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TB/T 3396.4-2015 PDF English

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TB/T 3396.4-2015: Test Methods for Fastening Systems of High - Speed Railway - Part 4: Test of Fatigue Performance of Fastening Assembly
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TB/T 3396.3   TB/T 3396.5   TB/T 3396.2   

TB/T 3396.4-2015: Test Methods for Fastening Systems of High - Speed Railway - Part 4: Test of Fatigue Performance of Fastening Assembly


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TB RAILWAY INDUSTRY STANDARD ICS 45.080 S 12 Test Methods for Fastening Systems of High – Speed Railway - Part 4.Test of Fatigue Performance of Fastening Assembly Issued on. JULY 15, 2015 Implemented on. FEBRUARY 1, 2016 Issued by. National Railway Administration of the People’s Republic of China

Table of Contents

Foreword... 3 1 Scope... 4 2 Normative References... 4 3 Symbols... 4 4 Principle... 5 5 Test Parameters... 5 6 Test Equipment... 6 7 Test Pieces... 7 8 Test Method for a Single Rail... 7 9 Alternative Test Method... 11 10 Final Inspection... 13 11 Test report... 14

Foreword

TB/T 3396 " Test Methods for Fastening Systems of High-speed Railway" is divided into seven parts. -- Part 1.Determination of Lateral Resistance of Steel Rails; -- Part 2.Determination of Assembly Fastening Pressure; -- Part 3.Determination of Static Stiffness of Assembly; -- Part 4.Test of Fatigue Performance of Fastening Assembly; -- Part 5.Determination of Insulation Resistance; -- Part 6.Effects of Adverse Environmental Conditions; -- Part 7.Pulling Resistance Test of Embedded Parts. This Part is Part 4 of TB/T 3396. This Part was drafted according to the rules given in GB/T 1.1-2009. This Part shall be under the jurisdiction of China Academy of Railway Sciences Standards & Metrology Research Institute. Drafting organization of this Part. China Academy of Railway Sciences Railway Engineering Research Institute. The main drafters of this Part. Zhao Rukang, Xiao Junheng, Fang Hangwei, Xu Shaohui and Li Zirui. Test Methods for Fastening Systems of High – Speed Railway - Part 4.Test of Fatigue Performance of Fastening Assembly

1 Scope

This Part specifies the indoor test methods for fatigue performance of fastening assembly. This Part applies to the fastening systems of high-speed railway.

2 Normative References

The following documents are essential to the application of this standard. For the dated references, only the dated editions are applicable to this standard. For the undated references, their latest editions (including all amendments) are applicable to this standard. TB/T 3396.1 Test Methods for Fastening Systems of High-speed Railway - Part 1.Determination of Lateral Resistance of Steel Rails TB/T 3396.2 Test Methods for Fastening Systems of High-speed Railway - Part 2.Determination of Assembly Fastening Pressure TB/T 3396.3 Test methods for fastener systems of high-speed railway - Part 3. Determination of Static Stiffness of Assembly

3 Symbols

The following symbols apply to this document.

4 Principle

Cyclic load is applied to the rail head at the loading position and direction, shown in Figure 1.

5 Test Parameters

5.1 Maximum load of cyclic loads

6 Test Equipment

6.1 Steel rail A short rail section, approximately 0.5 m or 1 m in length (as shown in Figure 2, cut off 15 mm at rail-waist of 60 kg/m steel rail, total height is 161 mm, the rail bottom shall not be untrimmed). The steel rail shall be free from stripping or rust on the surface. The rail bottom shall not be polished by repeated tests. Figure 2 Steel Rail Section 6.2 Loading equipment The equipment is capable of reaching 100 kN under the frequency 3 Hz ~ 5 Hz during a single bearing surface test. Its loading capacity shall be increased accordingly when 2 or 4 bearing surfaces are required to be loaded simultaneously. 6.5 Loading frame The loading frame is capable of distributing equally the load applied to two steel rails according to the action line required; it is capable of applying cyclic load on steel rail head according to the loading position and direction, shown in Figure 1. 6.7 Load sensor The instrument measuring the load applied on steel rail or loading frame, its accuracy is class I.

