CN104372956A - Prestressed tension device and method for fiber sheet - Google Patents
Prestressed tension device and method for fiber sheet Download PDFInfo
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- CN104372956A CN104372956A CN201410686612.0A CN201410686612A CN104372956A CN 104372956 A CN104372956 A CN 104372956A CN 201410686612 A CN201410686612 A CN 201410686612A CN 104372956 A CN104372956 A CN 104372956A
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Abstract
The invention relates to a prestressed tension device for a fiber sheet. The prestressed tension device comprises an adjustable support, a digital display torque wrench, a sleeve and a clamping plate. The adjustable support is formed by connecting a first support body and a second support body through screws and nuts, the fiber sheet is clamped and fixed to the support body on one side of the adjustable support through the clamping plate, the torque wrench is matched with the sleeve to adjust the nuts, the distance between the support bodies is changed accordingly, and the fiber sheet is tensioned. According to the prestressed tension method based on the prestressed tension device for the fiber sheet, prestressed tension of the fiber sheet is achieved by adjusting the screws and the nuts, and fastening tension is controlled through the digital display torque wrench. Compared with the prior art, the prestressed tension device and method have the advantages that the device is simple in structure, flexible in mounting and disassembling, low in manufacturing cost and capable of being repeatedly used; the construction method is simple and practicable, operation can be carried out by one worker, tensioning force is accurately controlled, and construction efficiency is remarkably improved.
Description
Technical field
The present invention relates to structural strengthening technical field of construction, particularly relate to a kind of pre-stress stretching device and pre-stress stretching method of fibre sheet material.
Background technology
In recent years, fibre sheet material, with the particular advantages such as its lightweight, high-strength (carbon fiber strength is about steel 10 times), corrosion-resistant, easy construction, is applied to structure repair and field of reinforcement more and more widely.But, while high-intensity fiber sheet material reinforcement means is promoted on a large scale, researcher also finds that the conventional reinforcement means of high-intensity fiber sheet material also exists obvious technological deficiency: because the modulus of elasticity of high-intensity fiber sheet material is only suitable with steel, when tensile reinforcement is surrendered, its intensity just plays less than 20%, only have after component serious cracking and distortion obviously increase, just may give play to more intensity level, but now component often can not meet normal instructions for use.Therefore, the pre-stressed construction method adopting high-intensity fiber sheet material in construction at present more.
For common high-intensity fiber sheet material, if adopt effective prestress tensioning equipment to carry out pre-stress construction, just can give full play to the intensity level of high-intensity fiber sheet material, improve cracking load and the yield load of component, alleviate the Stress resort problem of high-intensity fiber sheet material, effective 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 reinforcing technique, three kinds of pre-stressed construction methods are defined at present: 1) before the non-prestressed fibre sheet material of stickup, allow component play antiarch, then paste fibre sheet material, after release antiarch, make fibre sheet material produce prestressing force; The stress distribution of this kind of method generation is lower.2) in strenthening member, arrange permanent ground tackle, fibre sheet material carries out stretch-draw using strenthening member itself as reaction frame, and be pasted onto after stretch-draw is complete on component, ground tackle is retained in original position; This kind of method complex structure, difficulty of construction is large, and ground tackle cannot be reused, and adds disposable input cost.3) by the pre-pretensioning fibre sheet material of outside reaction frame, then paste on the component of reinforcing, after treating maintenance, cut off fibre sheet material at component root and carry out putting, reach the effect to strenthening member Shi Hanzhang.The method is simple, and input cost is low, but market does not also occur the pre-stress stretching device being easy to construction, and the stretching force size applied is uncontrollable.
Summary of the invention
The invention provides a kind of flexible and convenient to use, be easy to the pre-stress stretching device of the fibre sheet material of site operation, quantified controlling can be carried out to the stretching force applied, to reach the requirement giving full play to high-intensity fiber sheet strength value, invention also provides the pre-stress stretching method based on this device.
In order to achieve the above object, the present invention realizes by the following technical solutions:
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 connected by bolt and nut and pedestal two, fibre sheet material is fixedly clamped on the side pedestal of adjustable seats by clamping plate, coordinates 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 two ends establish at least 1 group bolt and nut to be fixedly connected with respectively.
Based on a kind of pre-stress stretching method of pre-stress stretching device of fibre sheet material, the prestressing force of fibre sheet material is pulled through bolt and nut and regulates realization, and its fastening pulling force is controlled by torque-indicating wrench.
