CN102787730B - Direct shearing type reinforcing assembly - Google Patents
Direct shearing type reinforcing assembly Download PDFInfo
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- CN102787730B CN102787730B CN201210290563.XA CN201210290563A CN102787730B CN 102787730 B CN102787730 B CN 102787730B CN 201210290563 A CN201210290563 A CN 201210290563A CN 102787730 B CN102787730 B CN 102787730B
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- expansion sleeve
- crab
- 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 due to a variety of causes need reinforce.Although there is various reinforcement means, all there is respective limitation in often kind of method.Concrete increasing section reinforcing method can affect component outward appearance, and reduction structure clear height, increases dead load, and construction trouble, to disturbing greatly with structure using function; Pasting fibrous composite reinforces limited to element bearing capacity increase rate, common sticking carbon fiber plate is due to the impact of secondary loading, crack, amount of deflection and stripping damage, under normal operating condition the usual not enough normal intensity of the stress of carbon fiber board 5%, make carbon fiber composite 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 affixing steel plate reinforcement method effectively can improve element bearing capacity, be easy to stripping damage occurs; Common anchor bolts steel plate, owing to there is gap between steel plate hole and crab-bolt, causes steel plate stressed delayed, and rigidity improves limited.Meanwhile, stickup fiber composite material and affixing steel plate reinforcement have common fatal defects, and be exactly the Disposal quality and the sticking Quality that too rely on concrete base layer face, and cementing agent all can not be prevented fires, the temperature environment even more than 60 DEG C uses and is all restricted.
Therefore, need a kind of device for strengthening member, all shortcomings of concrete increasing section reinforcing method, fiber composite material reinforcing method, affixing steel plate reinforcement method can be overcome, the effect of reinforcing plate can be given full play to, and greatly improve the reliability of strengthening quality.
Summary of the invention
In view of this, the object of this invention is to provide a kind of direct shearing type reinforcement assembly, all shortcomings of concrete increasing section reinforcing method, fiber composite material reinforcing method, affixing steel plate reinforcement method and common anchor bolts steel plate can be overcome, the effect of reinforcing plate can be given full play to, strengthening quality reliability is high, in the overload loading process of crab-bolt after strengthening member, can together get involved stressed with reinforcing plate immediately, the rigidity and the bearing capacity that make to be reinforced component can reliably increase substantially.
Direct shearing type reinforcement assembly of the present invention, comprising being close to needs the reinforcing plate of strenthening member and is fixedly connected on reinforcing plate the crab-bolt pair needing strenthening member, described crab-bolt pair comprises crab-bolt, expansion sleeve and anchoring nut, described expansion sleeve is the split-type structural that formed by least two halves cylinder and is coordinated by conical surface pair with crab-bolt to be coated at crab-bolt, described expansion sleeve by be spun on the anchoring nut press-in reinforcing plate in crab-bolt connecting hole and under the effect of the conical surface pair cylindrical of expansion sleeve coordinate with connecting hole swelling.
Further, described conical surface pair comprises crab-bolt cylindrical and is provided with interior large outer little male cone (strobilus masculinus) and that with male cone (strobilus masculinus) coordinate inner conical surface identical with male cone (strobilus masculinus) tapering with the inner circle being arranged at expansion sleeve;
Further, describedly need strenthening member to be concrete component, surface of concrete structure is close to by described reinforcing plate;
Further, the outside bending of expansion sleeve outboard end forms spacing annular boss;
Further, described reinforcing plate is steel plate, and described steel plate is fixedly connected with by crab-bolt pair and is close to needs strenthening member surface; Or, steel plate with to need between strenthening member surface bonding by bonding agent and be fixedly connected with by crab-bolt pair;
Further, described expansion sleeve is the split-type structural formed by least two halves cylinder, two halves cylinder form expansion sleeve along steel plate Impact direction parallel combinations.
The invention has the beneficial effects as follows: direct shearing type reinforcement assembly of the present invention, adopt expansion sleeve structure and make expansion sleeve swelling in the connecting hole reinforcing plate by conical surface pair, eliminate radial clearance, and due to the setting of expansion sleeve, crab-bolt and nut thereof and reinforcing plate are not directly had an effect, make to reinforce plate do not affect it when reinforcing and need to be adjacent to state between strenthening member, after construction, when reinforcing plate under component internal force effect relative to when needing strenthening member surface to produce slippage, owing to reinforcing the connecting hole of plate, without assemblage gap between expansion sleeve and crab-bolt, to need strenthening member itself as the fulcrum to crab-bolt, crab-bolt directly bears shear action, form direct shearing type crab-bolt secondary, for strengthen plate provides operative constraint, reinforce plate there is not transition and directly get involved member stress, realize the object of effectively reinforcing, the present invention can overcome all shortcomings of concrete increasing section reinforcing method, fiber composite material reinforcing method, affixing steel plate reinforcement method and common anchor bolts steel plate reinforcement method, the effect of reinforcing plate can be given full play to, strengthening quality reliability is higher, in the overload loading process of all crab-bolts after strengthening member, can together get involved stressed with reinforcing plate immediately, the rigidity and the bearing capacity that make to be reinforced component can reliably increase substantially.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is structural representation of the present invention;
Fig. 2 is expansion sleeve structural representation of the present invention;
Fig. 3 is that Fig. 2 is along A direction view;
Fig. 4 is installation process schematic diagram of the present invention;
Fig. 5 is that the present invention uses structure chart;
Fig. 6 is test principle figure of the present invention;
Fig. 7 is comparison of test results figure.
