CN114319109B - Bonding type clamp for FRP (fiber reinforced Plastic) component and mounting method thereof - Google Patents
Bonding type clamp for FRP (fiber reinforced Plastic) component and mounting method thereof Download PDFInfo
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- CN114319109B CN114319109B CN202111444745.3A CN202111444745A CN114319109B CN 114319109 B CN114319109 B CN 114319109B CN 202111444745 A CN202111444745 A CN 202111444745A CN 114319109 B CN114319109 B CN 114319109B
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- sleeve
- frp
- clamp
- cavity
- clamp sleeve
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- 238000000034 method Methods 0.000 title claims abstract description 9
- 229920002430 Fibre-reinforced plastic Polymers 0.000 title description 55
- 239000011151 fibre-reinforced plastic Substances 0.000 title description 55
- 238000004873 anchoring Methods 0.000 claims abstract description 24
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 24
- 230000000452 restraining effect Effects 0.000 claims description 10
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims 1
- 230000001070 adhesive effect Effects 0.000 claims 1
- 238000001125 extrusion Methods 0.000 abstract description 5
- 238000010008 shearing Methods 0.000 abstract description 5
- 230000002457 bidirectional effect Effects 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 3
- 210000002435 tendon Anatomy 0.000 description 4
- 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
- 239000000463 material Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 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
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Landscapes
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a bonding type clamp of FRP components 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 anchoring agent, and the cylinder body of the fixture sleeve is provided with an 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; a connecting sleeve for connecting cross member, the cover is established and is installed in clamp sleeve's stack shell outside. The middle part of the inner cavity of the clamp sleeve is provided with a groove, and the double inner conical cavities with small middle parts and large two ends enable the clamp sleeve to realize bidirectional sliding constraint on FRP ribs (ropes) through anchoring agents; the extension cylinder of the inner village rubber sleeve at the two ends of the clamp sleeve adopts a variable cross-section design, so that gentle and excessive rigidity is realized, 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 a bonding type clamp for FRP (fiber reinforced plastic) members and an installation method thereof.
Background
The fiber reinforced composite material (FRP) represented by the carbon fiber composite material (CFRP) has the excellent performances of light weight, high strength, corrosion resistance, fatigue resistance and the like, is a novel high-performance structural material, often has ultrahigh tensile strength, is manufactured into a tension-only guy cable, 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 string beam structure) and a cable bridge. However, the connection difficulty between the FRP rib (rope) and the transverse member is great, and the clamp needs to be specially designed. The clamp of the traditional steel strand (cable) is often fixed in the middle of the steel strand (cable) through transverse clamping force, but the FRP is low in transverse compressive strength and shearing strength and weak in bending resistance, and the FRP rib (cable) is extremely easily damaged due to overlarge transverse extrusion force and abrupt rigidity, so that the FRP rib (cable) is damaged at the clamp.
Disclosure of Invention
The invention provides a bonding clamp for FRP components and an installation method thereof, which can effectively reduce shearing and extrusion damage of the FRP ribs (ropes) at the end parts of the clamp caused by stress concentration, thereby improving the capability of resisting transverse force.
In order to achieve the above object, the present invention provides a bonding jig for FRP members, comprising:
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 the cylinder body of the fixture sleeve is provided with an 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 cylinder body of the clamp sleeve.
Preferably, the middle part of the cavity is narrower than the two ends, and a plurality of grooves with triangular cross sections are arranged in the middle part of the cavity.
Preferably, the filling hole is positioned at the middle part of the cavity, and the air outlet holes are positioned at the 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 a straight cylinder, the outer wall of the extension cylinder is conical, and one end with a larger section is provided with external threads matched with the threads of the inner wall of the clamp sleeve
Preferably, the outer wall of the clamp sleeve is provided with threads and is matched with two constraint nuts.
Preferably, the inner wall of the connecting sleeve is in a straight cylinder shape, and the inner diameter of the connecting sleeve is matched with the outer wall of the clamp sleeve and is limited between the two restraining nuts.
Preferably, the FRP component is an FRP rib rope formed by a single FRP rib or a plurality of FRP ribs.
Preferably, the connecting sleeve is formed by assembling two assemblies with semicircular sections through high-strength bolts.
Preferably, the two end parts of the cavity are provided with straight cylinder type clamping grooves, positioning rings are clamped in the clamping grooves, and a center hole matched with the FRP component in size is formed in the center of each positioning ring.
In order to achieve the above object, a second aspect of the present invention provides a bonding jig mounting method of an FRP member, comprising the steps of:
providing a bonding jig of the FRP member as described above;
sleeving the clamp sleeve at a corresponding position of the FRP component;
The two ends of the clamp sleeve are provided with the extension cylinder, and the lining rubber sleeve of the extension cylinder is contacted with the surface of the FRP component;
Injecting an anchoring agent into the cavity of the clamp sleeve through the injection hole, and extruding the anchoring agent from the air outlet hole to fill the cavity with the anchoring agent;
After the anchoring agent is solidified, the connecting sleeve is sleeved and installed outside the clamp sleeve, and the connecting sleeve is connected with the transverse member.
