CN102787730A - Direct shearing type reinforcing assembly - Google Patents
Direct shearing type reinforcing assembly Download PDFInfo
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- CN102787730A CN102787730A CN201210290563XA CN201210290563A CN102787730A CN 102787730 A CN102787730 A CN 102787730A CN 201210290563X A CN201210290563X A CN 201210290563XA CN 201210290563 A CN201210290563 A CN 201210290563A CN 102787730 A CN102787730 A CN 102787730A
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- crab
- expansion sleeve
- bolt
- reinforcing
- reinforcing plate
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Abstract
The invention provides a direct shearing type reinforcing assembly. The direct shearing type reinforcing assembly comprises a reinforcing plate and an anchor bolt pair, wherein the reinforcing plate is close to the components needing reinforcing; the anchor bolt pair is used for fixedly connecting the reinforcing plate with the components needing reinforcing; the anchor bolt pair comprises an anchor bolt, an expansion sleeve and an anchoring nut; the expansion sleeve is of a split structure formed by at least two semicylinders, and the expansion sleeve is matched with the anchor bolt through a conical pair and is sleeve out the anchor bolt; and the expansion sleeve is pressed into a connecting hole of the reinforcing plate through the anchoring nut screwed on the anchor bolt, and the external circle of the expansion sleeve is tightly matched with the connecting hole through an expansion way under the action of the conical pair. In the invention, the components needing reinforcing are used as supports of the anchor bolt, thus providing effective constraint for strengthening reinforcing assembly; the anchor bolt directly bears shearing action; the reinforcing plate directly participates in the stressing of the components, so the actions of the reinforcing plate can be completely exerted; the reinforcing quality and the reliability are high; and all anchor bolts and the reinforcing plate can jointly immediately participate in stressing in the overload stress process after the component reinforcing, so that the rigidity and the bearing capacity of the reinforced components can be reliably improved by a large margin.
Description
Technical field
The invention belongs to civil structure engineering field, particularly a kind of direct shearing type reinforcement assembly.
Background technology
Concrete component need be reinforced owing to a variety of causes.Though there are various reinforcement means, all there is limitation separately in every kind of method.Concrete increasing section reinforcing method can influence the member outward appearance, and reduction structure clear height increases dead load, and the construction trouble, to disturbing greatly with the structure function of use; Pasting fibrous composite reinforces limited to the element bearing capacity increase rate; Common stickup carbon fiber board is because the influence of secondary loading, crack, amount of deflection and stripping damage; Under the normal operating condition 5% of the common not enough normal intensity of stress of carbon fiber board; Make the carbon fiber composite wood can not give full play to its due effect, rigidity improves very little, and the high strength of material is difficult to effective performance; Though the affixing steel plate reinforcement method can effectively improve element bearing capacity, is easy to take place stripping damage; Common anchor ties and connects steel plate owing to have the gap between steel plate hole and the crab-bolt, causes the stressed hysteresis of steel plate, and rigidity improves limited.Simultaneously, pasting the fiber composite material and have common fatal shortcoming with affixing steel plate reinforcement, is exactly processing quality and the sticking Quality that too relies on the concrete base aspect, and cementing agent all can not prevent fires, even all is restricted in the use of the temperature environment more than 60 ℃.
Therefore; Need a kind of device that is used for strengthening member; Can overcome all shortcomings of concrete increasing section reinforcing method, fiber composite material reinforcing method, affixing steel plate reinforcement method, can give full play to the effect of reinforcing plate, and improve the reliability of strengthening quality greatly.
Summary of the invention
In view of this; The purpose of this invention is to provide a kind of direct shearing type reinforcement assembly, can overcome concrete increasing section reinforcing method, fiber composite material reinforcing method, affixing steel plate reinforcement method and common anchor and tie all shortcomings that connect steel plate, can give full play to the effect of reinforcing plate; The strengthening quality reliability is high; In the overload loading process of crab-bolt behind strengthening member, can be immediately together get involved stressedly, the rigidity and the bearing capacity that are reinforced member can be increased substantially reliably with reinforcing plate.
