JT/T 1267-2019Prestressing carbon fiber plate-gripping anchorage for bridge (English PDF)

Foreword

This standard is in accordance with GB/T Draft the rules given in 1-2009.

This standard is proposed and managed by the National Technical Committee for Traffic Engineering Facilities (Highway) Standardization (SAC/TC 223).

This standard was drafted. Hebei Baoli Engineering Equipment Co., Ltd., Hebei Engineering Rubber Engineering Technology Research Center, Beijing CCCC Tiejian Technology Development Co., Ltd., Shenzhen Wei Shibang Construction New Material Technology Co., Ltd.

Introduction

The issuer of this document draws attention to the fact that the declaration of compliance with this document may involve 4. 2 Structure and Patent No..2014 2.2009029. X the use of a patent related to "a carbon fiber holding device".

The issuing authority of this document has no position on the authenticity, validity and scope of the patent.

The patent holder has assured the publisher of this document that he is willing to work with any applicant on reasonable and non-discriminatory terms and conditions, Negotiating patent licenses. The patent holder's statement has been filed with the issuing authority of this document. Related information can be obtained through the following links Ways to get.

Patent holder name. Hebei Baoli Engineering Equipment Co., Ltd .;

Address. No. 13 Rubber and Plastic Road, North Industrial Base, Development Zone, Hengshui City;

Zip code. 053000.

Please note that in addition to the above patents, some content of this document may still involve patents. The issuer of this document is not responsible for identifying these Li's responsibility.

JT/T 1267-2019

Prestressed carbon fiber board for bridge-clamping anchor

1 Scope

This standard specifies the classification, structure, specifications, model, technical requirements, test methods, Inspection rules and requirements for marking, packaging, transportation and storage.

This standard applies to the production, inspection and use of prestressed carbon fiber board-clamping anchors for bridges.

2 Normative references

The following documents are essential for the application of this document. For dated references, only the dated version applies to this article Pieces. For undated references, the latest version (including all amendments) applies to this document.

GB/T 1184 Shape and position tolerances without tolerance values GB/T 1804 Tolerances for linear and angular dimensions without general tolerances GB/T 3077 alloy structural steel GB/T 3354 Test method for tensile properties of oriented fiber reinforced polymer matrix composites GB/T 3880. 1 Aluminum and aluminum alloy plates and strips for general industrial use Part 1. General requirements GB/T 13657 Bisphenol A epoxy resin GB/T 15519 Chemical conversion coating steel black oxide film specification and test method GB/T 16924 Quenching and tempering of steel parts GB/T 21490 Carbon fiber sheet for structural reinforcement and repair JB/T 5000. 9 General Specifications for Heavy Machinery Part 9. Cutting Workpieces NB/T 47013. 3 Nondestructive Testing of Pressure Equipment Part 3. Ultrasonic Testing NB/T 47013. 4 Non-destructive testing of pressure equipment Part 4. Magnetic particle testing

3 Terms and definitions, symbols

3.1 Terms and definitions the following terms and definitions apply to this document.

3. 1. 1

Gripping anchor gripping anchor Permanent wedge-shaped clip-type anchoring device (abbreviated as abbreviation) used to maintain the tensile force of prestressed carbon fiber board and transfer it to bridge members Anchor).

3. 1. 2

Prestressed carbon fiber board pressing carfon platter High-strength continuous carbon fibers are arranged according to a certain rule, impregnated with an adhesive, and bonded to form a fiber-reinforced effect.

Stretchable composite sheet.

3. 1. 3

Prestressed carbon fiber board-anchor pressing carf box plaza chanchorage Pre-stressed carbon fiber board and anchors at both ends are assembled in the factory.