7 Test Pieces

7.1 Sleeper The sleeper, ½-sleeper or slab rail element that has fastener embedded parts or reserved holes (all named sleeper in the test method). The bearing surface of sleeper shall not be trimmed for the test. 7.2 Fastener A complete set of fastener that includes all components.

8 Test Method for a Single Rail

8.1 General The test method for single rails is applicable to the test in which a single rail is fixed to one end of sleeper or a half sleeper with fasteners. No adjustment, re-screwing or trimming of fastening assembly shall be made during the test. 8.2 Test procedure 8.3 Assembly fastening pressure Determine the assembly fastening pressure of fasteners according to the method specified in TB/T 3396.2. 8.4 Rail lateral resistance Determine the rail lateral resistance of fasteners according to the method specified in TB/T 3396.1. 8.5 Assembly static rigidity Determine the static rigidity of fastening assembly according to the method specified in TB/T 3396.3. 8.7 Repeated test After 10×106 loading cycles, remove load from all fastening components used for the test; conduct the repeated test according to the following sequence after placing them aside for 24 h. assembly static rigidity (see 8.5), rail vertical resistance (see 8.4), and assembly fastening pressure (see 8.3).

9 Alternative Test Method

9.1 General The alternative test method is applicable to the test in which the fastening system is used to fix two rails on one or two sleepers. No adjustment, re-screwing or trimming shall be made for the fastening assembly during the test. 9.2 Test procedure 9.3 Assembly fastening pressure Determine the assembly fastening pressure of fasteners according to the method specified in TB/T 3396.2; take the average value of two fastening systems for the assembly fastening pressure. 9.4 Rail vertical resistance Determine the rail vertical resistance of fasteners according to the method specified in TB/T 3396.1; take the average value of two fastening systems for the rail vertical resistance. 9.7 Repeated test After 10×106 loading cycles, remove load; all fastening components used for the test are placed aside for 24 h; conduct the repeated test according to the following sequence. assembly static rigidity (see 9.5), rail vertical resistance (see 9.4), and assembly fastening pressure (see 9.3).

10 Final Inspection

At the end of the test, disassemble the fasteners; check whether the fastening components are damaged by visual inspection; and meanwhile, check the reliability of all embedded parts in sleepers.

11 Test report

The test report shall include at least the following content. TB/T 3396.4-2015 TB RAILWAY INDUSTRY STANDARD ICS 45.080 S 12 Test Methods for Fastening Systems of High – Speed Railway - Part 4.Test of Fatigue Performance of Fastening Assembly Issued on. JULY 15, 2015 Implemented on. FEBRUARY 1, 2016 Issued by. National Railway Administration of the People’s Republic of China

Table of Contents

Foreword... 3 1 Scope... 4 2 Normative References... 4 3 Symbols... 4 4 Principle... 5 5 Test Parameters... 5 6 Test Equipment... 6 7 Test Pieces... 7 8 Test Method for a Single Rail... 7 9 Alternative Test Method... 11 10 Final Inspection... 13 11 Test report... 14

Foreword

TB/T 3396 " Test Methods for Fastening Systems of High-speed Railway" is divided into seven parts. -- Part 1.Determination of Lateral Resistance of Steel Rails; -- Part 2.Determination of Assembly Fastening Pressure; -- Part 3.Determination of Static Stiffness of Assembly; -- Part 4.Test of Fatigue Performance of Fastening Assembly; -- Part 5.Determination of Insulation Resistance; -- Part 6.Effects of Adverse Environmental Conditions; -- Part 7.Pulling Resistance Test of Embedded Parts. This Part is Part 4 of TB/T 3396. This Part was drafted according to the rules given in GB/T 1.1-2009. This Part shall be under the jurisdiction of China Academy of Railway Sciences Standards & Metrology Research Institute. Drafting organization of this Part. China Academy of Railway Sciences Railway Engineering Research Institute. The main drafters of this Part. Zhao Rukang, Xiao Junheng, Fang Hangwei, Xu Shaohui and Li Zirui. Test Methods for Fastening Systems of High – Speed Railway - Part 4.Test of Fatigue Performance of Fastening Assembly

1 Scope

This Part specifies the indoor test methods for fatigue performance of fastening assembly. This Part applies to the fastening systems of high-speed railway.

