CN114319109A - Bonding type jig for FRP member and method for mounting same - Google Patents
Bonding type jig for FRP member and method for mounting same Download PDFInfo
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- CN114319109A CN114319109A CN202111444745.3A CN202111444745A CN114319109A CN 114319109 A CN114319109 A CN 114319109A CN 202111444745 A CN202111444745 A CN 202111444745A CN 114319109 A CN114319109 A CN 114319109A
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- frp
- sleeve
- cavity
- clamp
- bonding type
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- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000004873 anchoring Methods 0.000 claims abstract description 25
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 25
- 238000002347 injection Methods 0.000 claims abstract description 3
- 239000007924 injection Substances 0.000 claims abstract description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims 2
- 235000017491 Bambusa tulda Nutrition 0.000 claims 2
- 241001330002 Bambuseae Species 0.000 claims 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims 2
- 239000011425 bamboo Substances 0.000 claims 2
- 229920002430 Fibre-reinforced plastic Polymers 0.000 abstract description 61
- 239000011151 fibre-reinforced plastic Substances 0.000 abstract description 61
- 238000001125 extrusion Methods 0.000 abstract description 5
- 238000009434 installation Methods 0.000 abstract description 4
- 238000010008 shearing Methods 0.000 abstract description 4
- 230000002457 bidirectional effect Effects 0.000 abstract description 3
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 239000003733 fiber-reinforced composite Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 210000003205 muscle Anatomy 0.000 description 2
- 230000000452 restraining effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
The invention discloses a bonding type clamp of an FRP component and an installation method thereof, wherein the clamp comprises: the fixture sleeve is internally provided with a cavity with the width larger than the diameter of the FRP component, the cavity is filled with an anchoring agent, and a cylinder body of the fixture sleeve is provided with an injection hole and an air outlet hole of the anchoring agent; the extension cylinder is assembled and connected to two ends of the clamp sleeve, and a rubber sleeve matched with the FRP component in size is arranged on the inner surface of the extension cylinder; and the connecting sleeve is used for connecting the transverse member and sleeved outside the barrel body of the clamp sleeve. The middle part of the inner cavity of the fixture sleeve is provided with a groove, and the small middle part and the large two ends of the double-inner conical cavity ensure that the fixture sleeve can realize bidirectional sliding constraint on the FRP (fiber reinforced plastic) ribs (cables) through an anchoring agent; the extension cylinders of the lining rubber sleeves at the two ends of the clamp sleeve adopt a variable cross-section design, so that the rigidity is gentle and excessive, the shearing and extrusion damage of FRP ribs (cables) at the end part of the clamp due to stress concentration can be effectively reduced, and the capability of resisting transverse force is improved.
Description
Technical Field
The invention relates to the field of civil engineering, in particular to an adhesion type clamp of an FRP (fiber reinforced plastic) component and an installation method thereof.
Background
The fiber reinforced composite (FRP) represented by a carbon fiber Composite (CFRP) has excellent performances of light weight, high strength, corrosion resistance, fatigue resistance and the like, is a novel high-performance structural material, is usually ultrahigh in tensile strength, can be made into a tensile cable only by being pulled, can fully exert the tensile strength, and can be used as a main tension member in a large-span space structure (such as a cable net structure and a beam string structure) and a cable bearing bridge. However, the FRP ribs (cables) and the cross members are difficult to connect, and the clamps need to be specially designed. The traditional steel strand (cable) clamp is often fixed in the middle of the steel strand (cable) through transverse clamping force, but because the transverse compressive strength and the shear strength of FRP are low, and the bending resistance is weak, the FRP rib (cable) is easily damaged by overlarge transverse extrusion force and sudden rigidity, so that the FRP rib (cable) is damaged at the clamp.
Disclosure of Invention
In order to solve the problem of connection between an FRP (fiber reinforced plastic) rib (cable) and a transverse member in a cable bearing structure, the invention provides a bonding type clamp of the FRP member and an installation method thereof, which can effectively reduce shearing and extrusion damage of the FRP rib (cable) at the end part of the clamp due to stress concentration, thereby improving the capability of resisting transverse force.
In order to achieve the above object, the present invention provides an adhesion type jig for FRP members, comprising:
the fixture comprises a fixture sleeve, wherein a cavity with the width larger than the diameter of the FRP component is arranged in the fixture sleeve, an anchoring agent is filled in the cavity, and a cylinder body of the fixture sleeve is provided with a filling hole and an air outlet hole of the anchoring agent;
the extension cylinder is assembled and connected to two ends of the clamp sleeve, and a rubber sleeve matched with the FRP component in size is arranged on the inner surface of the extension cylinder;
and the connecting sleeve is used for connecting the transverse member and sleeved outside the barrel body of the clamp sleeve.