A pre-stress stretching method for fibre sheet material, comprises the steps:
1) according to being reinforced the thickness determination pedestal one of component, the length of pedestal two and the length of screw rod, between pedestal one, pedestal two, adjustable distance is 100 ~ 200mm;
2) fastened with clamping plate on the pedestal of side need the fibre sheet material end clips of stretch-draw,
3) the screw rod end regions uniform application lubrication oil within the scope of adjustment stroke, pedestal one, pedestal two are sleeved on concrete column by bolt and nut, it regulates direction consistent with fibre sheet material stretch-draw direction, presetting nut, fibre sheet material is tightened, and adjustable seats is relative with concrete column fixing;
4) be arranged on nut by sleeve, with torque spanner adjusting nut, adjustment bearing pedestal spacing reduced, both sides nut alternately regulates, until torque spanner display numerical value reaches setting nut torsion numerical value P
ifin time, stops, and namely completes fibre sheet material tension operation.
A pre-stress stretching method for fibre sheet material, before construction, adopt and on all four instrument, measured piece and condition during construction, the fastening pulling force T of screw rod of more than three groups is carried out at scene and the ratio of nut torsion P is tested, according to formula:
In formula: K-nut friction factor; The fastening pulling force of T-; P-nut torsion; D-nut nominal diameter;
Calculate nut friction factor K, and obtain its average K
on average, then according to formula:
In formula: P
if-setting nut torsion; T
if-set fastening pulling force N: bolt and nut group number;
Try to achieve setting nut torsion P
if.
Compared with prior art, the invention has the beneficial effects as follows:
Utilize the relation formula of physical law that friction factor under identical contact surface condition is equal and nut torque value and screw rod pulling force, the prestressing force of fibre sheet material is pulled through bolt and nut and regulates, and screw rod value of thrust controls by torque-indicating wrench; Apparatus structure is simple, and installing/dismounting is flexible, and cost of manufacture is low and reusable; Construction method is simple, and single workman can operate, and stretching force precise control, efficiency of construction significantly improves.
Accompanying drawing explanation
Fig. 1 is the front view of device of the present invention.
Fig. 2 is the lateral 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. pedestal 1 pedestal 2 9. concrete column 10. concrete beam 11. fibre sheet material.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further:
See Fig. 1-Fig. 2, it is the structural representation of device of the present invention, the pre-stress stretching device of a kind of fibre sheet material of the present invention, comprise adjustable seats, torque-indicating wrench 1, sleeve 2 and clamping plate 6, described adjustable seats is made up of the pedestal 1 connected by screw rod 3 nut 4 and pedestal 28, fibre sheet material 11 is fixedly clamped on the side pedestal of adjustable seats by clamping plate 6, coordinates sleeve 2 adjusting nut 4 to change pedestal 7,8 spacing stretch-draw fibre sheet material 11 by torque spanner 1.
Described pedestal 1 and pedestal 28 are made by angle steel, opposing setting, and two ends establish at least 1 group screw rod 3 nut 4 to be fixedly connected with respectively.
Based on the pre-stress stretching method of the pre-stress stretching device of a kind of fibre sheet material of the present invention, the prestressing force of fibre sheet material 11 is pulled through screw rod 3 nut 4 and regulates realization, and 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) according to being reinforced the thickness determination pedestal 1 of component, the length of pedestal 28 and the length of screw rod 3, between pedestal 1, pedestal 28, adjustable distance is 100 ~ 200mm;
2) fastened with clamping plate 6 on side pedestal 7/8 need fibre sheet material 11 end clips of stretch-draw,
3) the spiral shell 3 boom end region uniform application lubrication oil within the scope of adjustment stroke, pedestal 1, pedestal 28 are sleeved on concrete column 9 by screw rod 3 nut 4, it regulates direction consistent with fibre sheet material 11 stretch-draw direction, presetting nut 4, fibre sheet material 11 is tightened, and adjustable seats is relative with concrete column 10 fixing;
4) be arranged on nut 3 by sleeve 2, with torque spanner 1 adjusting nut 4, adjustment bearing pedestal spacing reduced, both sides nut 4 alternately regulates, until torque spanner 1 shows numerical value reach setting nut torsion numerical value P
ifin time, stops, and namely completes fibre sheet material 11 tension operation.