2 Normative References

The following documents are essential to the application of this standard. For the dated references, only the dated editions are applicable to this standard. For the undated references, their latest editions (including all amendments) are applicable to this standard. TB/T 3396.1 Test Methods for Fastening Systems of High-speed Railway - Part 1.Determination of Lateral Resistance of Steel Rails TB/T 3396.2 Test Methods for Fastening Systems of High-speed Railway - Part 2.Determination of Assembly Fastening Pressure TB/T 3396.3 Test methods for fastener systems of high-speed railway - Part 3. Determination of Static Stiffness of Assembly

3 Symbols

The following symbols apply to this document.

4 Principle

Cyclic load is applied to the rail head at the loading position and direction, shown in Figure 1.

5 Test Parameters

5.1 Maximum load of cyclic loads

6 Test Equipment

6.1 Steel rail A short rail section, approximately 0.5 m or 1 m in length (as shown in Figure 2, cut off 15 mm at rail-waist of 60 kg/m steel rail, total height is 161 mm, the rail bottom shall not be untrimmed). The steel rail shall be free from stripping or rust on the surface. The rail bottom shall not be polished by repeated tests. Figure 2 Steel Rail Section 6.2 Loading equipment The equipment is capable of reaching 100 kN under the frequency 3 Hz ~ 5 Hz during a single bearing surface test. Its loading capacity shall be increased accordingly when 2 or 4 bearing surfaces are required to be loaded simultaneously. 6.5 Loading frame The loading frame is capable of distributing equally the load applied to two steel rails according to the action line required; it is capable of applying cyclic load on steel rail head according to the loading position and direction, shown in Figure 1. 6.7 Load sensor The instrument measuring the load applied on steel rail or loading frame, its accuracy is class I.

7 Test Pieces

7.1 Sleeper The sleeper, ½-sleeper or slab rail element that has fastener embedded parts or reserved holes (all named sleeper in the test method). The bearing surface of sleeper shall not be trimmed for the test. 7.2 Fastener A complete set of fastener that includes all components.

8 Test Method for a Single Rail

8.1 General The test method for single rails is applicable to the test in which a single rail is fixed to one end of sleeper or a half sleeper with fasteners. No adjustment, re-screwing or trimming of fastening assembly shall be made during the test. 8.2 Test procedure 8.3 Assembly fastening pressure Determine the assembly fastening pressure of fasteners according to the method specified in TB/T 3396.2. 8.4 Rail lateral resistance Determine the rail lateral resistance of fasteners according to the method specified in TB/T 3396.1. 8.5 Assembly static rigidity Determine the static rigidity of fastening assembly according to the method specified in TB/T 3396.3. 8.7 Repeated test After 10×106 loading cycles, remove load from all fastening components used for the test; conduct the repeated test according to the following sequence after placing them aside for 24 h. assembly static rigidity (see 8.5), rail vertical resistance (see 8.4), and assembly fastening pressure (see 8.3).

9 Alternative Test Method

9.1 General The alternative test method is applicable to the test in which the fastening system is used to fix two rails on one or two sleepers. No adjustment, re-screwing or trimming shall be made for the fastening assembly during the test. 9.2 Test procedure 9.3 Assembly fastening pressure Determine the assembly fastening pressure of fasteners according to the method specified in TB/T 3396.2; take the average value of two fastening systems for the assembly fastening pressure. 9.4 Rail vertical resistance Determine the rail vertical resistance of fasteners according to the method specified in TB/T 3396.1; take the average value of two fastening systems for the rail vertical resistance. 9.7 Repeated test After 10×106 loading cycles, remove load; all fastening components used for the test are placed aside for 24 h; conduct the repeated test according to the following sequence. assembly static rigidity (see 9.5), rail vertical resistance (see 9.4), and assembly fastening pressure (see 9.3).

10 Final Inspection

At the end of the test, disassemble the fasteners; check whether the fastening components are damaged by visual inspection; and meanwhile, check the reliability of all embedded parts in sleepers.

11 Test report

The test report shall include at least the following content. ......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
Image 1     Image 2     Image 3     

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