Preferably, the middle part of the cavity is narrower than the two ends, and the middle part of the cavity is provided with a plurality of grooves with triangular cross sections.
Preferably, the filling hole is located in the middle of the cavity, and the air outlet hole is located at two ends of the cavity.
Preferably, threads are arranged on two sides of the inner wall of the clamp sleeve, the inner wall of the extension cylinder is in a straight cylinder shape, the outer wall of the extension cylinder is in a conical shape, the end with the larger cross section is provided with an external thread matched with the threads of the inner wall of the clamp sleeve
Preferably, the outer wall of the clamp sleeve is threaded and is threadedly mated with two captive nuts.
Preferably, the inner wall of the connecting sleeve is of a straight cylinder shape, the inner diameter of the connecting sleeve is matched with the outer wall of the clamp sleeve, and the connecting sleeve is limited between the two constraining nuts.
Preferably, the FRP member is an FRP rib cable composed of a single FRP rib or a plurality of FRP ribs.
Preferably, the connecting sleeve is formed by assembling two assembling parts with semicircular cross sections through a high-strength bolt.
Preferably, the end parts of the two ends of the cavity are provided with straight cylindrical clamping grooves, positioning rings are clamped in the clamping grooves, and the centers of the positioning rings are provided with center holes matched with the FRP members in size.
To achieve the above object, a second aspect of the present invention provides an adhesion type jig mounting method of an FRP member, comprising the steps of:
a bonding type jig for providing the FRP member as described above;
sleeving the clamp sleeve at the position corresponding to the FRP component;
installing the extension cylinders at two ends of the clamp sleeve, wherein the lining rubber sleeves of the extension cylinders are in contact with the surface of the FRP component;
injecting an anchoring agent into the cavity of the fixture sleeve through the filling hole, and extruding the anchoring agent out of the air outlet hole to fill the cavity with the anchoring agent;
after the anchoring agent is solidified, the connecting sleeve is sleeved outside the clamp sleeve, and the connecting sleeve is connected with the transverse member.
Due to the adoption of the technical scheme, the invention has the following technical effects:
1) the middle part of the inner cavity of the fixture sleeve is provided with a groove, and the small middle part and the large two ends of the double-inner conical cavity ensure that the fixture sleeve can realize bidirectional sliding constraint on the FRP (fiber reinforced plastic) ribs (cables) through an anchoring agent;
2) the extension cylinders of the lining rubber sleeves at the two ends of the fixture sleeve adopt a variable cross-section design, so that the rigidity is smoothly and excessively increased, the shearing and extrusion damage of FRP ribs (cables) at the end part of the fixture due to stress concentration can be effectively reduced, and the capability of resisting transverse force is improved;
3) by adjusting the position of the two constraining nuts, adjustment of the position of the connecting sleeve of the cross member can be achieved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a sectional view of a bonding jig for an FRP member according to example 1 of the present invention.
Fig. 2 is a cross-sectional view taken at 1-1 of fig. 1.
Fig. 3 is a sectional view of a clip sleeve in embodiment 1 of the present invention.
Fig. 4 is a sectional view of an extension cylinder in example 1 of the present invention.
Fig. 5 is a sectional view of the retaining ring according to embodiment 1 of the present invention.
Fig. 6 is a cross-sectional view of a lateral connecting sleeve in example 1 of the present invention.
Fig. 7 is a sectional view of an adhesion type jig for an FRP member according to example 2 of the present invention.
Fig. 8 is a cross-sectional view taken at 2-2 of fig. 7.
Fig. 9 is a cross-sectional view of a transverse connecting sleeve of example 2 of the present invention prior to assembly.
Fig. 10 is a sectional view of the transverse connecting sleeve of embodiment 2 of the present invention after assembly.
Fig. 11 is a sectional view of an adhesion type jig for an FRP member according to example 3 of the present invention.
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 to 2, the present embodiment provides a bonding type fixture for an FRP member and an installation method thereof, which are particularly suitable for bridge structures and large-span space structures. The FRP (fiber reinforced composite) member can be a single FRP rib 10, or an FRP rib cable 10' (see fig. 11) consisting of a plurality of FRP ribs, and a carbon fiber rib (CFRP rib) is preferred, so that the problem of difficulty in connecting the FRP rib (cable) and the transverse member is solved. The bonding FRP (fiber reinforce Plastic) bar (cable) clamp mainly comprises a clamp sleeve 11, two extension cylinders 12, a transverse connecting sleeve 13, two constraint nuts 14 and an anchoring agent 15, wherein the anchoring agent 15 can be epoxy resin or polymer mortar.
Example 1:
referring to fig. 1 to 6, an embodiment of a bonding fixture for an FRP rib includes a fixture sleeve 11, two extension tubes 12, a transverse connection sleeve 13, two constraint nuts 14, and an anchoring agent 15.