A pre-stress stretching method for fibre sheet material, before construction, adopt and on all four instrument, measured piece and condition during construction, the fastening pulling force T of screw rod of more than three groups is carried out at scene and the ratio of nut torsion P is tested, according to formula:
In formula: K-nut friction factor; The fastening pulling force of T-; P-nut torsion; D-nut nominal diameter;
Calculate and often organize nut friction factor K, and obtain several groups of test back nut friction factor average K
on average, then according to formula:
In formula: P
if-setting nut torsion; T
if-set fastening pulling force; N: bolt and nut group number;
Try to achieve setting nut torsion P
if, this value is single nut torque value, and generally, adjustable seats both sides respectively establish one group of bolt and nut to 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 during test, the screw rod 3 of employing, nut 4, packing ring 5 model are all consistent with during construction, the screw rod 3 end regions uniform application lubrication oil within the scope of adjustment stroke.
Fibre sheet material 11 is by the pre-pretensioning of pre-stress stretching device of a kind of fibre sheet material of the present invention, then paste on the component (as concrete beam 10) of reinforcing, after treating maintenance, cut off fibre sheet material at component root to carry out putting, reach the effect to strenthening member Shi Hanzhang.
By the engineering practice at scene, the present invention can make efficiency of construction significantly improve.
Claims (5)
1. the pre-stress stretching device of a fibre sheet material, it is characterized in that, comprise adjustable seats, torque-indicating wrench, sleeve and clamping plate, described adjustable seats is made up of the pedestal one connected by bolt and nut and pedestal two, fibre sheet material is fixedly clamped on the side pedestal of adjustable seats by clamping plate, coordinates sleeve adjusting nut to change pedestal spacing stretch-draw fibre sheet material by torque spanner.
2. the pre-stress stretching device of a kind of fibre sheet material according to claim 1, is characterized in that, described pedestal one and pedestal two are made by angle steel, opposing setting, and two ends establish at least 1 group bolt and nut to be fixedly connected with respectively.
3. based on the pre-stress stretching method of the pre-stress stretching device of a kind of fibre sheet material according to claim 1, it is characterized in that, the prestressing force of fibre sheet material is pulled through bolt and nut and regulates realization, and its fastening pulling force is controlled by torque-indicating wrench.
4. the pre-stress stretching method of a kind of fibre sheet material according to claim 3, is characterized in that, comprise the steps:
1) according to being reinforced the thickness determination pedestal one of component, the length of pedestal two and the length of screw rod, between pedestal one, pedestal two, adjustable distance is 100 ~ 200mm;
2) fastened with clamping plate on the pedestal of side need the fibre sheet material end clips of stretch-draw,
3) the screw rod end regions uniform application lubrication oil within the scope of adjustment stroke, pedestal one, pedestal two are sleeved on concrete column by bolt and nut, it regulates direction consistent with fibre sheet material stretch-draw direction, presetting nut, fibre sheet material is tightened, and adjustable seats is relative with concrete column fixing;
4) be arranged on nut by sleeve, with torque spanner adjusting nut, adjustment bearing pedestal spacing reduced, both sides nut alternately regulates, until torque spanner display numerical value reaches setting nut torsion numerical value P
ifin time, stops, and namely completes fibre sheet material tension operation.
5. the pre-stress stretching method of a kind of fibre sheet material according to claim 4, it is characterized in that, before construction, adopt and on all four instrument, measured piece and condition during construction, the fastening pulling force T of screw rod of more than three groups is carried out at scene and the ratio of nut torsion P is tested, according to formula:
In formula: K-nut friction factor; The fastening pulling force of T-; P-nut torsion; D-nut nominal diameter;
Calculate nut friction factor K, and obtain its average K
on average, then according to formula:
In formula: P
if-setting nut torsion; T
if-set fastening pulling force; N: bolt and nut group number;
Try to achieve setting nut torsion P
if.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| 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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| CN104372956A true CN104372956A (en) | 2015-02-25 |
| CN104372956B CN104372956B (en) | 2016-05-11 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104775629A (en) * | 2015-04-14 | 2015-07-15 | 沈阳工业大学 | Prestress tension method and equipment for self-control fiber cloth |
| 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 |
| CN111608422A (en) * | 2020-06-17 | 2020-09-01 | 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
- 2014-11-25 CN CN201410686612.0A patent/CN104372956B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104775629A (en) * | 2015-04-14 | 2015-07-15 | 沈阳工业大学 | Prestress tension method and equipment for self-control fiber cloth |
| 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 |
| CN111608422A (en) * | 2020-06-17 | 2020-09-01 | 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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| Publication number | Publication date |
|---|---|
| CN104372956B (en) | 2016-05-11 |
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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 |