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JGJ/T 27-2014   Standard for Test Methods of Welded Joint of Steel Bars (English Version)
Standard No.: JGJ/T 27-2014 Status:valid remind me the status change

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Language:English File Format:PDF
Word Count: 10000 words Price(USD):250.0 remind me the price change

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Standard No.: JGJ/T 27-2014
English Name: Standard for Test Methods of Welded Joint of Steel Bars
Chinese Name: 钢筋焊接接头试验方法标准
Professional Classification: JG    Professional Standard - Building
ICS Classification: 25.160.40 25.160.40    Welded joints and welds 25.160.40
Issued by: MOHURD
Issued on: 2014-06-05
Implemented on: 2014-12-1
Status: valid
Superseding:JGJ/T 27-2001 Standard for Test Methods of Welded Joint of Steel Bars
Language: English
File Format: PDF
Word Count: 10000 words
Price(USD): 250.0
Delivery: via email in 1 business day
1 General Provisions 1.0.1 This standard is formulated with a view to unifying the test methods of welded joints of reinforcing steel bars, inspecting quality of welded joints and accurately evaluating properties of welded joints. 1.0.2 This standard is applicable to tensile test, bend test, shear test, impact test, fatigue test, metallographic test, hardness test and grain size estimation for welded joint of reinforcing steel bar in concrete structure of industrial and civil buildings as well as general structures. 1.0.3 The test of the welded joint of reinforcing steel bar shall strictly comply with relevant safety operation requirements and be provided with necessary preventive measures to ensure test safety. 1.0.4 The test result shall be deemed as invalid if the test machine affects the test data due to fault or misoperation. 1.0.5 The test of the welded joint of reinforcing steel bar shall not only comply with this standard, but also meet the requirements of relevant current national standards. 2 Terms and Symbols 2.1 Terms 2.1.1 tensile test method for welded joint of reinforcing steel bar a method for the tensile test of various welded joints of reinforcing steel bars under ambient temperature 10~35℃ 2.1.2 bend test method for welded joint of reinforcing steel bar a method that support roll devices are adopted for the bend test of flash butt welded joint and gas welded joint of reinforcing steel bar 2.1.3 shear test method for resistance spot welded joint of reinforcing steel bar a method that appropriate special clamping apparatus is selected for the shear test of the resistance spot welded joints in reinforcing steel bar welded frame and welded fabric 2.1.4 Charpy pendulum impact test method for welded joint of reinforcing steel bar a method that the sample is cut and prepared with a V notch according to the specified center position for the impact test of the welded joint of reinforcing steel bar 2.1.5 fatigue test method for welded joint of reinforcing steel bar a method that repeated tensile stress is applied on the sample of the welded joint of reinforcing steel bar and S-N curve is plotted to obtain the fatigue limit 2.1.6 metallographic test method for welded joint of reinforcing steel bar a method that the blank of the welded joint of reinforcing steel bar is made into a sample after cutting, grinding, polishing and corrosion and all zones are subject to macro-observation or micro observation under the microscope 2.1.7 hardness test method for welded joint of reinforcing steel bar a method that the blank of the welded joint of reinforcing steel bar is made into a sample with smooth plane after cutting, grinding and polishing for the Vickers hardness test according to the set measuring point line 2.1.8 estimating grain size method for welded joint of reinforcing steel bar a method that the blank of the welded joint of reinforcing steel bar is made into a sample after cutting, grinding, polishing and corrosion for the grain size estimation according to the set measuring point line 2.2 Symbols 2.2.1 Sample dimension symbols a——the diameter of bending sample; D——the diameter of bending pressure head; d——the diameter of reinforcing steel bar; L——the length of sample; l——the inside distance between two support rolls; lh——the weld length; lj——the clamping length; ls——the length under test; S0——the nominal cross sectional area of reinforcing steel bar (wire); α——the bending angle. 2.2.2 Test symbols of welded joints of reinforcing steel bars Fj——the shear force of reinforcing steel bar welded frame and welded fabric at welding spot; Fm——the maximum force; G——the micro-grain size grade; HV——the Vickers hardness=constant× test force/surface area of press mark; the front represents hardness value while the rear represents test force value (kgf) and test force retention time (s); KV2——the absorption energy of V-notch sample under impact of pendulum edge with the radius of 2mm; Ra——the surface roughness parameter; ReL——the lower yield strength; Rm——the tensile strength; t——the distance between notch centerline and fusion line; Δσ——the stress amplitude of fatigue test (MPa), i.e., the algebraic difference between high stress and low stress; ρ——the stress ratio of fatigue test, i.e., the ratio of the minimum stress to the maximum stress; σn——the conditional fatigue limit, which refers to the maximum stress amplitude (or maximum stress) that the sample structure detail is free from fatigue fracture under the set cycle times. 3 Tensile Test Method for Welded Joint of Reinforcing Steel Bar 3.1 Sample 3.1.1 The dimensions of tensile samples for various welded joints of reinforcing steel bars may be taken according to those specified in Table 3.1.1.