JT/T 1267-2019

3.2 Symbol

The following symbols apply to this document.

fb --- standard tensile stress of prestressed carbon fiber board, unit is megapascal (MPa);

fc --- Tensile stress of pre-stressed carbon fiber board-anchor before delivery inspection, the unit is Megapascal (MPa);

f j --- ultimate breaking tensile stress of prestressed carbon fiber board, unit is megapascal (MPa);

fps --- prestressed carbon fiber board-anchor breaking tensile stress after fatigue test, the unit is megapascal (MPa);

fs --- External tensile prestressed carbon fiber board-anchor breaking tensile stress in megapascals (MPa);

fx --- External tensile prestressed carbon fiber board-anchor allowable tensile stress, in megapascals (MPa);

r --- When the prestressed carbon fiber board-anchor is subjected to the relaxation performance test, the relaxation rate of the prestressed carbon fiber board at a test time of 100 h is determined;

r ' --- prestressed carbon fiber board-anchorage relaxation rate by measuring the relaxation rate extrapolation test time 1000h;

etaa --- anchored efficiency coefficient of anchorage performance test of prestressed carbon fiber plate-anchorage under static load;

epsilons --- the total strain of the prestressed carbon fiber board when the anchorage reaches the breaking tensile stress.

4 Classification, structure, specification, model

4.1 Classification

Anchors are divided into two categories.

a) Tension anchors. codenamed Z;

b) Fixed-end anchorage. code G.

4.2 Structure

4.2.1 Pre-stressed carbon fiber board-anchor is pre-assembled and anchored at the factory by tensioned-end anchor, pre-stressed carbon fiber board, and fixed-end anchor the structure is shown in Figure 1.

Explanation.

1 --- tensioned anchors; 3 --- fixed anchors; B --- thickness of anchors; D --- width of fixed-end anchors.

2 --- prestressed carbon fiber board; A-length of anchorage; C-width of tensioned anchorage;

Figure 1 Schematic diagram of prestressed carbon fiber board-anchor structure

JT/T 1267-2019

4. 2. The two tensioned end and fixed end anchors are composed of anchor plates, clips, aluminum plates or adhesives. Tension end anchor structure is shown in Figure 2 the structure of the fixed-end anchorage is shown in Figure 3.

Explanation.

1 --- anchor plate; 3 --- aluminum plate or adhesive; B --- anchor thickness;

2 --- clip; A-length of anchor; C-width of tensioned end anchor.

Figure 2 Schematic diagram of tensioned anchorage structure

Explanation.

1 --- anchor plate; 3-aluminum plate or adhesive; B --- anchor thickness;

2 --- clip; A --- length of anchor; D --- width of fixed end anchor.

Figure 3 Schematic diagram of the anchor structure at the fixed end

4.2.3 Refer to Appendix A for the pre-stressed carbon fiber board-anchor installation instructions.

4.3 Specifications

For pre-stressed carbon fiber board-anchorage specifications, see Appendix B.

4.4 Model

The pre-stressed carbon fiber plate-anchor product model is shown in Figure 4.

Note. For new products with special or necessary characteristics, words or drawings can be added for accurate expression.

JT/T 1267-2019

Figure 4 Pre-stressed carbon fiber plate-anchor product model expression method

Example 1.

The prestressed carbon fiber board has a width of 50 mm and a thickness of 3. A 0mm tensioned anchor is marked "TBMJ 50 × 3.0".

Example 2.

The prestressed carbon fiber board has a width of 80 mm and a thickness of 1. 0mm fixed-end anchorage, marked "TBMJ 80 × 1.0 G".

5 Technical requirements

5.1 Appearance

5.1.1 Anchor

The appearance of the anchorage should be flat and clean, without mechanical damage, and there should be no cracks, scars, folds and inclusions.

5.1.2 Prestressed carbon fiber board the appearance of the prestressed carbon fiber board shall meet the requirements of GB/T 21490.

5.2 Materials

5.2.1 steel

The anchor plates and clips are made of 40Cr alloy structural steel, and the chemical composition and mechanical properties should meet the requirements of GB/T 3077.

5.2.2 Aluminum plate the chemical composition and mechanical properties of the aluminum plate shall comply with GB/T 3880. 1 provisions.