Direct shearing type reinforcement assembly of the present invention; Comprise and be close to the reinforcing plate that needs strenthening member and will reinforce the crab-bolt pair that plate is fixedly connected on needs strenthening member; Said crab-bolt pair comprises crab-bolt, expansion sleeve and anchoring nut; Serve as reasons split-type structural that two halves cylinder at least forms and be coated at crab-bolt through secondary cooperation of the conical surface of said expansion sleeve with crab-bolt, said expansion sleeve through be spun on anchoring nut on the crab-bolt and be pressed into the connecting hole of reinforcing plate and under the effect of the conical surface pair cylindrical of expansion sleeve cooperate with the connecting hole swelling.
Further, said conical surface pair comprises that the crab-bolt cylindrical is provided with interior big outer little male cone (strobilus masculinus) and inner conical surface that with male cone (strobilus masculinus) cooperate identical with the male cone (strobilus masculinus) tapering with the interior circle that is arranged at expansion sleeve;
Further, said need strenthening member be concrete component, and said reinforcing plate is close to surface of concrete structure;
Further, the outside bending of expansion sleeve outboard end forms spacing annular boss;
Further, said reinforcing plate is a steel plate, and said steel plate is fixedly connected through the crab-bolt pair and is close to needs the strenthening member surface; Perhaps, steel plate with need between the strenthening member surface bonding and be fixedly connected through bonding agent through the crab-bolt pair;
Further, the said expansion sleeve split-type structural that two halves cylinder at least forms of serving as reasons, the two halves cylinder receive force direction to be combined to form expansion sleeve side by side along steel plate.
The invention has the beneficial effects as follows: direct shearing type reinforcement assembly of the present invention, adopt the expansion sleeve structure and make the expansion sleeve swelling in the connecting hole of reinforcing plate through conical surface pair, eliminate radial clearance; And because the setting of expansion sleeve; Crab-bolt and nut thereof and reinforcing plate are not directly had an effect, and make that reinforcing plate does not influence it and need the state that is adjacent between the strenthening member when reinforcing, after the construction; When reinforcing plate and under the component internal force effect, produce slippage with respect to need strenthening member surface; Because do not have assemblage gap between connecting hole, expansion sleeve and the crab-bolt of reinforcing plate, as the fulcrum to crab-bolt, crab-bolt is directly born shear action with need strenthening member itself; It is secondary to form direct shearing type crab-bolt; Provide the effect constraint for strengthening the reinforcing plate, reinforce plate and do not have transition and directly get involved member stress, realize the purpose of effective reinforcing; The present invention can overcome concrete increasing section reinforcing method, fiber composite material reinforcing method, affixing steel plate reinforcement method and common anchor and tie all shortcomings that connect the steel plate reinforcement method; Can give full play to the effect of reinforcing plate; The strengthening quality reliability is higher; In the overload loading process of all crab-bolts behind strengthening member, can be immediately together get involved stressedly, the rigidity and the bearing capacity that are reinforced member can be increased substantially reliably with reinforcing plate.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is further described.
Fig. 1 is a structural representation of the present invention;
Fig. 2 is an expansion sleeve structural representation of the present invention;
Fig. 3 be Fig. 2 along A to view;
Fig. 4 is an installation process sketch map of the present invention;
Fig. 5 is utilization structure figure of the present invention;
Fig. 6 is test principle figure of the present invention;
Fig. 7 is comparison of test results figure.