By adopting the technical scheme, the invention has the technical effects that:
1) The middle part of the inner cavity of the clamp sleeve is provided with a groove, and the double inner conical cavities with small middle parts and large two ends enable the clamp sleeve to realize bidirectional sliding constraint on FRP ribs (ropes) through anchoring agents;
2) The extension cylinders of the inner village rubber sleeves at the two ends of the clamp sleeve adopt a variable cross-section design, so that gentle and excessive rigidity is realized, shearing and extrusion damage of FRP ribs (cables) at the end parts of the clamp due to stress concentration can be effectively reduced, and the capability of resisting transverse force is improved;
3) By adjusting the positions of the two restraining nuts, an 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 of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a sectional view of a bonding jig for FRP members of example 1 of the present invention.
FIG. 2 is a cross-sectional view taken at 1-1 of FIG. 1.
Fig. 3 is a cross-sectional view of the clamp sleeve in embodiment 1 of the present invention.
Fig. 4 is a cross-sectional view of the extension cylinder in example 1 of the present invention.
Fig. 5 is a cross-sectional view of a retaining ring according to embodiment 1 of the present invention.
Fig. 6 is a cross-sectional view of the transverse connecting sleeve in embodiment 1 of the present invention.
Fig. 7 is a sectional view of a bonding jig for FRP members of 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 the transverse connecting sleeve of embodiment 2 of the present invention before assembly.
Fig. 10 is a sectional view of the transverse connecting sleeve in embodiment 2 of the present invention after assembly.
Fig. 11 is a sectional view of a bonding jig for FRP members of example 3 of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-2, the present embodiment provides a bonding type clamp for FRP members and a method for installing the same, 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 a FRP rib rope 10' (see figure 11) formed by a plurality of FRP ribs, preferably carbon fiber ribs (CFRP ribs), and the problem that the FRP ribs (ropes) are difficult to connect with the transverse member is solved. The bonding FRP rib (cable) clamp mainly comprises a clamp sleeve 11, two extension barrels 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 type clamp suitable for FRP tendons includes a clamp sleeve 11, two extension cylinders 12, a transverse connection sleeve 13, two restraining nuts 14, and an anchor 15.
Specifically, a cavity is formed in the fixture sleeve 11, the middle of the cavity is small, two ends of the cavity are large, a plurality of grooves 110 with triangular cross sections are formed in the middle of the cavity, an filling hole 111 and an air outlet 112 are formed in a cylinder body of the fixture sleeve respectively, and external threads and internal threads are formed on two sides of the outer wall and the inner wall of the fixture sleeve 11 respectively. The width at the middle part of the cavity in the clamp sleeve 11 is larger than the diameter of the FRP rib 10 to be clamped, a space for filling the anchoring agent 15 is formed, straight cylinder clamping grooves 113 are respectively arranged at the end parts of the two ends of the cavity and used for clamping the inherent positioning ring 114, and a center hole matched with the FRP rib 10 in size is formed in the center of the positioning ring 114 and used for positioning the FRP rib 10. In this embodiment, the filling hole 111 is located in the middle of the cavity and is located on the lower cylinder wall of the clamp sleeve 11, and the two air outlets 112 are respectively located at two ends of the cavity and are located on the upper cylinder wall of the clamp sleeve 11 and on the inner side of the positioning ring 114.
The inner walls of the two extension cylinders 12 are straight cylinders, the outer walls are conical, the outer surfaces of the ends with larger sections are provided with external threads, the external threads are matched with the threads of the inner walls on the two sides of the clamp sleeve 11, and the inner surfaces of the extension cylinders 12 are provided with rubber sleeves 121 which are matched with the FRP ribs 10 in size.
Two restraining nuts 14 are threadedly engaged with the outer wall of the clamp sleeve 11 for restraining the transverse connecting sleeve 13 between the two restraining nuts 14.
The inner wall of the connecting sleeve 13 is a straight cylinder, 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 restraining nuts 13. One side of the connecting sleeve 13 is provided with a lug plate 131, and the lug plate 131 is provided with a shaft hole 132 for connecting a transverse member such as a transverse rod in a net rope structure.
When in use, the clamp sleeve 11 is sleeved outside the FRP rib 10, the two positioning rings 114 are respectively arranged at the two ends of the clamp sleeve 11, and an anchoring agent 15 is filled between the clamp sleeve 11 and the FRP rib 10. The double inner conical cavities with the grooves 110 in the middle and the small middle and the large two ends enable the clamp sleeve 11 to realize bidirectional sliding constraint on the FRP rib 10 through the anchoring agent 15; the extension barrels 12 of the inner village rubber sleeves 121 at the two ends of the clamp sleeve 11 adopt a variable cross-section design, so that smooth transition of rigidity is realized, 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 restraining nuts 14, an adjustment of the position of the transverse connection sleeve 13 can be achieved.