5.2.3 Binder

The adhesive is epoxy resin, and the technical requirements shall comply with the requirements of GB/T 13657.

5.2.4 Prestressed carbon fiber board the mechanical properties of the prestressed carbon fiber board shall meet the requirements of GB/T 21490, and its ultimate breaking tensile stress f j shall not be less than 2600 MPa.

5.3 Crafts

5.3.1 Machining performance Anchorage machining performance should comply with JB/T 5000. 9 provisions. Anchor blasting technology should ensure uniform surface roughness Consistent.

5.3.2 Dimensional deviation

5.3.2.1 The dimensional deviation of the anchorage shall meet the following requirements.

JT/T 1267-2019

a) The tolerances of the unmarked dimensions and angles of the anchorage shall meet the requirements of the m level in GB/T 1804, and the tolerances of the unmarked shapes and positions shall meet Class L regulations in GB/T 1184;

b) The machining dimension deviation of aluminum plate shall meet the requirements of Table 1.

Table 1 Aluminum plate size deviation

In millimeters

Length deviation width deviation thickness deviation + 3-0. 1 + 0. 05 + 2-0. 2 0

5.3.2.2 The dimensional deviation of the prestressed carbon fiber board shall meet the requirements of GB/T 21490.

5.3.3 Heat treatment performance the heat treatment of the anchorage shall comply with the provisions of GB/T 16924, and shall not cause cracks, scratches, overburning and decarburization. The heat treatment process used and equipment should be able to ensure the hardness and metallographic requirements of the working surface and core of the part, and the product quality is uniform.

5.3.4 Anchor detection After heat treatment of the anchorage, ultrasonic inspection or magnetic particle inspection shall be performed, and the inspection results shall not be defective.

5.3.5 Anticorrosive treatment the black oxide film covered on the surface of the anchor plate shall meet the requirements of GB/T 15519.

5.4 overall performance

5.4.1 Static load anchoring performance Static load anchoring performance meets the following requirements.

a) The tensile test of the prestressed carbon fiber plate-anchorage is performed on a static load test bench, and etaa is calculated according to formula (1);

etaa =

>=0. 8 (1)

b) The prestressed carbon fiber plate-anchorage is subjected to a breaking test on a static load test bench, where fs should be greater than or equal to fb; epsilons should be greater than or equal Yu 1. 4%;

c) Prestressed carbon fiber board-the failure mode of anchorage should be the fracture of prestressed carbon fiber board, and the anchorage parts should not be deformed or broken.

5.4.2 Clamping fatigue performance the clamping fatigue performance meets the following requirements.

a) The prestressed carbon fiber board-anchorage shall be subjected to a clamping fatigue performance test of 2 million cycles;

b) After the test specimen has been subjected to cyclic loading for 2 million times, the anchorage parts shall not undergo fatigue damage;

c) After the clamping fatigue performance test is performed on the original test piece of the anchorage, the fps should be greater than or equal to 97% of fb.

Note. When the project has special needs, the test stress upper limit and fatigue stress amplitude can be determined separately.

5.4.3 Relaxation performance Relaxation performance meets the following requirements.

a) Prestressed carbon fiber board-Anchorage should be prestressed carbon fiber board relaxation test, r should be less than 1. 5%;

b) Extrapolate the stress relaxation rate of 1000h from the relaxation result of 100h, r ' should be less than 2. 0%.

JT/T 1267-2019

5.5 assembly requirements 5. 5. 1. Before the parts to be assembled are assembled, the quality inspection department shall comply with 5. 1,5. 2 and 5. 3 requirements for testing Check mark before assembly.

5.5.2 Prestressed carbon fiber board-all parts shall be cleaned before assembly. Anchor plate anchoring surface, clip, aluminum plate and prestressed carbon fiber board the contact surface with the aluminum plate or adhesive should be clean and dry, and there should be no oil stains, bumps, rust, scratches.

