CN100359118C

CN100359118C - Method of applying FRP rope reinforced member and its special equipment

Info

Publication number: CN100359118C
Application number: CNB200410083626XA
Authority: CN
Inventors: 吴智深; 岳清瑞; 吕志涛; 小林朗; 吴刚; 岩下健太郎
Original assignee: Nippon Iron Composite
Current assignee: Nippon Iron Composite
Priority date: 2004-10-13
Filing date: 2004-10-13
Publication date: 2008-01-02
Anticipated expiration: 2024-10-13
Also published as: CN1760489A

Abstract

The present invention discloses a method of applying an FRP rope to reinforce a structural member and special equipment thereof. The method comprises the following procedures: firstly, a slot is arranged on a reinforced structural member; secondly, base rubber is coated in the slot; thirdly, an FRP rope is tensioned in the slot, and definite prestressing force is kept; fourthly, resin is filled in the slot; fifthly, the resin is heated and solidified; sixthly, the tensioned FRP rope is released. The special equipment comprises an anchor device and a tensioning device. The present invention has the advantages of good reinforcing effect, high FRP utilization rate, low requirements for an anchorage and an anchorage area, simple construction process, good durability and good integrity of reinforcing material and structure, obtains commendably improvement for the phenomenon of stress concentration at the end part, thoroughly eliminates structural side effects by reinforcing, and has small working space needed by the end part of a beam.

Description

A kind of method of applying FRP rope reinforced member

Technical field

The present invention relates to a kind of method and special equipment thereof of reinforcement means and special equipment thereof, particularly applying FRP rope reinforced member of structural member.

Background technology

Because the FRP material has high-strength, lightweight, corrosion-resistant excellent properties such as strong, the material of reinforcing bar (cloth, plate, rope, muscle) instead in civil works, very big application has been arranged in civil engineering, but, also have only outer subsides FRP sheet ruggedized construction and external prestressing FRP rope reinforced in using at present.

There is following shortcoming in the outer pre-stress FRP sheet material ruggedized construction of pasting: when 1, no resin continuous fiber being carried out stretch-draw, initial prestressing force low excessively (when initial prestressing force is that about 30% of ultimate stress just has fibre to begin fracture), deduct anchorage loss again, relaxation loss etc., the effective prestress that can import is low, consolidation effect is not obvious, and economy is also bad.2, if elder generation's brushing resin outside continuous fiber, after carry out stretch-draw, its control stress for prestressing about 60% of stress that can reach capacity, but because after the hardening of resin, sheet stiffness and hardness are all bigger, be difficult to guarantee to paste closely knitly with body structure surface, particularly coming off at salt damage, concrete more seriously reaches beam and has under the situation such as antiarch, and bond damage takes place easily.3, owing to be the reinforcing of external labeling type, its durability still is a problem.

The following deficiency of the rope reinforced also existence of external prestressing FRP: 1, very high to the anchoring property requirement, ground tackle and anchorage zone there are specific (special) requirements, sometimes ground tackle also is not easy to be provided with; 2, require in beam end bigger working space is arranged during stretch-draw, construction technology is comparatively complicated; 3, for effectively applying prestressing force, guaranteeing consolidation effect, need transfer is set on beam, increased loss of friction; 4, if do not take special measure, be easy to by artificial destruction, there is potential safety hazard during to the reinforcing of Important Project; Even 5 have enough end anchorages, stretch-draw prestressing force will cause very big stress to concentrate in the end, cause very big burden to the end; 6, it is limited that FRP material and structure do not have the bonding and reinforcement effect.

The innovation and creation content

It is simpler to the purpose of this invention is to provide a kind of process, and consolidation effect is the method for applying FRP rope reinforced member preferably.

The invention provides the method for legal person's applying FRP rope reinforced member, may further comprise the steps: slot on the reinforced member treating (1); (2) brushing primer in described groove; (3) stretch-draw one FRP rope in groove, and keep certain prestressing force; (4) perfusion resin or other are such as suitable bonding packing materials such as polymer pea gravel concretens in groove; (5) resin is heating and curing; (6) the FRP rope of relieving stretch-draw.

In said method, wherein in second step primer brushed to should be denseness less, and can infiltrate concrete liquid glue preferably, for example Japan's model that day iron composite material Co., Ltd. produces is the epoxy resin of FP-NS; In the 3rd step, the FRP rope is connected with FRP cloth or flexible cable through an anchor device, and stretch-draw under the drive of FRP cloth or flexible cable; The resin that pours in the 4th step should be the glue that denseness is big, mechanical property is good or other are such as suitable bonding packing materials such as polymer pea gravel concretens, be preferably the resin that pours into high rigidity at the middle part, for example model is the putty (putty) of FE-Z, and the low rigidity resin of perfusion in the certain limit of two ends, the model of producing as Japan day iron composite material Co., Ltd. is the soft epoxy resin of FP-E400.In addition, behind the FRP rope of decontroling stretch-draw, the anchor device of end is thickeied topping with one protect; Described thickening topping is pea gravel concreten or epoxy mortar etc.