Foreword i 1 General Provisions 2 Terms and Symbols 2.1 Terms 2.2 Symbols 3 Tensile Test Method for Welded Joint of Reinforcing Steel Bar 3.1 Sample 3.2 Test Machine 3.3 Test Method 3.4 Test report 4 Bend Test Method for Welded Joint of Reinforcing Steel Bar 4.1 Sample 4.2 Test Machine 4.3 Test Method 4.4 Test Report 5 Shear Test Method for Resistance Spot Welded Joint of Reinforcing Steel Bar 5.1 Sample 5.2 Test Machine 5.3 Test Method 5.4 Test Report 6 Charpy Pendulum Impact Test Method for Welded Joint of Reinforcing Steel Bar 6.1 Sample 6.2 Test Machine 6.3 Test Method 6.4 Test Report 7 Fatigue Test Method for Welded Joint of Reinforcing Steel Bar 7.1 Sample 7.2 Test Machine 7.3 Test Method 7.4 Test Report 8 Metallographic Test Method for Welded Joint of Reinforcing Steel Bar 8.1 Sample 8.2 Test Machine 8.3 Test Method 8.4 Test Report 9 Hardness Test Method for Welded Joint of Reinforcing Steel Bar 9.1 Sample 9.2 Test Machine 9.3 Test Method 9.4 Test Report 10 Estimating Grain Size Method for Welded Joint of Reinforcing Steel Bar 10.1 Application Scope 10.2 Sample 10.3 Test Machine 10.4 Test Method 10.5 Estimating Grain Size Report Annex A Clamping Apparatus for Tensile Test of T Welded Joint of Reinforcing Steel Bar at Prefabricated Components Annex B Clamping Apparatus for Shear Test of Resistance Spot Welded Joint of Reinforcing Steel Bar Annex C Forms of Test Report for Welded Joint of Reinforcing Steel Bar Explanation of Wording in This Standard List of Quoted Standards
Referred in JGJ/T 27-2014:
*GB 50204-2015 Code for acceptance of constructional quallty of concrete structures
*GB/T 228.1-2010 Metallic materials - Tensile testing - Part 1 : Method of test at room temperature
*GB/T 229-2007 Metallic Materials - Charpy Pendulum Impact Test Method
*GB/T 232-2010 Metallic materials—Bend test
*GB 1499.1-2008/XG1-2012 Steel for the reinforcement of concrete—Part 1:Hot rolled plain bars
*GB 1499.2-2007/XG1-2009 Steel for the reinforcement of concrete—Part 2:Hot rolled ribbed bars
*GB/T 1499.3-2010 Steel for the reinforcement of concrete—Part 3:Welded fabric
*GB/T 3808-2002 Verification of pendulum - Type impact testing machines
*GB/T 4340.1-2009 Metallic materials—Vickers hardness test—Part 1:Test method
*GB/T 6394-2017 Metal - Methods for estimating the average grain size
*GB/T 8170-2008 Rules of rounding off for numerical values & expression and judgement of limiting values
*GB 13014-2013 Quenching and self-tempering ribbed bars for the reinforcement of concrete
*GB 13788-2008 Cold rolled ribbed steel wires and bars
*JGJ 18-2012 Specification for welding amd aceptance of reinforcing steel bars
*JGJ 19-2010 Technical specification for application or cold-drawn low-carbon wires
*JJG 145-2007 Verification Regulation of Pendulum Impact Testing Machines
*JJG 151-2006 Verification Regulation of Metallic Vickers Hardness Testers
*JJG 260-
JGJ/T 27-2014 is referred in:
* JGJ 18-2012 Specification for welding amd aceptance of reinforcing steel bars
Code of China
Standard
JGJ/T 27-2014  Standard for Test Methods of Welded Joint of Steel Bars (English Version)
Standard No.JGJ/T 27-2014
Statusvalid
LanguageEnglish
File FormatPDF
Word Count10000 words
Price(USD)250.0
Implemented on2014-12-1
Deliveryvia email in 1 business day
Detail of JGJ/T 27-2014
Standard No.