The specific embodiment
Fig. 1 is a structural representation of the present invention; Fig. 2 is an expansion sleeve structural representation of the present invention; Fig. 3 be Fig. 2 along A to view; Fig. 4 is an installation process sketch map of the present invention; Fig. 5 is utilization structure figure of the present invention, and is as shown in the figure: the direct shearing type reinforcement assembly of present embodiment comprises and is close to the reinforcing plate 1 that needs strenthening member and will reinforces the crab-bolt pair that plate 1 is fixedly connected on needs strenthening member; Said crab-bolt pair comprises crab-bolt 2, expansion sleeve 3 and anchoring nut 4; Serve as reasons split-type structural that two halves cylinder at least forms and be coated at crab-bolt 2 through secondary cooperation of the conical surface of said expansion sleeve 3 with crab-bolt 2, said expansion sleeve 3 through be spun on anchoring nut 4 on the crab-bolt 2 and be pressed into the connecting hole 1a that reinforces plate 1 and under the secondary effect of the conical surface cylindrical of expansion sleeve 3 cooperate with connecting hole 1a swelling, process of press in comprises that crab-bolt moves the expansion sleeve that causes outward and get into process and direct process of press in relatively; Conical surface pair can be to constitute between the circle in interior big outer little male cone (strobilus masculinus) and the expansion sleeve 3 by crab-bolt 2 cylindricals; Also can be that circle is to constitute between interior big outer little inner conical surface and crab-bolt 2 cylindricals in the expansion sleeve 3; Can also be that crab-bolt 2 cylindricals are that circle all can be realized axially being pressed into and the effect of swelling radially for constituting between the interior big outer little inner conical surface that matches with male cone (strobilus masculinus) in the interior big outer little conical surface and the expansion sleeve 3.
In the present embodiment, said conical surface pair comprises that crab-bolt 2 cylindricals are provided with interior big outer little male cone (strobilus masculinus) 2a and inner conical surface 3a that with male cone (strobilus masculinus) 2a cooperate identical with male cone (strobilus masculinus) 2a tapering with the interior circle that is arranged at expansion sleeve 3; In big outer referring in little anchor into direction, refer to the direction that crab-bolt exposes to needs strenthening member outward; Form conical surface pair jointly by inner conical surface 3a and male cone (strobilus masculinus) 2a, make that the expanded radially that produces in expansion sleeve 3 process of press in is even, it is comparatively thorough to eliminate the gap, and lifting surface area is bigger in forming direct shearing power process, has consolidation effect and stability preferably.
In the present embodiment, said need strenthening member be concrete component 6, and said reinforcing plate 1 is close to the surface of concrete component 6; When concrete component 6 bears moment of flexure, shearing, axle power even moment of torsion; As long as think in the design and adhere to steel plate and cooperative bearing just can improve bearing of component in component surface; Secondary that reinforcing plate 1 is got involved immediately is stressed through crab-bolt provided by the invention, demonstrates than prior art reinforcement means excellent characteristic more.
In the present embodiment, the outside bending of expansion sleeve 3 outboard end forms spacing annular boss 3b; This spacing annular boss 3b can accurately control the position of expansion sleeve 3 on the assembly axis, has correspondingly controlled the position of crab-bolt 2 conical surfaces on the assembly axis, makes assembly be in best stress.
In the present embodiment, said reinforcing plate 1 is a steel plate, and said steel plate is fixedly connected and is close to through the crab-bolt pair needs strenthening member 1 surface; Perhaps, steel plate with need between the strenthening member surface bonding and be fixedly connected through bonding agent through the crab-bolt pair; Just steel plate is except that being connected in the strenthening member through direct shearing type crab-bolt pair, can also be connected at auxiliary bonding agent between steel plate and the strenthening member, and it is stressed jointly to make steel plate and concrete beam form integral body.
In the present embodiment, said expansion sleeve 3 is the split-type structural that is formed by the two halves cylinder, and the edge of two halves cylinder receives force direction to be combined to form expansion sleeve 3 side by side; Adopt the Hough formula structure of present embodiment and, can guarantee the reliability of power transmission according to be set up in parallel by force direction.