Second purpose of the present invention provides the special equipment of using in the applying FRP rope reinforced member process.

Special equipment anchor device provided by the present invention and tensioning equipment.Anchor device provided by the invention has two kinds, wherein a kind of two steel plates that include, and folder is established a FRP cloth between described two steel plates; One is provided with the rectangular block of burying the hole underground, and burying underground in the hole of described rectangular block stretched in the end of described FRP rope, and uses the swollen resin anchoring; Described steel plate is connected by bolt with rectangular block.Another kind comprises two rectangular blocks of burying the hole underground that link together and be provided with, and wherein burying underground in the hole of a rectangular block stretched in the end of described FRP rope, and uses the swollen resin anchoring, another rectangular block bury anchoring one flexible cable in the hole underground.

In addition, the present invention also discloses a kind of special tensioner of applying FRP rope reinforced member, and it comprises the linkage of FRP rope and FRP cloth (perhaps flexible cable); The fastening devices of tensioning equipment on concrete beam; And the device that FRP cloth is carried out stretch-draw.

The present invention is owing to take above design, and it has the following advantages:

(1) the initial control stress for prestressing height of FRP, therefore, consolidation effect is good, FRP utilization rate height; (2) the end stress concentration phenomenon is improved well, and reinforcing is thoroughly separated the side effect of structure and disappeared; (3) to ground tackle and anchorage zone require lowly, even need not specific anchor device; (4) the required working space of beam end is little, and construction technology is simpler; (5) excellent in durability; (6) good integrity of reinforcing material and structure.

Description of drawings

Fig. 1 is the step schematic diagram of method provided by the present invention

Fig. 2 is the structural representation of embodiment 1 provided by the present invention

Fig. 3 is a kind of structural representation of anchor device

Fig. 4 is the structural representation of another kind of anchor device

Fig. 5 is the structural representation of tensioning equipment among the present invention

Fig. 6 is a kind of improved procedure of embodiment 2 provided by the present invention

Fig. 7 is the another kind of improved procedure of embodiment 2 provided by the present invention

Fig. 8 is another improved procedure of embodiment 2 provided by the present invention

The specific embodiment

Embodiment 1, the applying FRP rope reinforcement.

As shown in Figure 1 and Figure 2, the first step goes up fluting 2 (shown in Fig. 1-B) at beam to be reinforced 1 (shown in Fig. 1-A); In second step, shown in Fig. 1-C, brushing primer 3 in described groove 2 is the epoxy resin of FP-NS such as model; The 3rd step, shown in Fig. 1-D, stretch-draw one FRP rope 4 in the groove of handling through second step 2, the two ends of FRP rope 4 are connected with FRP cloth 6 or flexible cable 7 through an anchor device 5; As select for use by FRP cloth and come stretch-draw FRP rope, then the concrete structure of anchor device 5 as shown in Figure 3, it includes two steel plates 51 and and is provided with the rectangular block 52 of burying the hole underground, at first FRP cloth 6 is clamped with two block plates, FRP rope 4 stretches into burying underground of rectangular block and also uses the swollen resin anchoring in the hole, with bolt 53 steel plate 51 is connected with rectangular block 52 then, under the drive of FRP cloth 6, FRP rope 4 is carried out stretch-draw; As select for use by flexible cable 7 and come stretch-draw FRP rope 4, then the concrete structure of anchor device 5 as shown in Figure 4, it includes two rectangular blocks 54 that link together and be provided with and bury the hole underground, wherein burying underground in the hole of a rectangular block stretched in the end of FRP rope 4, and use the swollen resin anchoring, another rectangular block bury anchoring one flexible cable 7 in the hole underground, then flexible cable 7 is carried out stretch-draw, thereby drives 4 stretch-draw of FRP rope; The 4th step, shown in Fig. 1-E, perfusion resin 8 in groove, and for the consideration of eliminating the end stress concentration phenomenon, what pour into high rigidity at the middle part of groove is the putty (putty) 81 of FE-Z as model, and low rigidity of two ends perfusion such as model are the barras 82 of FP-Z400; The 5th step shown in Fig. 1-F, was heating and curing to above-mentioned resin, and the temperature of heating is about 80 ℃, and the retention time is about 3 hours; The 6th step, shown in Fig. 1-G, after being heating and curing, decontrol the FRP rope 4 of stretch-draw, prestressing force is discharged; The 7th step, shown in Fig. 1-H, anchor device 5 usefulness one of end to be thickeied topping 9 protect, the thickening topping is adopted as pea gravel concreten or epoxy mortar.

