CN204435925U - Reinforced concrete beam affixing steel plate pressurization fastening devices - Google Patents
Reinforced concrete beam affixing steel plate pressurization fastening devices Download PDFInfo
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- CN204435925U CN204435925U CN201420769217.4U CN201420769217U CN204435925U CN 204435925 U CN204435925 U CN 204435925U CN 201420769217 U CN201420769217 U CN 201420769217U CN 204435925 U CN204435925 U CN 204435925U
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Abstract
The utility model discloses a kind of reinforced concrete beam affixing steel plate pressurization fastening devices, comprise the strengthening steel slab (5) that is pasted on and treats reinforcement of rc beam (1) surface and fixing pressure-applying unit in early stage is carried out to strengthening steel slab (5), strengthening steel slab (5) is pasted on by structural adhesive layer (6) to treat reinforcement of rc beam (1) surface, pressure-applying unit is U-shaped, the pressure-applying unit of this U-shaped comprises the bottom compressing strengthening steel slab (5) to be fixed steel part (4) and is positioned at the beam rib fixing steel part (4) both wings in bottom and fix reinforcing bar (2), one end that each beam rib fixes reinforcing bar (2) is fixed steel part (4) by securing member and bottom and is connected, the other end that each beam rib fixes reinforcing bar (2) is fixed on the surface for the treatment of reinforcement of rc beam (1).The utility model structure is simple, and cost is low, and consolidation effect is good, and installation is convenient.
Description
Technical field
The utility model relates to building structure strengthening and Reinforcement Technology of Concrete Structure field, specifically relates to a kind of reinforcement of rc beam fastening devices.
Background technology
In the engineering structuress such as all types of industries and civilian construction, structure, bridge, culvert and tunnel, concrete structure uses maximum a kind of structures.Due to a variety of causes, aging, damaged, the former design standard as concrete structure is low, and make concrete structural strength (supporting capacity), rigidity can not meet normal instructions for use.Existing concrete structure is reinforced, improves its supporting capacity, extend its application life, become the engineering technology problem widely paid close attention to.
At present, in conventional concrete structure reinforcement method, reinforcement by sticking of sheets and Strengthened By Cfrp Sheet method are widely used, although these two kinds of methods effectively can improve the ultimate bearing capacity in structural deterioration stage, not obvious to the supporting capacity of structure serviceability limit stage and the improvement effect of rigidity.What traditional fastening devices adopted is bottom beam, add a vertical support, and this fastening devices often affects the use of reinforcement lower room, and when adding support, work consuming is consuming time.And other some reinforce methods in often bracing means treating in strenthening member as the permanent reinforcing of a part of strenthening member, so just seem uneconomical.
Utility model content
Technical problem to be solved in the utility model is, overcomes the deficiency and defect mentioned in above background technology, provides that a kind of structure is simple, cost is low, consolidation effect is good, installation reinforced concrete beam affixing steel plate pressurization easily fastening devices.
For solving the problems of the technologies described above, the technical scheme that the utility model proposes is a kind of reinforced concrete beam affixing steel plate pressurization fastening devices, described reinforced concrete beam affixing steel plate pressurization fastening devices comprises the strengthening steel slab that is pasted on and treats reinforcement of rc beam surface and carries out fixing pressure-applying unit in early stage to strengthening steel slab, described strengthening steel slab is pasted on by structural adhesive layer to treat reinforcement of rc beam surface, described pressure-applying unit is U-shaped, the pressure-applying unit of this U-shaped comprises the beam rib fixed steel part and be positioned at the fixing steel part both wings in bottom in the bottom compressing described strengthening steel slab and fixes reinforcing bar, one end that each beam rib fixes reinforcing bar is fixed steel part by securing member and bottom and is connected, the other end that each beam rib fixes reinforcing bar is fixed on the surface for the treatment of reinforcement of rc beam.
In above-mentioned reinforced concrete beam affixing steel plate pressurization fastening devices, preferred: described strengthening steel slab is pasted on the bottom surface for the treatment of reinforcement of rc beam.
In above-mentioned reinforced concrete beam affixing steel plate pressurization fastening devices, preferred: the beam rib of described both wings is fixed reinforcing bar and is individually fixed in and treats on the two sides of reinforcement of rc beam.