JGJ/T 27-2014
English Name
Standard for Test Methods of Welded Joint of Steel Bars
Chinese Name
钢筋焊接接头试验方法标准
Chinese Classification
Professional Classification
JG
ICS Classification
Issued by
MOHURD
Issued on
2014-06-05
Implemented on
2014-12-1
Status
valid
Superseded by
Superseded on
Abolished on
Superseding
JGJ/T 27-2001 Standard for Test Methods of Welded Joint of Steel Bars
Language
English
File Format
PDF
Word Count
10000 words
Price(USD)
250.0
Keywords
JGJ/T 27-2014, JGJ 27-2014, JGJT 27-2014, JGJ/T27-2014, JGJ/T 27, JGJ/T27, JGJ27-2014, JGJ 27, JGJ27, JGJT27-2014, JGJT 27, JGJT27
Introduction of JGJ/T 27-2014
1 General Provisions 1.0.1 This standard is formulated with a view to unifying the test methods of welded joints of reinforcing steel bars, inspecting quality of welded joints and accurately evaluating properties of welded joints. 1.0.2 This standard is applicable to tensile test, bend test, shear test, impact test, fatigue test, metallographic test, hardness test and grain size estimation for welded joint of reinforcing steel bar in concrete structure of industrial and civil buildings as well as general structures. 1.0.3 The test of the welded joint of reinforcing steel bar shall strictly comply with relevant safety operation requirements and be provided with necessary preventive measures to ensure test safety. 1.0.4 The test result shall be deemed as invalid if the test machine affects the test data due to fault or misoperation. 1.0.5 The test of the welded joint of reinforcing steel bar shall not only comply with this standard, but also meet the requirements of relevant current national standards. 2 Terms and Symbols 2.1 Terms 2.1.1 tensile test method for welded joint of reinforcing steel bar a method for the tensile test of various welded joints of reinforcing steel bars under ambient temperature 10~35℃ 2.1.2 bend test method for welded joint of reinforcing steel bar a method that support roll devices are adopted for the bend test of flash butt welded joint and gas welded joint of reinforcing steel bar 2.1.3 shear test method for resistance spot welded joint of reinforcing steel bar a method that appropriate special clamping apparatus is selected for the shear test of the resistance spot welded joints in reinforcing steel bar welded frame and welded fabric 2.1.4 Charpy pendulum impact test method for welded joint of reinforcing steel bar a method that the sample is cut and prepared with a V notch according to the specified center position for the impact test of the welded joint of reinforcing steel bar 2.1.5 fatigue test method for welded joint of reinforcing steel bar a method that repeated tensile stress is applied on the sample of the welded joint of reinforcing steel bar and S-N curve is plotted to obtain the fatigue limit 2.1.6 metallographic test method for welded joint of reinforcing steel bar a method that the blank of the welded joint of reinforcing steel bar is made into a sample after cutting, grinding, polishing and corrosion and all zones are subject to macro-observation or micro observation under the microscope 2.1.7 hardness test method for welded joint of reinforcing steel bar a method that the blank of the welded joint of reinforcing steel bar is made into a sample with smooth plane after cutting, grinding and polishing for the Vickers hardness test according to the set measuring point line 2.1.8 estimating grain size method for welded joint of reinforcing steel bar a method