5.5.3 Prestressed carbon fiber board-The stress deviation of the prestressed carbon fiber board after the anchor assembly is not greater than 5mm.

6 Test method

6.1 Appearance

The appearance of anchorage and prestressed carbon fiber board is inspected by visual inspection or other effective instruments.

6.2 Materials

6.2.1 The chemical composition and mechanical properties of anchor plates and clips shall be tested in accordance with GB/T 3077.

6.2.2 The chemical composition and mechanical properties of aluminum plates shall be tested in accordance with GB/T 3880. 1 provisions.

6.2.3 The physical properties of the bonding agent shall be measured in accordance with GB/T 13657.

6.2.4 Pre-stressed carbon fiber board for test should be randomly selected at least 6 test pieces for mechanical properties of the base metal according to GB/T 3354 test.

6.3 Crafts

6.3.1 Dimensions

The dimensions of the anchor, aluminum plate and prestressed carbon fiber board are measured with steel rulers, vernier calipers and other measuring tools.

6.3.2 Anchor heat treatment the heat treatment hardness and metallographic examination of the anchorage should be carried out in accordance with GB/T 16924.

6.3.3 Anchor flaw detection Ultrasonic testing should be in accordance with NB/T 47013. 3, the magnetic particle detection should be in accordance with NB/T 47013. 4 provisions.

6.3.4 Anticorrosive treatment the inspection of the anticorrosive layer shall be carried out in accordance with GB/T 15519.

6.4 overall performance

6.4.1 The static load anchorage test method of prestressed carbon fiber board-anchorage shall be carried out in accordance with Appendix C.

6.4.2 The prestressed carbon fiber plate-anchorage clamping fatigue performance test method shall be carried out in accordance with Appendix D.

6.4.3 The pre-stressed carbon fiber plate-anchorage relaxation performance test method shall be carried out in accordance with Appendix E.

7 Inspection rules

7.1 Inspection classification

7.1.1 Inspection is divided into type inspection and factory inspection.

JT/T 1267-2019

7.1.2 Type inspection shall be carried out in any of the following cases.

a) Trial-type appraisal of new or old products transferred to production;

b) After the official production, if there are changes in the structure, materials and processes that affect the performance of the product;

c) In normal production, inspections are performed every 2 to 3 years regularly or after accumulation of 30,000 sets;

d) the product is discontinued for more than one year, when production is resumed;

e) When there is a large difference between the factory inspection results and the last type inspection;

f) When a national quality supervision agency requests a type inspection.

7.1.3 The factory inspection is the product quality control inspection performed by the manufacturer before each batch of products leaves the factory.

7.2 Inspection items and contents

7.2.1 Type inspection and factory inspection items shall be carried out in accordance with the requirements of Table 2.

Table 2 Type inspection and factory inspection items

Technical requirements of inspection items Test methods Type inspection Factory inspection frequency Anchor Appearance 5. 1. 1 6. 1 + + each Chemical composition and mechanics Performance, physical properties 5. 2. 1 5. 2. 2 5. 2. 3 6. 2. 1 6. 2. 2 6. 2. 3 +-Take 6 pieces per batch Dimensional deviation 5. 3. 2 6. 3. 1 + + Heat treatment performance 5. 3. 3 6.6. 3. 2 + + Every Flaw detection 5. 3. 4 6.6. 3. 3 +-4. Anticorrosive treatment 3. 5 6.6. 3. 4 +-6 pieces per batch Prestressed carbon fiber board Appearance 5. 1. 2 6. 1 + + each Mechanical properties 2. 4 6.6. 2. 4 +-take 6 pieces per batch Dimensional deviation 5. 3. 2 6. 3. 1 + + each Assembly requirements appearance, size, identification 5. 5. 1 5. 5. 2 5. 5. 3 8. 1-+ + each Static load anchoring performance Anchor efficiency coefficient 4. 1 6. 4. 1 + + each Tensile stress at break, Prestressed carbon fiber board Total strain 5.4.1 6. 4. + +-Take 6 groups per batch 4. Clamping fatigue performance 4. 2 6. 4. + +-Take 3 sets per batch 5. Relaxation performance 4. 3 6.6. 4. 3 +-Take 1 set per batch Note. "+" is an inspection item, and "-" is a non-inspection item.