Specifically, a cavity is formed in the fixture sleeve 11, the middle of the cavity is small, the two ends of the cavity are large, the middle of the cavity is provided with a plurality of grooves 110 with triangular cross sections, a filling hole 111 and an air outlet hole 112 are formed in the barrel body of the fixture sleeve, and external threads and internal threads are formed in two sides of the outer wall and two sides of the inner wall of the fixture sleeve 11 respectively. The width at the middle part of the cavity in the clamp sleeve 11 is greater than the diameter of the FRP rib 10 to be clamped, a space for filling the anchoring agent 15 is formed, the end positions of the two ends of the cavity are respectively provided with a straight-cylinder-shaped clamping groove 113 for clamping an inherent positioning ring 114, and the center of the positioning ring 114 is provided with a center hole matched with the size of the FRP rib 10 for positioning the FRP rib 10. In this embodiment, the filling hole 111 is located in the middle of the cavity and located on the lower wall of the fixture sleeve 11, and the two air outlets 112 are located at the two ends of the cavity and located on the inner sides of the upper wall of the fixture sleeve 11 and the positioning ring 114.
The inner walls of the two extension cylinders 12 are straight cylinders, the outer walls of the two extension cylinders are conical, external threads are arranged on the outer surface of the end with the larger cross section and are matched with the threads of the inner walls of the two sides of the clamp sleeve 11, and rubber sleeves 121 inner liners matched with the FRP ribs 10 in size are arranged on the inner surfaces of the extension cylinders 12.
Two captive nuts 14 are threadedly mated with the outer wall of the clamp sleeve 11 for restraining the transverse connection sleeve 13 between the two captive nuts 14.
The inner wall of the connecting sleeve 13 is in a straight cylinder shape, the inner diameter of the connecting sleeve is matched with the outer wall of the clamp sleeve 11, the connecting sleeve is sleeved outside the clamp sleeve 11, and the connecting sleeve is limited between the constraint nuts 13. The connecting sleeve 13 is provided with an ear plate 131 at one side, and the ear plate 131 is inserted into the axle hole 132 for connecting a cross member, such as a cross rod in a net cable structure.
During the use, outside the FRP muscle 10 was located to the anchor clamps sleeve 11 cover, two holding rings 114 were located the anchor clamps sleeve 11 both ends respectively, and it has anchoring agent 15 to fill between anchor clamps sleeve 11 and the FRP muscle 10. The double-inner-conical cavity with the groove 110 in the middle and the small middle and the large two ends enables the fixture sleeve 11 to realize bidirectional sliding constraint on the FRP rib 10 through the anchoring agent 15; the extension cylinders 12 of the lining rubber sleeves 121 at the two ends of the clamp sleeve 11 adopt a variable cross-section design, so that the smooth transition of rigidity is realized, the shearing and extrusion damage of the FRP rib 10 at the end part of the clamp due to stress concentration can be effectively reduced, and the capability of resisting transverse force is improved; by adjusting the position of the two constraining nuts 14, an adjustment of the position of the transverse connection sleeve 13 can be achieved.
The present invention also provides a method for installing the bonding jig for FRP members in embodiment 1, which comprises the following steps:
1. performing rough treatment (such as sanding) on the outer surface of the corresponding position of the FRP rib 10 provided with the clamp according to the design requirement;
2. sleeving the clamp sleeve 11 at the corresponding position of the FRP rib 10, and positioning the position of the FRP rib 10 at two ends through positioning rings 114 respectively;
3. the two ends of the clamp sleeve 11 are respectively provided with an extension tube 12, and the lining rubber sleeve 121 of the extension tube 12 is tightly contacted with the surface of the FRP component 10;
4. the anchoring agent 15 is injected into the cavity of the jig sleeve 11 through the lower injection hole 111 and is extruded from the upper air outlet hole 112, so that the anchoring agent 15 is sufficiently filled in the jig sleeve 11, followed by curing.
5. After the curing and curing of the anchoring agent 15 are completed, the transverse connecting sleeve 13 is sleeved outside the clamp sleeve 11, the connecting sleeve 13 is restrained and positioned by the restraining nut 14, and the lug plate 131 of the connecting sleeve 13 is connected with the transverse member.
Example 2:
as shown in fig. 7 to 10, the difference from embodiment 1 is: the transverse connecting sleeve 13 can be modified to a fitted configuration. Specifically, the transverse connecting sleeve 13 is changed into a form that two parts 133 are assembled through a high-strength bolt 134, so that the transverse connecting sleeve can be installed after the two end anchors of the FRP bar 10 are installed (or installed again during construction).
Example 3:
as shown in fig. 11, the difference from embodiments 1 and 2 is that: the FRP member to be clamped may be an FRP rib 10' composed of a plurality of FRP ribs.