The invention also provides a method for installing the bonding clamp of the FRP member in the embodiment 1, which comprises the following specific steps:
1. The outer surface of the corresponding position of the FRP rib 10 provided with the clamp according to the design requirement is subjected to rough treatment (such as sanding);
2. The clamp sleeve 11 is sleeved at the corresponding position of the FRP rib 10, and the two ends of the clamp sleeve are respectively positioned at the positions of the FRP rib 10 through the positioning rings 114;
3. The two ends of the clamp sleeve 11 are respectively provided with an extension cylinder 12, and a lining rubber sleeve 121 of the extension cylinder 12 is tightly contacted with the surface of the FRP component 10;
4. The anchoring agent 15 is injected into the cavity of the clamp 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 fully filled in the clamp sleeve 11, and then curing is performed.
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 adopting 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 that: the transverse connection sleeve 13 may be modified to a fabricated configuration. Specifically, the transverse connection sleeve 13 is changed to be assembled from two members 133 by means of the high strength bolts 134, so that the transverse connection sleeve can be installed after the anchors at both end portions of the FRP tendon 10 are installed (or installed at the time of construction).
Example 3:
as shown in fig. 11, the difference from embodiments 1 and 2 is that: the clamped FRP member may be an FRP tendon rope 10' composed of a plurality of FRP tendons.
None of the inventions are related to the same or are capable of being practiced in the prior art. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. An adhesive jig for FRP members, comprising:
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 the cylinder body of the fixture sleeve is provided with an 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, rubber sleeves matched with the FRP component in size are arranged on the inner surface of the extension cylinder, threads are arranged on two sides of the inner wall of the clamp sleeve, the inner wall of the extension cylinder is a straight cylinder, the outer wall of the extension cylinder is conical, and external threads matched with the threads of the inner wall of the clamp sleeve are arranged at one end with a larger section;
the connecting sleeve is used for connecting the transverse member and sleeved outside the cylinder body of the clamp sleeve;
the middle part of the cavity is narrower than the two ends, and a plurality of grooves with triangular cross sections are formed in the middle part of the cavity;
The filling hole is positioned in the middle of the cavity and is positioned on the cylinder wall below the clamp sleeve, and the air outlet holes are positioned at the two ends of the cavity and are positioned on the inner sides of the cylinder wall above the clamp sleeve and the positioning ring.
2. The bonding jig for FRP members as claimed in claim 1, wherein: the outer wall of the clamp sleeve is provided with threads and two constraint nuts are matched with the threads.
3. The bonding jig for FRP members as claimed in claim 2, 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 restraining nuts.
4. The bonding jig for FRP members as claimed in claim 1, wherein: the FRP component is an FRP rib rope formed by a single FRP rib or a plurality of FRP ribs.
5. The bonding jig for FRP members as claimed in claim 1, wherein: the connecting sleeve is formed by assembling two assembly parts with semicircular sections through high-strength bolts.
6. The bonding jig for FRP members as claimed in claim 1, wherein: the two end parts of the cavity are provided with straight cylinder type clamping grooves, positioning rings are fixedly clamped in the clamping grooves, and the centers of the positioning rings are provided with center holes matched with the FRP component in size.
7. A method for installing an adhesion type clamp of an FRP member is characterized by comprising the steps of:
Providing a bonding jig for FRP members as claimed in any one of claims 1 to 6;
sleeving the clamp sleeve at a corresponding position of the FRP component;
The two ends of the clamp sleeve are provided with the extension cylinder, and the lining rubber sleeve of the extension cylinder is contacted with the surface of the FRP component;
Injecting an anchoring agent into the cavity of the clamp sleeve through the injection hole, and extruding the anchoring agent from the air outlet hole to fill the cavity with the anchoring agent;
After the anchoring agent is solidified, the connecting sleeve is sleeved and installed 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 CN114319109A (en) | 2022-04-12 |
| CN114319109B true 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 |
|---|---|
| CN (1) | CN114319109B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| CN104234325A (en) * | 2014-09-22 | 2014-12-24 | 郑州大学 | Novel FRP rib adhesive type anchorage device with screw plug and mounting method of anchorage device |
| CN104831871A (en) * | 2015-05-21 | 2015-08-12 | 中冶建筑研究总院有限公司 | Connector for connecting FRR (Fiber-reinforced Plastic) rib material and connecting method |
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| CN207227955U (en) * | 2017-09-04 | 2018-04-13 | 中交武汉港湾工程设计研究院有限公司 | A kind of knotted rope vibration absorber |
| 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
Patent Citations (11)
| 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 |
| CN202627330U (en) * | 2012-06-15 | 2012-12-26 | 威胜利工程有限公司 | Inhaul cable anchoring system |
| CN202866126U (en) * | 2012-10-24 | 2013-04-10 | 上海启鹏工程材料科技有限公司 | FRP (fiber-reinforced plastic) rib connection device and anchor rod |
| CN104234325A (en) * | 2014-09-22 | 2014-12-24 | 郑州大学 | Novel FRP rib adhesive type anchorage device with screw plug and mounting method of anchorage device |
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| Publication number | Publication date |
|---|---|
| CN114319109A (en) | 2022-04-12 |
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