that the blank of the welded joint of reinforcing steel bar is made into a sample after cutting, grinding, polishing and corrosion for the grain size estimation according to the set measuring point line 2.2 Symbols 2.2.1 Sample dimension symbols a——the diameter of bending sample; D——the diameter of bending pressure head; d——the diameter of reinforcing steel bar; L——the length of sample; l——the inside distance between two support rolls; lh——the weld length; lj——the clamping length; ls——the length under test; S0——the nominal cross sectional area of reinforcing steel bar (wire); α——the bending angle. 2.2.2 Test symbols of welded joints of reinforcing steel bars Fj——the shear force of reinforcing steel bar welded frame and welded fabric at welding spot; Fm——the maximum force; G——the micro-grain size grade; HV——the Vickers hardness=constant× test force/surface area of press mark; the front represents hardness value while the rear represents test force value (kgf) and test force retention time (s); KV2——the absorption energy of V-notch sample under impact of pendulum edge with the radius of 2mm; Ra——the surface roughness parameter; ReL——the lower yield strength; Rm——the tensile strength; t——the distance between notch centerline and fusion line; Δσ——the stress amplitude of fatigue test (MPa), i.e., the algebraic difference between high stress and low stress; ρ——the stress ratio of fatigue test, i.e., the ratio of the minimum stress to the maximum stress; σn——the conditional fatigue limit, which refers to the maximum stress amplitude (or maximum stress) that the sample structure detail is free from fatigue fracture under the set cycle times. 3 Tensile Test Method for Welded Joint of Reinforcing Steel Bar 3.1 Sample 3.1.1 The dimensions of tensile samples for various welded joints of reinforcing steel bars may be taken according to those specified in Table 3.1.1.
Contents of JGJ/T 27-2014
Foreword i 1 General Provisions 2 Terms and Symbols 2.1 Terms 2.2 Symbols 3 Tensile Test Method for Welded Joint of Reinforcing Steel Bar 3.1 Sample 3.2 Test Machine 3.3 Test Method 3.4 Test report 4 Bend Test Method for Welded Joint of Reinforcing Steel Bar 4.1 Sample 4.2 Test Machine 4.3 Test Method 4.4 Test Report 5 Shear Test Method for Resistance Spot Welded Joint of Reinforcing Steel Bar 5.1 Sample 5.2 Test Machine 5.3 Test Method 5.4 Test Report 6 Charpy Pendulum Impact Test Method for Welded Joint of Reinforcing Steel Bar 6.1 Sample 6.2 Test Machine 6.3 Test Method 6.4 Test Report 7 Fatigue Test Method for Welded Joint of Reinforcing Steel Bar 7.1 Sample 7.2 Test Machine 7.3 Test Method 7.4 Test Report 8 Metallographic Test Method for Welded Joint of Reinforcing Steel Bar 8.1 Sample 8.2 Test Machine 8.3 Test Method 8.4 Test Report 9 Hardness Test Method for Welded Joint of Reinforcing Steel Bar 9.1 Sample 9.2 Test Machine 9.3 Test Method 9.4 Test Report 10 Estimating Grain Size Method for Welded Joint of Reinforcing Steel Bar 10.1 Application Scope 10.2 Sample 10.3 Test Machine 10.4 Test Method 10.5 Estimating Grain Size Report Annex A Clamping Apparatus for Tensile Test of T Welded Joint of Reinforcing Steel Bar at Prefabricated Components Annex B Clamping Apparatus for Shear Test of Resistance Spot Welded Joint of Reinforcing Steel Bar Annex C Forms of Test Report for Welded Joint of Reinforcing Steel Bar Explanation of Wording in This Standard List of Quoted Standards
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