CN104372956B - A kind of pre-stress stretching method of fibre sheet material - Google Patents
A kind of pre-stress stretching method of fibre sheet material Download PDFInfo
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- CN104372956B CN104372956B CN201410686612.0A CN201410686612A CN104372956B CN 104372956 B CN104372956 B CN 104372956B CN 201410686612 A CN201410686612 A CN 201410686612A CN 104372956 B CN104372956 B CN 104372956B
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Abstract
The present invention relates to a kind of pre-stress stretching device of fibre sheet material, comprise adjustable seats, torque-indicating wrench, sleeve and clamping plate, described adjustable seats is made up of the pedestal one connecting by bolt and nut and pedestal two, clamping plate is fixedly clamped fibre sheet material on a side pedestal of adjustable seats, coordinates sleeve adjusting nut to change pedestal spacing stretch-draw fibre sheet material by torque spanner. The pre-stress stretching method of the pre-stress stretching device based on a kind of fibre sheet material, the prestressed stretch-draw of fibre sheet material regulates realization by bolt and nut, and its fastening pulling force is by torque-indicating wrench control. Compared with prior art, the invention has the beneficial effects as follows: apparatus structure is simple, installing/dismounting is flexible, and cost of manufacture is low and reusable; Construction method is simple, and single workman can operate, stretching force precise control, and efficiency of construction significantly improves.
Description
Technical field
The present invention relates to structural strengthening technical field of construction, relate in particular to a kind of fibre sheet material pre-stress stretching device andPre-stress stretching method.
Background technology
In recent years, fibre sheet material is with its lightweight, high-strength (carbon fiber strength is about 10 times of steel), corrosion-resistant, easy constructionEtc. particular advantages, be applied to more and more widely structure repair and field of reinforcement. But, at high-intensity fiber sheet material reinforcement meansWhen popularization on a large scale, researcher also finds that the conventional reinforcement means of high-intensity fiber sheet material exists obvious technological deficiency:Because the elastic modelling quantity of high-intensity fiber sheet material is only suitable with steel, in the time that tension reinforcement is surrendered, its intensity is just brought into play less than 20%,Only have after member serious cracking and distortion obviously increase, just may give play to more intensity level, but now member is oftenCan not meet normal instructions for use. Therefore, the pre-stressed construction methods that adopt high-intensity fiber sheet material in construction at present more.
For common high-intensity fiber sheet material, execute if adopt effective prestress tensioning equipment to carry out prestressing forceWork, just can give full play to the intensity level of high-intensity fiber sheet material, improves cracking load and the yield load of member, alleviates high-strength fibreThe stress hysteresis problem of dimension sheet material, effectively delayed fracture is carried out, and reduces deflection deformation, significantly improves the service behaviour of structure.
Pre-stress fibre sheet material ruggedized construction is a novel reinforcement technique, has formed at present three kinds of prestressing force and has executedWork method: 1) allowed member play antiarch before pasting non-prestressed fibre sheet material, then paste fibre sheet material, make after release antiarchFibre sheet material produces prestressing force; The stress distribution of this kind of method generation is lower. 2) permanent ground tackle is set in strenthening member,Fibre sheet material carries out stretch-draw using strenthening member itself as reaction frame, after stretch-draw is complete, stick on member, and ground tackle is retained in original position;This kind of method complex structure, difficulty of construction is large, and ground tackle cannot reuse, and has increased disposable input cost. 3) outside passing throughThe pre-pretensioning fibre sheet material of portion's reaction frame, then pastes on the member of reinforcing, after treating maintenance, cuts off fibre at member rootDimension sheet material is put and is opened, and reaches strenthening member is applied to prestressed effect. The method is simple, and input cost is low, but cityOn field, also do not occur being easy to the pre-stress stretching device of construction, and the stretching force size applying is uncontrollable.
Summary of the invention
The invention provides one flexible and convenient to use, be easy to the pre-stress stretching device of the fibre sheet material of site operation,Can carry out quantified controlling to the stretching force applying, to reach the requirement of giving full play to high-intensity fiber sheet strength value, the present inventionPre-stress stretching method based on this device is provided simultaneously.