Detailed description of the invention
Fig. 1 is structural representation of the present invention, Fig. 2 is expansion sleeve structural representation of the present invention, Fig. 3 is that Fig. 2 is along A direction view, Fig. 4 is installation process schematic diagram of the present invention, Fig. 5 is that the present invention uses structure chart, as shown in the figure: the direct shearing type reinforcement assembly of the present embodiment, comprising being close to needs the reinforcing plate 1 of strenthening member and is fixedly connected on reinforcing plate 1 the crab-bolt pair needing strenthening member, described crab-bolt pair comprises crab-bolt 2, expansion sleeve 3 and anchoring nut 4, described expansion sleeve 3 is the split-type structural that formed by least two halves cylinder and is coordinated by conical surface pair with crab-bolt 2 to be coated at crab-bolt 2, described expansion sleeve 3 is by being spun on anchoring nut 4 in crab-bolt 2 and being pressed into the connecting hole 1a that reinforces plate 1 and the cylindrical of expansion sleeve 3 coordinating with connecting hole 1a swelling under the effect of conical surface pair, process of press in comprises and moves the expansion sleeve caused outside crab-bolt and relatively enter process and direct process of press in, the conical surface is secondary can be interiorly to form between little male cone (strobilus masculinus) and expansion sleeve 3 inner circle outward greatly by crab-bolt 2 cylindrical, also can be expansion sleeve 3 inner circle be interiorly to be formed between little inner conical surface and crab-bolt 2 cylindrical outward greatly, can also to be crab-bolt 2 cylindrical the be interior large outer little conical surface and expansion sleeve 3 inner circle are form between large outer little inner conical surface in matching with male cone (strobilus masculinus), all can realize axial press-in and the effect of radial swelling.
In the present embodiment, described conical surface pair comprises crab-bolt 2 cylindrical and is provided with interior large outer little male cone (strobilus masculinus) 2a and that with male cone (strobilus masculinus) 2a coordinate inner conical surface 3a identical with male cone (strobilus masculinus) 2a tapering with the inner circle being arranged at expansion sleeve 3; In large outer little in refer to and anchor into direction, refer to crab-bolt outward and expose to the direction needing strenthening member; Jointly form conical surface pair by inner conical surface 3a and male cone (strobilus masculinus) 2a, make the expanded radially that produces in expansion sleeve 3 process of press in even, it is comparatively thorough to eliminate gap, and in formation direct shearing power process, lifting surface area is comparatively large, has good consolidation effect and stability.
In the present embodiment, describedly need strenthening member to be concrete component 6, the surface of concrete component 6 is close to by described reinforcing plate 1; Concrete component 6 bear moment of flexure, shearing, axle power even moment of torsion time, as long as design to be thought at component surface attachment steel plate and cooperative bearing just can improve the bearing capacity of component, just reinforcing plate 1 can be made to get involved immediately by crab-bolt pair provided by the invention stressed, demonstrate the characteristic more excellent compared with prior art reinforcement means.
In the present embodiment, the outside bending of expansion sleeve 3 outboard end forms spacing annular boss 3b; This spacing annular boss 3b accurately can control the position of expansion sleeve 3 on arrangement axis, correspondingly controls the position of crab-bolt 2 conical surface in assembly on axis, makes assembly be in best stress.
In the present embodiment, described reinforcing plate 1 is steel plate, and described steel plate is fixedly connected with by crab-bolt pair and is close to needs strenthening member 1 surface; Or, steel plate with to need between strenthening member surface bonding by bonding agent and be fixedly connected with by crab-bolt pair; Namely steel plate is except being connected to except strenthening member by direct shearing type crab-bolt pair, auxiliary bonding agent can also be connected, make steel plate and concrete beam form entirety jointly stressed between steel plate with strenthening member.
In the present embodiment, described expansion sleeve 3 is the split-type structural formed by two halves cylinder, two halves cylinder along Impact direction parallel combinations formed expansion sleeve 3; Adopt the Hafu-type structure of the present embodiment and be set up in parallel according to Impact direction, the reliability of power transmission can be ensured.