In above-mentioned reinforced concrete beam affixing steel plate pressurization fastening devices, preferred: one end that described beam rib fixes reinforcing bar is provided with threaded portion, described securing member is set bolt, and bottom can be fixed steel part to degree of tightness be pressed on described strengthening steel slab by screwing of set bolt.
In above-mentioned reinforced concrete beam affixing steel plate pressurization fastening devices, preferably: the other end that described beam rib fixes reinforcing bar is provided with the hook part of L shape, and by the hook part of this L shape be held in the holddown groove treating that reinforcement of rc beam surface is offered.
In above-mentioned reinforced concrete beam affixing steel plate pressurization fastening devices, preferred: described pressure-applying unit is provided with many groups, and the pressure-applying unit of many groups is distributed in equally spacedly and treats on reinforcement of rc beam.
In above-mentioned reinforced concrete beam affixing steel plate pressurization fastening devices, preferred: it is angle steel that steel part is fixed in described bottom.
As what match with above-mentioned the utility model, the utility model also provides a kind of reinforcement means based on above-mentioned reinforced concrete beam affixing steel plate pressurization fastening devices, comprises the following steps:
A one, () treats that the pre-anchoring of two middle side parts two beam ribs of reinforcement of rc beam fix reinforcing bar;
B () is treating the coated on bottom side brush configuration glue-line of reinforcement of rc beam;
C high-strength strengthening steel slab is pasted onto the bottom surface for the treatment of reinforcement of rc beam by () by structural adhesive layer;
D described bottom is fixed steel part by set bolt and is connected with the bottom that two beam ribs of pre-anchoring fix reinforcing bar by () again, and make the fixing steel part in bottom hold out against described strengthening steel slab;
E () reaches design strength and after the design strength that reinforcement of rc beam reaches required by reinforcing design until the solidification of described structural adhesive layer, put a strengthening steel slab, remove beam rib and fix the pressure-applying unit that steel part composition is fixed in reinforcing bar and bottom, complete reinforcing process.
Above-mentioned reinforcement means, preferred: to fix plug between steel part and described strengthening steel slab in described bottom and add slim timber wedge block, the upwards support force applied further is subject to make strengthening steel slab, and then make strengthening steel slab with treat the bottom surface of reinforcement of rc beam affixed be one overall, and produce one upwards force displacement, after described pressure-applying unit removal strengthening steel slab with treat to produce a prestressing effect in the integrated member that reinforcement of rc beam sticks into.
Above-mentioned the technical solution of the utility model is mainly based on following principle: by treating the high-strength strengthening steel slab of the surface mount of reinforcement of rc beam, and make it to set up prestressing force, with the supporting capacity of Concrete Structure structure, greatly improve rigidity and the crack resistance of concrete structure; Specifically provide a pressure-applying unit at the early stage of strenthening member to strengthening steel slab, after treating structural adhesive layer sclerosis and treating the design strength that reinforcement of rc beam reaches required by reinforcing design, then pressure-applying unit is removed.
Compared with prior art, the utility model has the advantage of:
(1) the utility model is by treating the high-strength strengthening steel slab of the surface mount of reinforcement of rc beam, and makes it to set up prestressing force, and this not only can the supporting capacity of Concrete Structure structure, and greatly can improve the rigidity of concrete structure, crack resistance;
(2) the reinforced concrete beam affixing steel plate pressurization fastening devices that the utility model proposes, a kind of fixed equipment of easy economy is provided to reinforcement of rc beam, prove by experiment, concrete beam structure after reinforcement, can improve the crack resistance of the supporting capacity of structure serviceability limit stage, rigidity and structure greatly;
(3) reinforced concrete beam affixing steel plate pressurization fastening devices of the present utility model more saves beam base space and engineering time than traditional support, than the permanent fixture generally adopted now, it can recycle, and reaches the object of economic environmental protection.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the front view of reinforced concrete beam affixing steel plate pressurization fastening devices in the utility model embodiment.
Fig. 2 is the lateral view of reinforced concrete beam affixing steel plate pressurization fastening devices in the utility model embodiment.