7.3 Determination of test results

7.3.1 When the heat treatment performance of the anchor is unqualified, resampling shall be repeated for retesting the item.

All the supplied products are inspected one by one before they can be used by qualified ones.

JT/T 1267-2019

7.3.2 When inspecting the static load anchoring performance, clamping fatigue performance and relaxation performance, if the prestressed carbon fiber board is not in the clamping position outside the anchor If it breaks, replace the pre-stressed carbon fiber board and take a new sample for testing; if the test results of a group of test pieces do not meet the requirements, another double test is allowed.

Repeat the number of test pieces. If all the test pieces are qualified, the batch of products can be judged to be qualified; if one set of test pieces does not meet the requirements, the batch the product is unqualified.

7.3.3 If all the factory inspection items meet the requirements, they are judged to be qualified.

8 Marking, packaging, transportation and storage

8.1 Sign

Prestressed carbon fiber board-anchorage should be clearly marked, and its content includes the company logo, anchorage factory number, prestressed carbon fiber board Force length, execution standard number, etc.

8.2 Packaging

Pre-stressed carbon fiber board-Anchorage should be packed in rolls after anti-rust treatment when leaving the factory.

by. The product certificate should be attached to the package. The product certificate includes. product name, specifications, production date, quality certification seal, Plant name and site.

8.3 Transportation and storage

8.3.1 Prestressed carbon fiber board-anchorage During transportation and loading and unloading, avoid direct sunlight, rain, snow soak, and handle it carefully should be subject to mechanical damage such as scratches, throws, severe impacts, and oil and chemical pollution.

8.3.2 Prestressed carbon fiber boards-anchorages should be stored in dry and ventilated warehouses, and should be covered, neatly stacked and kept clean when stored in the open air.

It is strictly forbidden to contact with acids, alkalis, oily organic solvents, etc., and it should be more than 1m away from the heat source, and not directly contact the ground to avoid rust, stain, Mechanical damage and loss.

JT/T 1267-2019

Appendix A

(Informative appendix) Prestressed carbon fiber board-anchor installation instructions Pre-stressed carbon fiber board-anchor installation diagram is shown in Figure A. 1 shown.

Explanation.

1 --- tensioned end anchor; 5 --- reaction plate; 9 --- tensioned end anchor seat; 13 --- beam body.

2 --- prestressed carbon fiber board; 6 --- jack; 10 --- thickened plate at the fixed end anchoring seat;

3 --- fixed end anchors; 7 --- tension rods; 11 --- anchor lock nuts;

4 --- nuts; 8 --- jack block; 12 --- fixed anchoring seat;

Figure A. 1 Prestressed carbon fiber board-anchor installation instructions

JT/T 1267-2019

Appendix B

(Informative appendix) Prestressed carbon fiber board anchor specifications See Table B for the specifications of prestressed carbon fiber plate anchors. 1.

Table B. 1 Prestressed carbon fiber board anchor specifications

Specifications

Prestress

Carbon fiber board

width

Prestress

Carbon fiber board

thickness

Anchor length

Anchor thickness

Tensioned

Anchor width

Fixed end

Anchor width

(MPa)

(MPa)

Force length

At 5m

(MPa)

Force length

At 9m

(MPa)

Force length

At 13m

(MPa)

Force length

At 16m

(MPa)

Force length

At 19m

(MPa)

Force length

At 27m

(MPa)

(MPa)