In order to achieve the above object, the present invention realizes by the following technical solutions:
A pre-stress stretching device for fibre sheet material, comprises adjustable seats, torque-indicating wrench, sleeve and clamping plate,Described adjustable seats is made up of the pedestal one connecting by bolt and nut and pedestal two, and clamping plate is fixedly clamped fibre sheet materialOn one side pedestal of adjustable seats, coordinate sleeve adjusting nut to change pedestal spacing stretch-draw fibre sheet material by torque spanner.
Described pedestal one and pedestal two are made by angle steel, opposing setting, and it is even fixing that at least 1 group bolt and nut is established respectively at two endsConnect.
The pre-stress stretching method of the pre-stress stretching device based on a kind of fibre sheet material, the prestressed stretch-draw of fibre sheet materialRegulate realization by bolt and nut, its fastening pulling force is by torque-indicating wrench control.
A pre-stress stretching method for fibre sheet material, comprises the steps:
1) determine pedestal one, the length of pedestal two and the length of screw rod, pedestal one, pedestal according to the thickness that is reinforced memberBetween two, adjustable distance is 100～200mm;
2) need the fibre sheet material end clips of stretch-draw to fasten on a side pedestal with clamping plate handle,
3) the even coating lubricating oil of screw rod end regions within the scope of adjustment stroke, passes through spiral shell by pedestal one, pedestal twoStem nut is sleeved on concrete column, and it regulates direction consistent with fibre sheet material stretch-draw direction, and presetting nut, stretches tight fibre sheet materialTightly, adjustable seats is relative with concrete column fixing;
4) sleeve is arranged on nut, makes to regulate bearing pedestal spacing to reduce with torque spanner adjusting nut, both sides spiral shellFemale alternately adjusting, reaches setting nut torsion numerical value P until torque spanner shows numerical valueIfIn time, stops, and has completed fibre sheet materialTension operation.
A pre-stress stretching method for fibre sheet material, before construction, on all four instrument, measured piece while adopting with constructionAnd condition, the ratio test of the more than three groups fastening pulling force T of screw rod and nut torsion P is carried out at scene, according to formula:
In formula: K-nut coefficient of friction; The fastening pulling force of T-; P-nut torsion; D-nut nominal diameter;
Calculate nut coefficient of friction K, and obtain its mean value KOn average, then according to formula:
In formula: PIf-setting nut torsion; TIf-set fastening pulling force N: bolt and nut group number;
Try to achieve and set nut torsion PIf。
Compared with prior art, the invention has the beneficial effects as follows:
Utilize physical law that under identical contact-making surface condition, coefficient of friction is equal and the pass of nut torque value and screw rod pulling forceBe formula, the prestressed stretch-draw of fibre sheet material regulates by bolt and nut, and screw rod value of thrust can pass through torque-indicating wrenchControl; Apparatus structure is simple, and installing/dismounting is flexible, and cost of manufacture is low and reusable; Construction method is simple, single workPeople can operate, stretching force precise control, and efficiency of construction significantly improves.
Brief description of the drawings
Fig. 1 is the front view of device of the present invention.
Fig. 2 is the side view of device of the present invention.
In figure: 1. torque-indicating wrench 2. sleeve 3. screw rod 4. nut 5. packing ring 6. clamping plate 7. pedestals 1Pedestal 2 9. concrete column 10. beams of concrete 11. fibre sheet materials.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further:
Seeing Fig. 1-Fig. 2, is the structural representation of device of the present invention, the prestressing force of a kind of fibre sheet material of the present inventionTensioning equipment, comprises adjustable seats, torque-indicating wrench 1, sleeve 2 and clamping plate 6, and described adjustable seats is by passing through screw rod 3 spiral shellsFemale 4 pedestals 1 that connect and pedestal 28 compositions, clamping plate 6 is fixedly clamped fibre sheet material 11 at a side pedestal of adjustable seatsUpper, coordinate sleeve 2 adjusting nuts 4 to change pedestal 7,8 spacing stretch-draw fibre sheet materials 11 by torque spanner 1.
Described pedestal 1 and pedestal 28 are made by angle steel, opposing setting, and it is solid that at least 1 group screw rod 3 nuts 4 are established respectively at two endsFixed connection.
The pre-stress stretching method of the pre-stress stretching device based on a kind of fibre sheet material of the present invention, fibre sheet material 11Prestressed stretch-draw regulate and realize by screw rod 3 nuts 4, its fastening pulling force is controlled by torque-indicating wrench 1.