Marginal data:
1, reinforcement of rc beam is treated; 2, beam rib fixes reinforcing bar; 3, set bolt; 4, steel part is fixed in bottom; 5, strengthening steel slab; 6, structural adhesive layer.
Detailed description of the invention
For the ease of understanding the utility model, hereafter will do to describe more comprehensively, meticulously to the utility model in conjunction with Figure of description and preferred embodiment, but protection domain of the present utility model is not limited to following specific embodiment.
It should be noted that, when a certain element is described on " be fixed on, be fixed in, be connected to or be communicated in " another element, it can be directly fixing, affixed, connect or be communicated with on another element, also can be by other intermediate connectors indirectly fixing, affixed, connection or connection on another element.
Unless otherwise defined, hereinafter used all technical terms are identical with the implication that those skilled in the art understand usually.The object of technical term used herein just in order to describe specific embodiment is not be intended to limit protection domain of the present utility model.
Unless otherwise specified, the various raw material used in the utility model etc. are all bought by market and are obtained or prepare by existing method.
Embodiment:
In certain building, a span is the reinforced concrete beam of 8m, and double dielectrics gate, sectional dimension is wide is 250mm, high 600mm, and the moment-curvature relationship born is 240kN.m, and strength grade of concrete is C25, HRB335 reinforcing bar, and bad border classification is I class.This building has come into operation more than 30 year, although through the reinforcement of twice cracking, due to long-time use, add the reason of the aspects such as design, management, maintenance, this beam present situation allows of no optimist, and subject matter outstanding behaviours is in the following aspects:
(1) this reinforced concrete beam to be reinforced used adding early stage gauze wire cloth shotcrete layer is existing and peels off with major part;
(2) the mid-span deflection distortion of this reinforced concrete beam close maximum defluxion reaching design and allow;
(3) there is longitudinal reinforcement to come out bottom this reinforced concrete beam span centre and be out of shape larger;
(4) stirrup is had to come out near this steel concrete beam stanchion, and part corrosion;
(5) longitudinal crack of this reinforced concrete beam soffit of girder and horizontal minute crack at the bottom of beam many, especially near bearing, structure durability is produced and has a strong impact on.
For ensureing the safety of above-mentioned reinforced concrete beam and normally using, reinforced concrete beam affixing steel plate of the present utility model pressurization fastening devices and reinforcement means is adopted to process it.
The reinforced concrete beam affixing steel plate pressurization fastening devices that the present embodiment adopts as shown in Figure 1 and Figure 2, comprise the strengthening steel slab 5 that is pasted on and treats reinforcement of rc beam 1 surface and carry out fixing pressure-applying unit in early stage to strengthening steel slab 5, strengthening steel slab 5 is pasted on the bottom surface for the treatment of reinforcement of rc beam 1 by structural adhesive layer 6.Pressure-applying unit is U-shaped, the pressure-applying unit of this U-shaped comprises the bottom compressing strengthening steel slab 5 to be fixed steel part 4 (it is angle steel that steel part is fixed in the bottom of the present embodiment) and is positioned at the beam rib fixing steel part 4 both wings in bottom and fix reinforcing bar 2, the beam rib of both wings fix reinforcing bar 2 be individually fixed in treat reinforcement of rc beam 1 two sides on.One end that each beam rib fixes reinforcing bar 2 is provided with threaded portion, bottom can be fixed steel part 4 to degree of tightness be pressed on strengthening steel slab 5 by screwing of set bolt 3 by this threaded portion, the other end that each beam rib fixes reinforcing bar 2 is provided with the hook part of L shape, the other end that beam rib fixes reinforcing bar 2 be held in by the hook part of this L shape treat that reinforcement of rc beam 1 surface is offered holddown groove in.Pressure-applying unit in the present embodiment is provided with many groups, and the pressure-applying unit of many groups is distributed in equally spacedly and treats on reinforcement of rc beam 1.