In the present embodiment, when carrying out stretch-draw, tensioning equipment 10 is installed in the side of waiting to reinforce object, and as shown in Figure 5, tensioning equipment includes: the linkage 11 of (1) FRP rope and FRP cloth (perhaps flexible cable), promptly above-mentioned anchor device 5; (2) fastening devices 12 of tensioning equipment on concrete beam, this device mainly comprises a steering spindle 121 and a fixed mount 122, and fixed mount 122 is installed on the beam to be reinforced 1, and steering spindle 121 is installed on the fixed mount 122; (3) FRP cloth (flexible cable) is carried out the device 13 of stretch-draw, this device mainly comprises a tension rod 131 and a jack 132, and it is installed on the fixed mount 122.

Embodiment 2, reduce the embodiment that end stress is concentrated

Also there is the stress concentration phenomenon sometimes in built-in type FRP rope reinforced concrete structure end described in the foregoing description, and bond damage takes place easily.Consider that heavily stressed existence is the basic reason that the stress concentration phenomenon produces on the FRP rope of end, and this part stress does not have any effect to the consolidation effect of concrete beam, so, can fall this part stress release, the method for its solution has: the width that 1. strengthens the anchored end conduit; 2. strengthen the degree of depth of anchored end conduit; 3. control end resin heat time heating time, when resin does not reach intensity fully, discharge prestressing force; 4. use the lower resin of ratio of rigidity in the end, 5. carry out anchoring with u tie in the end; Take after the above measure, can improve the end stress concentration phenomenon well.And, in actual engineering, can be as the case may be, the whole bag of tricks can comprehensively use.

Following mask body is described below:

1, the end conduit is widened gradually, this part conduit is horn-like, and scope is about apart from about the FRP bitter end 200～400mm of portion.As shown in Figure 6.

2, the end conduit is deepened gradually, and this part conduit is stepped, and scope is about apart from about the FRP bitter end 200～400mm of portion.As shown in Figure 7.

3, reduce end resin curing time, when resin is heating and curing, the maintenance 3 hours under 80 ℃ of conditions of middle part resin, and the maintenance 3 hours under 40 ℃～60 ℃ conditions of end resin.Discharge prestressing force then, at this moment, the resin of end does not solidify fully, so rigidity is less relatively, thereby can reduce the stress concentration phenomenon.

4, low rigidity resin is adopted in the end, eliminates the end stress concentration phenomenon in order to reach after prestressing force discharges, and can use the less resin of rigidity in the end.

5, carry out anchoring in the end with u tie, as shown in Figure 8, for further improving the end stress concentration phenomenon, consider that simultaneously probabilistic factor is many in the actual engineering, need to improve the reliability of reinforcing, so still some anchoring measures are taked in suggestion, as set up some u ties etc., described u tie is meant many U-shaped FRP hoops of using at present in engineering.

Claims

1, a kind of method of applying FRP rope reinforced member may further comprise the steps: slot on the reinforced member treating (1); (2) brushing primer in described groove; (3) stretch-draw one FRP rope in groove, the FRP rope is connected with FRP cloth or flexible cable through an anchor device, and stretch-draw under the drive of FRP cloth or flexible cable, keeps certain prestressing force; (4) perfusion resin in groove; (5) resin is heating and curing; (6) the FRP rope of relieving stretch-draw.

2, the method for a kind of applying FRP rope reinforcing according to claim 1 is characterized in that: in described second step, the primer of brushing is an epoxy resin.

3, the method for a kind of applying FRP rope reinforcing according to claim 2, it is characterized in that: described primer is a FP-NS epoxy resin.

4, according to claim 1 or 2 or 3 described methods, it is characterized in that: behind the FRP rope of decontroling stretch-draw, the anchor device of end is thickeied topping with one protect; Described thickening topping is pea gravel concreten or epoxy mortar.

5, according to claim 1 or 2 or 3 described methods, it is characterized in that: the resin that in described groove, pours into, the resin of the high rigidity of its middle part perfusion, the resin of the low rigidity of two ends perfusion.

6, method according to claim 5 is characterized in that: the resin of described high rigidity is the FE-Z putty; The resin of low rigidity is the soft epoxy resin of FP-E400.