The pre-stress stretching method of a kind of fibre sheet material of the present invention, comprises the steps:
1) determine the length of pedestal 1, pedestal 28 and the length of screw rod 3 according to the thickness that is reinforced member, pedestal 1,Between pedestal 28, adjustable distance is 100～200mm;
2) need fibre sheet material 11 end clips of stretch-draw to fasten on a side pedestal 7/8 with 6 of clamping plates,
3) the spiral shell 3 even coating lubricating oil in boom end region within the scope of adjustment stroke, pass through pedestal 1, pedestal 28Screw rod 3 nuts 4 are sleeved on concrete column 9, and it regulates direction consistent with fibre sheet material 11 stretch-draw directions, and presetting nut 4, makes fibreDimension sheet material 11 is tightened, and adjustable seats is relative with concrete column 10 fixing;
4) sleeve 2 is arranged on nut 3, makes to regulate bearing pedestal spacing to reduce with torque spanner 1 adjusting nut 4, twoSide nut 4 alternately regulates, and reaches setting nut torsion numerical value P until torque spanner 1 shows numerical valueIfIn time, stops, and has completed fibreDimension sheet material 11 tension operations.
A pre-stress stretching method for fibre sheet material, before construction, on all four instrument, measured piece while adopting with constructionAnd condition, the ratio test of the more than three groups fastening pulling force T of screw rod and nut torsion P is carried out at scene, according to formula:
In formula: K-nut coefficient of friction; The fastening pulling force of T-; P-nut torsion; D-nut nominal diameter;
Calculate every group of nut coefficient of friction K, and obtain several groups of test back nut coefficient of friction mean value KOn average, then rootAccording to formula:
In formula: PIf-setting nut torsion; TIf-set fastening pulling force; N: bolt and nut group number;
Try to achieve and set nut torsion PIf, this value is single nut torque value, generally, adjustable seats both sides respectively establish oneGroup bolt and nut can meet the demands, i.e. N=2.
The pre-stress stretching method of a kind of fibre sheet material of the present invention, complete construction simulation process when test, employingScrew rod 3, nut 4, packing ring 5 models are all consistent with when construction, and screw rod 3 end regions within the scope of adjustment stroke are evenly smeared lubricatedOil.
Fibre sheet material 11, by the pre-pretensioning of pre-stress stretching device of a kind of fibre sheet material of the present invention, is then pastedUpper to the member (as beams of concrete 10) of reinforcing, after treating maintenance, cut off fibre sheet material at member root and put, reachStrenthening member is applied to prestressed effect.
By on-the-spot engineering practice, the present invention can make efficiency of construction significantly improve.
Claims (3)
1. a pre-stress stretching method for fibre sheet material, based on a kind of pre-stress stretching device of fibre sheet material, its feature existsIn, the pre-stress stretching device of described fibre sheet material comprises adjustable seats, torque-indicating wrench, sleeve and clamping plate, described canAdjust bearing to be made up of the pedestal one connecting by bolt and nut and pedestal two, clamping plate is fixedly clamped fibre sheet material at adjustable supportingOn one side pedestal of seat, coordinate sleeve adjusting nut to change pedestal spacing stretch-draw fibre sheet material by torque spanner; Fibre sheet materialPrestressed stretch-draw regulate realization by bolt and nut, its fastening pulling force is by torque-indicating wrench control; Fibre sheet material pre-Stress tension method specifically comprises the steps:
1) determine pedestal one, the length of pedestal two and the length of screw rod according to the thickness that is reinforced member, pedestal one, pedestal two itBetween adjustable distance be 100～200mm;
2) need the fibre sheet material end clips of stretch-draw to fasten on a side pedestal with clamping plate handle,
3) the even coating lubricating oil of screw rod end regions within the scope of adjustment stroke, passes through screw rod spiral shell by pedestal one, pedestal twoMother set is contained on concrete column, and it regulates direction consistent with fibre sheet material stretch-draw direction, and presetting nut, tightens fibre sheet material,Adjustable seats is relative with concrete column fixing;
4) sleeve is arranged on nut, makes to regulate bearing pedestal spacing to reduce with torque spanner adjusting nut, both sides nut is handed overFor regulating, until showing numerical value, torque spanner reaches setting nut torsion numerical value PIfIn time, stops, and has completed fibre sheet material stretch-drawOperation.