Crab-bolt 2 of the present invention is installed as follows with steel plate and is connected:
The connecting hole implantation that crab-bolt 2 is passed on the steel plate is reinforced in the concrete beam 6; Expansion sleeve 3 is installed; Make and reserve a little spacing between spacing annular boss 3b and the surface of steel plate, perhaps push against surface of steel plate utilization rotation anchoring nut and make a little outer moving of crab-bolt, make that the conical surface pair between crab-bolt and the expansion sleeve drives expansion sleeve lateral spread displacement; And push against with the connecting hole inwall of steel plate, realize closely contact between connecting hole, expansion sleeve and the crab-bolt three.When the stressed back of steel plate produced slippage with respect to concrete surface, owing to do not have assemblage gap between steel plate and the crab-bolt, crab-bolt was directly born shear action; Form direct shearing type crab-bolt; And, make steel plate get involved member stress for the enhancing steel plate provides operative constraint, realize reinforcing target.
When needs use many crab-bolts 2 to realize being connected between steel plates and the concrete beam 6 (shown in Figure 5), operate as follows.
1. steel plate adopts any reliable temporary measure, keep with the concrete beam surface near, and require not take place relative displacement.
2. see through the connecting hole on the steel plate, adopt rigs such as electric hammer or water brill, in concrete beam basic unit, bore anchor hole, the bore diameter on anchor hole diameter and the steel plate is roughly the same.
3., accomplish tight connection the between crab-bolt 2 and the steel plate by taking root in, and by installation and connection method between aforementioned single crab-bolt and the steel plate into direct shearing type crab-bolt.
Fig. 6 is test principle figure of the present invention; Fig. 7 is comparison of test results figure; As shown in the figure, the consolidation effect of direct shearing type reinforcement assembly is adopted in checking, has carried out being reinforced the contrast test of concrete beam 6 and existing concrete beam; As shown in the figure, be reinforced concrete beam 6 and be set to simply supported beam with the existing concrete beam;
Totally 3 of test beams, load 7 span centre imposed loads, it is identical with existing concrete beam section size and vertical muscle dosage to be reinforced concrete beam 6, and adopts same tank car ready mix concrete to build.The stirrup dosage of reinforcement increases, and is cut the bearing capacity deficiency with what avoid that normal section reinforces the back rest, loads sketch such as Fig. 6; The steel plate that reinforcement uses is Q235, sectional dimension-200X9, direct shearing type crab-bolt specification M20, No. 45 steel of material; Totally 2 of strenthening members, one of them uses direct shearing type crab-bolt to connect fully, another strenthening member after using direct shearing type crab-bolt to connect, pressure injection epoxy resin slurries between strengthening steel slab and reinforcement bottom surface again.As shown in Figure 7; The a curve is the load-span centre displacement curve of contrast beam (prior art); The b curve is the load span centre displacement curve of the reinforcement of the present invention of 20mm crab-bolt, and the c curve is the load-span centre displacement curve (auxiliary bonding agent-epoxy resin slurries) of the reinforcement of the present invention of 20mm crab-bolt; Result of the test shows that two strenthening member bearing capacities improve 120%, and the piece table of infusion epoxy resin slurries has revealed more performance.
Explanation is at last; Above embodiment is only unrestricted in order to technical scheme of the present invention to be described; Although with reference to preferred embodiment the present invention is specified, those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement technical scheme of the present invention; And not breaking away from the aim and the scope of technical scheme of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (6)
1. direct shearing type reinforcement assembly; It is characterized in that: comprise and be close to the reinforcing plate that needs strenthening member and will reinforce the crab-bolt pair that plate is fixedly connected on needs strenthening member; Said crab-bolt pair comprises crab-bolt, expansion sleeve and anchoring nut; Serve as reasons split-type structural that two halves cylinder at least forms and be coated at crab-bolt through secondary cooperation of the conical surface of said expansion sleeve with crab-bolt, said expansion sleeve through be spun on anchoring nut on the crab-bolt and be pressed into the connecting hole of reinforcing plate and under the effect of the conical surface pair cylindrical of expansion sleeve cooperate with the connecting hole swelling.