Based on a reinforcement means for the reinforced concrete beam affixing steel plate pressurization fastening devices of above-mentioned the present embodiment, comprise the following steps:
A () is treating that reinforcement of rc beam 1 liang of side rib drilled in middle shallow bore hole is as holddown groove, fixes reinforcing bar 2 by fixing two beam ribs and is anchored in holddown groove, mended by shallow bore hole fixing in time with concrete;
B the impurity such as dust, rust staining of reinforcing face and steel plate binding face bottom reinforcement of rc beam 1 is treated in () cleaning polishing, make that bonding surface is smooth, free from admixture, smearing structure glue on processed good reinforcing face and strengthening steel slab 5, structure glue will apply equably, is treating that the bottom surface of reinforcement of rc beam 1 forms structural adhesive layer 6;
C high-strength strengthening steel slab 5 is pasted onto the bottom surface for the treatment of reinforcement of rc beam 1 by structural adhesive layer 6 by ();
D bottom is fixed steel part 4 by set bolt 3 and is connected with the bottom that two beam ribs of pre-anchoring fix reinforcing bar 2 by () again, tighten set bolt 3 pairs of strengthening steel slabs 5 to apply one and upward pressure and be fixed, and make the fixing steel part 4 in bottom hold out against strengthening steel slab 5; Fix in bottom to fill between steel part 4 and strengthening steel slab 5 and add slim timber wedge block, the upwards support force applied further is subject to make strengthening steel slab 5, and then make strengthening steel slab 5 with treat the bottom surface of reinforcement of rc beam 1 affixed be one overall, and produce one upwards force displacement, after assembly removal to be pressurised strengthening steel slab 5 with treat to produce a prestressing effect in the integrated member that reinforcement of rc beam 1 sticks into;
E () reaches design strength and after the design strength that reinforcement of rc beam 1 reaches required by reinforcing design until structural adhesive layer 6 solidification, put a strengthening steel slab 5, remove beam rib to fix reinforcing bar 2 and bottom and fix the pressure-applying unit that steel part 4 forms, complete reinforcing process.
And fix reinforcing bar 2 and bottom by beam rib and fix steel part 4 strengthening steel slab is fixed, again set bolt is tightened, treat that fastening devices is removed after reaching the intensity of reinforcing design by structure glue sclerosis and reinforcement again, thus the object of reinforcement and strengthening is reached to this reinforced concrete beam.
Therefore, a set of reinforced concrete beam affixing steel plate pressurization fastening devices is devised especially targetedly in the present embodiment, this fastening devices adopts a set of bottom to fix steel part 4, beam rib fixes the U-shaped fixing pressure-applying unit of reinforcing bar 2 and set bolt 3 composition, specifically in the middle part of the both sides of the chest treating reinforcement of rc beam 1 respectively in beam shallow anchor beam rib fix reinforcing bar 2, the other end that beam rib fixes reinforcing bar 2 extends and has more 10cm bottom beam, treating that the angle steel that the bottom of reinforcement of rc beam 1 adds a transverse direction withstands strengthening steel slab 5 again, this angle steel the right and left is drilled with bolt hole on the vertical line being positioned at both sides beam rib and fixing reinforcing bar 2, the beam rib of both sides fixes reinforcing bar 2 through bolt hole, and tighten with set bolt 3, make the beam rib angle steel fixed bottom reinforcing bar 2 and beam of beam side form a U-shaped pressure-applying unit and withstand strengthening steel slab 5 at the bottom of beam, and along beam length direction, multiple pressure-applying unit is being installed equally spacedly, after treating that structure glue solidification and reinforcement of rc beam reach the design strength of reinforcing design, then this U-shaped pressure-applying unit is removed.The pressurization fastening devices of the present embodiment can recycle, and simple installation, fixed performance is good.In addition, based on the reinforcement means of above-mentioned pressurization fastening devices in the present embodiment, not only constructing operation is easy, and the construction period is short, and after reinforced concrete beam reinforcing, supporting capacity is strengthened, and occurs without unfavorable conditions such as any crack, distortion.
As seen from the above-described embodiment, pressurization fastening devices simple installation of the present utility model, economical forms a U-shaped pressure-applying unit with reinforcing bar and angle steel.This pressurization fastening devices can when not taking support fixed space, in brief installation work-hour, a kind of both economical structural strengthening pattern is provided, fastening devices with other is the same with reinforcement means, and the concrete beam structure after reinforcement can improve the crack resistance of the supporting capacity of structure serviceability limit stage, rigidity and structure greatly.In addition, pressurization fastening devices of the present utility model can follow bad utilization, is conducive to saving reinforcement cost, and in beam local ambient, is arranging pressurization fastening devices dexterously, make this device substantially not take any unnecessary space, avoid building and rebuild the investment pressure brought.