Crab-bolt 2 of the present invention and steel plate carry out installation as follows and are connected:
Crab-bolt 2 is implanted through the connecting hole on steel plate and is reinforced in concrete beam 6, expansion sleeve 3 is installed, make reserved a little spacing between spacing annular boss 3b and surface of steel plate, or pushing against surface of steel plate utilizes rotation anchoring nut to make crab-bolt move a little outward, the conical surface pair between crab-bolt and expansion sleeve is made to drive expansion sleeve lateral spread displacement, and push against with the connecting hole inwall of steel plate, realize connecting hole, close contact between expansion sleeve and crab-bolt three.When after steel plate is stressed relative to concrete surface produce slippage time, due between steel plate and crab-bolt without assemblage gap, crab-bolt directly bears shear action, form direct shearing type crab-bolt, and provide operative constraint for strengthening steel plate, make steel plate get involved member stress, realize reinforcing target.
When needs use many crab-bolts 2 to realize being connected between steel plate with concrete beam 6 (shown in Fig. 5), operate as follows.
1. steel plate adopts any one reliable temporary measure, keep with concrete beam surface near, and require relative shift not to occur.
2., through the connecting hole on steel plate, adopt the rig such as electric hammer or water drilling, in concrete beam basic unit, bore anchor hole, anchor hole diameter is roughly the same with the bore diameter on steel plate.
3. by taking root in into direct shearing type crab-bolt, and by installation and connection method between aforementioned single crab-bolt and steel plate, complete the compact siro spinning technology between crab-bolt 2 and steel plate.
Fig. 6 is test principle figure of the present invention, Fig. 7 is comparison of test results figure, as shown in the figure, checking adopts the consolidation effect of direct shearing type reinforcement assembly, carry out the contrast test being reinforced concrete beam 6 and existing concrete beam, as shown in the figure, concrete beam 6 is reinforced and existing concrete beam is set to simply supported beam;
Test beam totally 3, load 7 span centre imposed load, is reinforced concrete beam 6 identical with vertical muscle dosage with existing concrete beam section size, and adopts same tank car ready mix concrete to build.The stirrup dosage of reinforcement increases, and with the shear resistance capacity deficiency avoiding normal section to reinforce the back rest, loads sketch as Fig. 6; The steel plate that reinforcement uses is Q235, sectional dimension-200X9, direct shearing type crab-bolt specification M20, material No. 45 steel; Strenthening member totally 2, one of them uses direct shearing type anchor bolts completely, another strenthening member after use direct shearing type anchor bolts, then between strengthening steel slab and reinforcement bottom surface pressure injection epoxy resin slurries.As shown in Figure 7, a curve is the load-span centre displacement curve of contrast beam (prior art), b curve is the load span centre displacement curve of the reinforcement of the present invention of 20mm crab-bolt, and 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, two strenthening member bearing power increase 120%, and the component of infusion epoxy resin slurries shows better performance.
What finally illustrate is, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (5)
1. a direct shearing type reinforcement assembly, it is characterized in that: comprising being close to needs the reinforcing plate of strenthening member and be fixedly connected on reinforcing plate the crab-bolt pair needing strenthening member, described crab-bolt pair comprises crab-bolt, expansion sleeve and anchoring nut, described expansion sleeve is the split-type structural that formed by least two halves cylinder and is coordinated by conical surface pair with crab-bolt to be coated at crab-bolt, described expansion sleeve by be spun on the anchoring nut press-in reinforcing plate in crab-bolt connecting hole and under the effect of the conical surface pair cylindrical of expansion sleeve coordinate with connecting hole swelling; Described conical surface pair comprises crab-bolt cylindrical and is provided with interior large outer little male cone (strobilus masculinus) and that with male cone (strobilus masculinus) coordinate inner conical surface identical with male cone (strobilus masculinus) tapering with the inner circle being arranged at expansion sleeve; In large outer little in refer to and anchor into direction.
2. direct shearing type reinforcement assembly according to claim 1, is characterized in that: describedly need strenthening member to be concrete component, and surface of concrete structure is close to by described reinforcing plate.
3. direct shearing type reinforcement assembly according to claim 1, is characterized in that: the outside bending of expansion sleeve outboard end forms spacing annular boss.
4. direct shearing type reinforcement assembly according to claim 1, is characterized in that: described reinforcing plate is steel plate, and described steel plate is fixedly connected with by crab-bolt pair and is close to needs strenthening member surface; Or, steel plate with to need between strenthening member surface bonding by bonding agent and be fixedly connected with by crab-bolt pair.
5. direct shearing type reinforcement assembly according to claim 1, is characterized in that: described expansion sleeve is the split-type structural formed by least two halves cylinder, and cylinder forms expansion sleeve along steel plate Impact direction parallel combinations.
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 |
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| Publication Number | Publication Date |
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| CN102787730A CN102787730A (en) | 2012-11-21 |
| CN102787730B true CN102787730B (en) | 2015-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210290563.XA Active CN102787730B (en) | 2012-08-15 | 2012-08-15 | Direct shearing type reinforcing assembly |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
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| CN102787730A (en) | 2012-11-21 |
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