2. direct shearing type reinforcement assembly according to claim 1 is characterized in that: said conical surface pair comprises that the crab-bolt cylindrical is provided with interior big outer little male cone (strobilus masculinus) and inner conical surface that with male cone (strobilus masculinus) cooperate identical with the male cone (strobilus masculinus) tapering with the interior circle that is arranged at expansion sleeve.
3. direct shearing type reinforcement assembly according to claim 2 is characterized in that: said need strenthening member be concrete component, and said reinforcing plate is close to surface of concrete structure.
4. direct shearing type reinforcement assembly according to claim 3 is characterized in that: the outside bending of expansion sleeve outboard end forms spacing annular boss.
5. direct shearing type reinforcement assembly according to claim 4 is characterized in that: said reinforcing plate is a steel plate, and said steel plate is fixedly connected through the crab-bolt pair and is close to needs the strenthening member surface; Perhaps, steel plate with need between the strenthening member surface bonding and be fixedly connected through bonding agent through the crab-bolt pair.
6. direct shearing type reinforcement assembly according to claim 5 is characterized in that: the said expansion sleeve split-type structural that two halves cylinder at least forms of serving as reasons, the two halves cylinder receive force direction to be combined to form expansion sleeve side by side along steel plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210290563.XA CN102787730B (en) | 2012-08-15 | 2012-08-15 | Direct shearing type reinforcing assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210290563.XA CN102787730B (en) | 2012-08-15 | 2012-08-15 | Direct shearing type reinforcing assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102787730A true CN102787730A (en) | 2012-11-21 |
| CN102787730B CN102787730B (en) | 2015-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210290563.XA Active CN102787730B (en) | 2012-08-15 | 2012-08-15 | Direct shearing type reinforcing assembly |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109267763A (en) * | 2018-11-14 | 2019-01-25 | 中冶建筑研究总院有限公司 | A kind of reinforcement assembly and its application |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3445713A1 (en) * | 1984-12-14 | 1986-06-19 | Hilti Ag, Schaan | SPREADING ANCHOR |
| US5288190A (en) * | 1991-07-18 | 1994-02-22 | Hilti Aktiengesellschaft | Expansion dowel assembly |
| CN2338530Y (en) * | 1998-07-22 | 1999-09-15 | 济南铁路分局泰安工务段 | Dismountable upset bolt |
| CN2751095Y (en) * | 2004-09-23 | 2006-01-11 | 王化君 | Mosaic anchor tie-plate |
| KR20070009272A (en) * | 2005-07-15 | 2007-01-18 | (주)피엔알시스템 | Method for reinforcing concrete structure using nude f.r.p.e of lattice steel fiber plate and nude f.r.p.e of complex rigidity member |
| CN101906850A (en) * | 2010-07-20 | 2010-12-08 | 重庆大学 | Special shearing-resistance anchor bolt pair for anchor group |
-
2012
- 2012-08-15 CN CN201210290563.XA patent/CN102787730B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3445713A1 (en) * | 1984-12-14 | 1986-06-19 | Hilti Ag, Schaan | SPREADING ANCHOR |
| US5288190A (en) * | 1991-07-18 | 1994-02-22 | Hilti Aktiengesellschaft | Expansion dowel assembly |
| CN2338530Y (en) * | 1998-07-22 | 1999-09-15 | 济南铁路分局泰安工务段 | Dismountable upset bolt |
| CN2751095Y (en) * | 2004-09-23 | 2006-01-11 | 王化君 | Mosaic anchor tie-plate |
| KR20070009272A (en) * | 2005-07-15 | 2007-01-18 | (주)피엔알시스템 | Method for reinforcing concrete structure using nude f.r.p.e of lattice steel fiber plate and nude f.r.p.e of complex rigidity member |
| CN101906850A (en) * | 2010-07-20 | 2010-12-08 | 重庆大学 | Special shearing-resistance anchor bolt pair for anchor group |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109267763A (en) * | 2018-11-14 | 2019-01-25 | 中冶建筑研究总院有限公司 | A kind of reinforcement assembly and its application |
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| CN102787730B (en) | 2015-04-29 |
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