Claims (8)
1. a reinforced concrete beam affixing steel plate pressurization fastening devices, it is characterized in that: described reinforced concrete beam affixing steel plate pressurization fastening devices comprises the strengthening steel slab (5) that is pasted on and treats reinforcement of rc beam (1) surface and carries out fixing pressure-applying unit in early stage to strengthening steel slab (5), described strengthening steel slab (5) is pasted on by structural adhesive layer (6) to treat reinforcement of rc beam (1) surface, described pressure-applying unit is U-shaped, the pressure-applying unit of this U-shaped comprises the bottom compressing described strengthening steel slab (5) to be fixed steel part (4) and is positioned at the beam rib fixing steel part (4) both wings in bottom and fix reinforcing bar (2), one end that each beam rib fixes reinforcing bar (2) is fixed steel part (4) by securing member and bottom and is connected, the other end that each beam rib fixes reinforcing bar (2) is fixed on the surface for the treatment of reinforcement of rc beam (1).
2. reinforced concrete beam affixing steel plate pressurization fastening devices according to claim 1, is characterized in that: described strengthening steel slab (5) is pasted on the bottom surface for the treatment of reinforcement of rc beam (1).
3. reinforced concrete beam affixing steel plate according to claim 2 pressurization fastening devices, is characterized in that: the beam rib of described both wings fix reinforcing bar (2) be individually fixed in treat reinforcement of rc beam (1) two sides on.
4. the reinforced concrete beam affixing steel plate pressurization fastening devices according to claim 1,2 or 3, it is characterized in that: one end that described beam rib fixes reinforcing bar (2) is provided with threaded portion, described securing member is set bolt (3), and bottom can be fixed steel part (4) to degree of tightness be pressed on described strengthening steel slab (5) by screwing of set bolt (3).
5. reinforced concrete beam affixing steel plate pressurization fastening devices according to claim 4, it is characterized in that: the other end that described beam rib fixes reinforcing bar (2) is provided with the hook part of L shape, and be held in by the hook part of this L shape treat that reinforcement of rc beam (1) surface is offered holddown groove in.
6. the reinforced concrete beam affixing steel plate pressurization fastening devices according to claim 1,2 or 3, it is characterized in that: the other end that described beam rib fixes reinforcing bar (2) is provided with the hook part of L shape, and be held in by the hook part of this L shape treat that reinforcement of rc beam (1) surface is offered holddown groove in.
7. the reinforced concrete beam affixing steel plate pressurization fastening devices according to claim 1,2 or 3, is characterized in that: described pressure-applying unit is provided with many groups, and the pressure-applying unit of many groups is distributed in equally spacedly and treats on reinforcement of rc beam (1).
8. the reinforced concrete beam affixing steel plate pressurization fastening devices according to claim 1,2 or 3, is characterized in that: it is angle steel that steel part (4) is fixed in described bottom.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420769217.4U CN204435925U (en) | 2014-12-09 | 2014-12-09 | Reinforced concrete beam affixing steel plate pressurization fastening devices |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104481165A (en) * | 2014-12-09 | 2015-04-01 | 卜良桃 | Pressurizing and fixing device and reinforcing method for adhered steel plate of reinforced concrete beam |
| CN105756365A (en) * | 2016-03-22 | 2016-07-13 | 武汉大学 | Method for accelerating reinforcement of concrete beam |
-
2014
- 2014-12-09 CN CN201420769217.4U patent/CN204435925U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104481165A (en) * | 2014-12-09 | 2015-04-01 | 卜良桃 | Pressurizing and fixing device and reinforcing method for adhered steel plate of reinforced concrete beam |
| CN104481165B (en) * | 2014-12-09 | 2017-03-15 | 卜良桃 | Reinforced beam affixing steel plate pressurization fixing device and reinforcement means |
| CN105756365A (en) * | 2016-03-22 | 2016-07-13 | 武汉大学 | Method for accelerating reinforcement of concrete beam |
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