The parts not involved in the present invention are the same as or can be implemented by the prior art. 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. A bonding type jig for FRP members, characterized by comprising:
the fixture comprises a fixture sleeve, wherein a cavity with the width larger than the diameter of the FRP component is arranged in the fixture sleeve, an anchoring agent is filled in the cavity, and a cylinder body of the fixture sleeve is provided with a filling hole and an air outlet hole of the anchoring agent;
the extension cylinder is assembled and connected to two ends of the clamp sleeve, and a rubber sleeve matched with the FRP component in size is arranged on the inner surface of the extension cylinder;
and the connecting sleeve is used for connecting the transverse member and sleeved outside the barrel body of the clamp sleeve.
2. A bonding type jig for FRP members as claimed in claim 1, wherein: the middle part of the cavity is narrower than the two ends, and the middle part of the cavity is provided with a plurality of grooves with triangular cross sections.
3. A bonding type jig for FRP members as claimed in claim 2, wherein: the injection hole is located in the middle of the cavity, and the air outlet holes are located at two ends of the cavity.
4. A bonding type jig for FRP members as claimed in claim 1, wherein: the telescopic inner wall both sides of anchor clamps are equipped with the screw thread, the inner wall of an extension section of thick bamboo is straight cartridge type, the outer wall of an extension section of thick bamboo be the toper and the great one end in cross-section be equipped with the external screw thread that the telescopic inner wall screw thread of anchor clamps matches.
5. A bonding type jig for FRP members as claimed in claim 2, wherein: the outer wall of the clamp sleeve is provided with threads, and the threads are matched with two constraint nuts.
6. A bonding type jig for FRP members as set forth in claim 5, wherein: the inner wall of the connecting sleeve is in a straight cylinder shape, the inner diameter of the connecting sleeve is matched with the outer wall of the clamp sleeve, and the connecting sleeve is limited between the two constraint nuts.
7. A bonding type jig for FRP members as claimed in claim 1, wherein: the FRP component is an FRP rib cable formed by a single FRP rib or a plurality of FRP ribs.
8. A bonding type jig for FRP members as claimed in claim 1, wherein: the connecting sleeve is formed by assembling two assembling parts with semicircular sections through high-strength bolts.
9. A bonding type jig for FRP members as claimed in claim 1, wherein: the end parts of the two ends of the cavity are provided with straight cylindrical clamping grooves, positioning rings are clamped in the clamping grooves, and the centers of the positioning rings are provided with center holes matched with the FRP components in size.
10. A method for installing an FRP member by bonding a jig, comprising the steps of:
providing a bonding type jig of the FRP member as recited in any one of claims 1 to 9;
sleeving the clamp sleeve at the position corresponding to the FRP component;
installing the extension cylinders at two ends of the clamp sleeve, wherein the lining rubber sleeves of the extension cylinders are in contact with the surface of the FRP component;
injecting an anchoring agent into the cavity of the fixture sleeve through the filling hole, and extruding the anchoring agent out of the air outlet hole to fill the cavity with the anchoring agent;
after the anchoring agent is solidified, the connecting sleeve is sleeved outside the clamp sleeve, and the connecting sleeve is connected with the transverse member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111444745.3A CN114319109B (en) | 2021-11-30 | 2021-11-30 | Bonding type clamp for FRP (fiber reinforced Plastic) component and mounting method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111444745.3A CN114319109B (en) | 2021-11-30 | 2021-11-30 | Bonding type clamp for FRP (fiber reinforced Plastic) component and mounting method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114319109A true CN114319109A (en) | 2022-04-12 |
| CN114319109B CN114319109B (en) | 2024-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111444745.3A Active CN114319109B (en) | 2021-11-30 | 2021-11-30 | Bonding type clamp for FRP (fiber reinforced Plastic) component and mounting method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN114319109B (en) |
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| CN201217890Y (en) * | 2008-06-05 | 2009-04-08 | 黑龙江宇辉新型建筑材料有限公司 | Nested grouting reinforced steel coupling sleeve |
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| CN108797898A (en) * | 2018-08-08 | 2018-11-13 | 西南科技大学 | Composite connector and its assemble method for FRP tendons |
| CN210713531U (en) * | 2019-04-02 | 2020-06-09 | 南通四建集团有限公司 | Portable prestressed anchorage spare |
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2021
- 2021-11-30 CN CN202111444745.3A patent/CN114319109B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090041017A (en) * | 2007-10-23 | 2009-04-28 | 한국건설기술연구원 | Anchorage apparatus for frp tendon by sleeve with opening and installation method of the same |
| CN201217890Y (en) * | 2008-06-05 | 2009-04-08 | 黑龙江宇辉新型建筑材料有限公司 | Nested grouting reinforced steel coupling sleeve |
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| CN114319109B (en) | 2024-05-10 |
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