2. the pre-stress stretching method of a kind of fibre sheet material according to claim 1, is characterized in that, described pedestal one HePedestal two is made by angle steel, opposing setting, and two ends are established respectively at least 1 group bolt and nut and are fixedly connected with.
3. the pre-stress stretching method of a kind of fibre sheet material according to claim 1, is characterized in that, before construction, adoptsOn all four instrument, measured piece and condition during with construction, the more than three groups fastening pulling force T of screw rod and nut torsion is carried out at sceneThe ratio test of P, according to formula:
In formula: K-nut coefficient of friction; The fastening pulling force of T-; P-nut torsion; D-nut nominal diameter;
Calculate nut coefficient of friction K, and obtain its mean value KOn average, then according to formula:
In formula: PIf-setting nut torsion; TIf-set fastening pulling force; N: bolt and nut group number;
Try to achieve and set nut torsion PIf。
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| CN201410686612.0A CN104372956B (en) | 2014-11-25 | 2014-11-25 | A kind of pre-stress stretching method of fibre sheet material |
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| CN104372956B true CN104372956B (en) | 2016-05-11 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104775629B (en) * | 2015-04-14 | 2017-05-31 | 沈阳工业大学 | The method and apparatus of autocontrol fiber cloth prestressed stretch-draw |
| CN104912192A (en) * | 2015-06-08 | 2015-09-16 | 浙江精工钢结构集团有限公司 | Steel tie rod assembly and steel tie rod tensioning construction method |
| CN109838554A (en) * | 2019-04-01 | 2019-06-04 | 济南大学 | A kind of variable prestressing force tube structure of hoop type |
| CN111608422B (en) * | 2020-06-17 | 2022-03-01 | 辽宁工程技术大学 | Tensioning device for pasting fiber cloth on concrete beam column |
| CN113482243A (en) * | 2021-08-19 | 2021-10-08 | 戴邵雷 | Detachable prestressing force carbon fiber ground tackle |
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| KR100522185B1 (en) * | 2004-07-28 | 2005-10-19 | 주식회사 세진에스씨엠 | Reinforcement apparatus for post tensioning using compressed grip and tension nut and methods of the same |
| CN201908449U (en) * | 2010-09-13 | 2011-07-27 | 泰安市路达公路仪器制造有限公司 | Pulling and anchoring integrated device of fiber cloth reinforced concrete structure |
| CN102493658A (en) * | 2011-11-16 | 2012-06-13 | 北京荣大兴业建筑材料有限公司 | Steel wire rope mesh tensioning device and method |
| CN103321430A (en) * | 2013-06-07 | 2013-09-25 | 华北水利水电大学 | Construction method of reinforcing large-span concrete structure with prestressed carbon fiber sheet |
| CN204266601U (en) * | 2014-11-25 | 2015-04-15 | 中冶焦耐工程技术有限公司 | A kind of pre-stress stretching device of fibre sheet material |
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- 2014-11-25 CN CN201410686612.0A patent/CN104372956B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100522185B1 (en) * | 2004-07-28 | 2005-10-19 | 주식회사 세진에스씨엠 | Reinforcement apparatus for post tensioning using compressed grip and tension nut and methods of the same |
| CN201908449U (en) * | 2010-09-13 | 2011-07-27 | 泰安市路达公路仪器制造有限公司 | Pulling and anchoring integrated device of fiber cloth reinforced concrete structure |
| CN102493658A (en) * | 2011-11-16 | 2012-06-13 | 北京荣大兴业建筑材料有限公司 | Steel wire rope mesh tensioning device and method |
| CN103321430A (en) * | 2013-06-07 | 2013-09-25 | 华北水利水电大学 | Construction method of reinforcing large-span concrete structure with prestressed carbon fiber sheet |
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Effective date of registration: 20180801 Address after: 116085 128 high energy street, Qixian Ling high tech Industrial Park, Dalian, Liaoning Patentee after: ACRE Coking And Refractory (Dalian) Engineering Consulting Corp., MCC Address before: 116085 128 high energy street, Qixian Ling high tech Industrial Park, Dalian, Liaoning Patentee before: ACRE Coking and Refractory Engineering Consulting Corporation, MCC |
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