement of the RC beam by using the FRP-UHPC composite plate according to claim 4, wherein the FRP-UHPC composite plate is rectangular, the thickness of the FRP-UHPC composite plate is 30-80mm, the width of the FRP-UHPC composite plate is consistent with the height of the reinforced concrete beam, and the length of the FRP-UHPC composite plate is not more than 1.5 m; the diameter of the FRP ribs is 8-20mm, the FRP ribs are arranged in the FRP-UHPC composite board in a single-layer centered manner, and the distance between the FRP ribs is not more than 150 mm; the preformed holes are arranged in parallel in two rows in the width direction of the FRP-UHPC composite board, and the distance in the length direction of the FRP-UHPC composite board is not more than 500 mm.
6. The method for shear-reinforcing the RC beam by using the FRP-UHPC composite plate according to claim 5, wherein when the shear-span ratio of the reinforced concrete beam is less than 1, the direction of the FRP ribs is consistent with the length direction of the FRP-UHPC composite plate; and when the shear span ratio of the reinforced concrete beam is not less than 1, the direction of the FRP rib is consistent with the width direction of the FRP-UHPC composite board.
7. The method for shear reinforcing the RC beam by using the FRP-UHPC composite plate according to claim 1, wherein the step 2 specifically comprises the following steps: and adhering the FRP-UHPC composite board to the side surface of the reinforced concrete beam by using a binder, and then mechanically anchoring the FRP-UHPC composite board and the reinforced concrete beam by using a split bolt and a U-shaped hoop.
8. The method for shear reinforcing the RC beam by using the FRP-UHPC composite plate according to claim 7, wherein the adhesive is UHPC material stirrer.
9. The method for shear reinforcing the RC beam by using the FRP-UHPC composite plate according to claim 7, wherein the step 2 specifically comprises the following steps: drilling holes in the reinforced concrete beam at the mounting positions of the split bolts, and cleaning the reinforced concrete beam by using an air pump; then, smearing the adhesive on the side surface of the reinforced concrete beam, and adhering the FRP-UHPC composite board; and finally, mechanically anchoring the FRP-UHPC composite board by using the U-shaped hoop and the split bolt.
10. The method for shear reinforcing the RC beam by using the FRP-UHPC composite plate according to claim 7, wherein the width of the U-shaped hoop is 50mm, and the diameter of the split bolt is 14 mm; the span of the U-shaped hoop and the length of the split bolt are respectively matched with the sum of the width of the reinforced concrete beam and the thickness of the FRP-UHPC composite plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111079513.2A CN113738151A (en) | 2021-09-15 | 2021-09-15 | Method for reinforcing RC beam by using FRP-UHPC composite board in shearing resistance mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111079513.2A CN113738151A (en) | 2021-09-15 | 2021-09-15 | Method for reinforcing RC beam by using FRP-UHPC composite board in shearing resistance mode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113738151A true CN113738151A (en) | 2021-12-03 |
Family
ID=78738972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111079513.2A Withdrawn CN113738151A (en) | 2021-09-15 | 2021-09-15 | Method for reinforcing RC beam by using FRP-UHPC composite board in shearing resistance mode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113738151A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220178158A1 (en) * | 2020-12-07 | 2022-06-09 | Fuzhou University | Device and method for reinforcing round section wood beam by combination of prestressed frp sheet and high strength steel wire rope |
| CN116163470A (en) * | 2023-02-22 | 2023-05-26 | 上海应用技术大学 | FRP reinforced UHPC board shear-resistant reinforced concrete beam and installation method thereof |
-
2021
- 2021-09-15 CN CN202111079513.2A patent/CN113738151A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220178158A1 (en) * | 2020-12-07 | 2022-06-09 | Fuzhou University | Device and method for reinforcing round section wood beam by combination of prestressed frp sheet and high strength steel wire rope |
| US11674323B2 (en) * | 2020-12-07 | 2023-06-13 | Fuzhou University | Device and method for reinforcing round section wood beam by combination of prestressed FRP sheet and high strength steel wire rope |
| CN116163470A (en) * | 2023-02-22 | 2023-05-26 | 上海应用技术大学 | FRP reinforced UHPC board shear-resistant reinforced concrete beam and installation method thereof |
| CN116163470B (en) * | 2023-02-22 | 2024-05-17 | 上海应用技术大学 | FRP reinforced UHPC board shear-resistant reinforced concrete beam and installation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108442514B (en) | Assembly type flexible concrete frame node structure with additional hidden damper | |
| Mukhopadhyaya et al. | Optimizing structural response of beams strengthened with GFRP plates | |
| CN104878948B (en) | A kind of reinforcement means of rc-frame-beam hogging moment area | |
| CN113738151A (en) | Method for reinforcing RC beam by using FRP-UHPC composite board in shearing resistance mode | |
| WO2021205993A1 (en) | Gypsum-based bearing surface material for wooden building, bearing wall structure, and bearing wall construction method | |
| Pardeshi et al. | Review of various shear connectors in composite structures | |
| McKenna et al. | Strengthening of reinforced concrete flexural members using externally applied steel plates and fibre composite sheets—A survey | |
| Nordin | Fibre reinforced polymers in civil engineering: flexural strengthening of concrete structures with prestressed near surface mounted CFRP rods | |
| CN113738150A (en) | Method for improving bending strength of existing reinforced concrete beam | |
| JP2022165931A (en) | Reinforcement structure for concrete columnar body | |
| JP3880738B2 (en) | Reinforcement method of concrete structure by cement mortar composite board with carbon fiber sheet | |
| KR101013088B1 (en) | Shear reinforcing method and bending and shear simultaneously reinforcing method of a concrete structure | |
| KR20190073298A (en) | Reinforced structural system for secure seismic performance by reinforcing existing bricks walls | |
| US7246473B2 (en) | Anchorage system for structural reinforcement of fiber reinforced plastic materials and the like | |
| Al-Salloum et al. | Rehabilitation of the infrastructure using composite materials: overview and applications | |
| JP2004011226A (en) | Repair panel | |
| CN209891381U (en) | Building structure | |
| Hoepfner et al. | Experimental investigations of shallow mechanical and bonded anchors in textile reinforce concrete | |
| JP5356010B2 (en) | Foundation reinforcement structure | |
| CN111395566A (en) | Combined energy dissipation shock attenuation strutting arrangement of chevron shape assembled | |
| CN111021773A (en) | Method for reinforcing residential building with concrete frame structure for civil construction | |
| JP5664000B2 (en) | Method for improving reinforcement performance of floor slab and structure for improving reinforcement performance | |
| Joyklad et al. | Experimental Response of Jacketed RC Beams | |
| Ataei et al. | Cyclic behaviour of shear connectors in steel-timber composite beams | |
| JP5525884B2 (en) | Reinforcement joint structure and method for constructing the joint 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 | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20211203 |
|
| WW01 | Invention patent application withdrawn after publication |