TBMJ 20 × 1. 0 G 20 1. 0 60 24-45 TBMJ 20 × 1. 0 2 20 1. 0 60 24 1 115-TBMJ 20 × 1. 2 G 20 1. 2 60 24-45 TBMJ 20 × 1. 2 Z 20 1. 2 60 24 1 115-TBMJ 50 × 1. 0 G 50 1. 0 125 4-100 TBMJ 50 × 1. 0 5 50 1. 0 1 25 45 2 10-TBMJ 50 × 1. 4 G 50 1. 4 125 5-100 TBMJ 50 × 1. 4 Z 50 1. 4 125 5 210-TBMJ 50 × 3. 0 G 50 3. 0 125 4-100 TBMJ 50 × 3. 0 Z 50 3. 0 1 25 45 2 10-2 300 >= 2 600 1 800 1 7500 1 6500 1 5500 1 500 1 500 >= 1 8700

Table B. 1 (continued)

Specifications

Prestress

Carbon fiber board

width

Prestress

Carbon fiber board

thickness

Anchor length

Anchor thickness

Tensioned

Anchor width

Fixed end

Anchor width

(MPa)

(MPa)

Force length

At 5m

(MPa)

Force length

At 9m

(MPa)

Force length

At 13m

(MPa)

Force length

At 16m

(MPa)

Force length

At 19m

(MPa)

Force length

At 27m

(MPa)

(MPa)

TBMJ 55 × 3. 3 G 55 3. 3 130 50-120 TBMJ 55 × 3. 3 Z 55 3. 3 130 5 21 24--TBMJ 80 × 1. 0 G 80 1. 0 155 51-130 TBMJ 80 × 1. 0 Z 80 1. 0 1 551 5 21 10-TBMJ 100 × 1. 0 G 100 1. 0 160 51-150 TBMJ 100 × 1. 0 1 100 1. 0 160 51 25--TBMJ 100 × 1. 4 G 100 1. 4 160 51-150 TBMJ 100 × 1. 4 Z 100 1. 4 160 5 21 250-TBMJ 120 × 1. 0 G 120 1. 0 190 55-170 TBMJ 120 × 1. 0 Z 120 1. 0 1 90 55 2 70-TBMJ 150 × 1. 0 G 150 1. 0 240 60-220 TBMJ 150 × 1. 0 Z 150 1. 0 240 60 330--2 300 >= 2 600 1 800 1 7500 1 6500 1 5500 1 500 1 500 >= 1 8700 Appendix C (Normative appendix) Test method for static load anchoring performance of prestressed carbon fiber board-anchorage C. 1 Sample the specimens should use tensioned anchors at one end and fixed anchors at the other end. The stress length of the prestressed carbon fiber board should not be less than 1,000mm.

C. 2 Test methods

C. 2. 1 The static load anchoring performance test of prestressed carbon fiber plate-anchorage should be carried out on a static load tester. The schematic diagram of the test device is shown in Figure C. 1 as shown.

Explanation.

1 --- fixed end anchor; 3 --- prestressed carbon fiber board; 5 --- tensioned end anchor.

2 --- fixed end anchorage connector; 4 --- tensioned end anchorage connector;

Figure C. 1 Schematic diagram of test device for static load anchoring performance of prestressed carbon fiber board-anchorage

C. 2. 2 The test method is as follows.

a) Various measuring instruments should be installed and debugged accurately before loading. Install the fixed-end anchor and the tension-end anchor respectively on the fixed-end anchor.

On the anchor connector and the tension anchor connector, the anchor center is aligned with the center of the connector, and the accuracy should be less than 1% prestress.

Force length of carbon fiber board.

b) Pre-tensioned pre-stressed carbon fiber board-anchorage according to 5% to 10% of fb, and record the force length.

c) In the tensile test, 05mm/s ~ 0. Continuous loading at a speed of 07mm/s, after the tensile stress value meeting the factory inspection is reached, the load is maintained.

5min, stop the test.

d) When breaking test, the value shall be 0. 05mm/s ~ 0. The speed of 07mm/s is continuously loaded to complete failure, so that the load stress reaches fs.

C. 3 Test report

The test report should include the fol...