TB/T 1878-2002 PDF EnglishUS$100.00 · In stock · Download in 9 seconds
TB/T 1878-2002: Prestressed concrete sleeper fatigue test methods Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid TB/T 1878: Historical versions
TB/T 1878-2002: Prestressed concrete sleeper fatigue test methods---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/TBT1878-2002TB RAILWAY INDUSTRY STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA Replacing TB/T 1878-1987 Fatigue test method for prestressed concrete sleepers ISSUED ON: MAY 17, 2002 IMPLEMENTED ON: DECEMBER 01, 2002 Issued by: Ministry of Railway of PRC Table of ContentsForeword ... 3 1 Scope ... 4 2 Test equipment and measuring tools ... 4 3 Test pattern ... 4 4 Test steps and methods ... 6 5 Test report form ... 7 Appendix A (Informative) Fatigue strength inspection record of prestressed concrete sleeper ... 8 Fatigue test method for prestressed concrete sleepers1 ScopeThis standard specifies the fatigue test method for standard gauge railway prestressed concrete sleepers (including switch sleepers, wide sleepers, bridge sleepers). This standard is applicable to fatigue tests for scientific research, new product development, product quality inspection of standard gauge railway prestressed concrete sleepers (including switch sleepers, wide sleepers, bridge sleepers).2 Test equipment and measuring tools2.1 The fatigue test of prestressed concrete sleepers (hereinafter referred to as sleepers) shall use a fatigue testing machine, which has an accuracy level 1 and a loading vibration frequency between 4 Hz ~ 8 Hz. 2.2 Use a 20X reading magnifying glass, to observe the crack width. The reading accuracy is 0.01 mm; there is lighting equipment.3 Test pattern3.1 The test pattern of the section under the rail is as shown in Figure 1.4 Test steps and methods4.1 The sleepers for fatigue test shall be selected from the batches whose static load, appearance and demolding strength are all qualified in the exit-factory inspection; 6 sleepers shall be selected each time. 4.2 The fatigue test shall be carried out after the age of the sleeper is 28d. The 28d compressive strength of the concrete in the test batch shall meet the design strength requirements. 4.3 Fatigue test shall be carried out on 3 under-rail sections and 3 middle sections; only one section shall be made for each sleeper. 4.4 Characteristic value ρ of fatigue load cycle 4.6 During the fatigue test, attention shall be paid to observe whether the loading meets the requirements of the test pattern; correct it if necessary. 4.7 The fatigue test shall be carried out continuously. If the test is stopped due to irresistible factors in the middle, it shall be subject to the 2 million accumulated fatigues; it shall be indicated in the report. 4.8 Test results 4.8.1 After the sleeper is unloaded after 2 x 106 fatigue cycles, use a scale magnifying glass, to observe both sides of the test section, within 5 minutes after returning to zero. The observed position is the position of the outer row of steel wires in the tension area, where the maximum residual crack width shall not exceed 0.05 mm. 4.8.2 After the sleeper has undergone 2 x 106 fatigue cycles, the failure test shall be carried out; its failure strength shall not be lower than 80% of the design failure strength; the design failure strength shall be given by the design drawing. The sign of the failure state is that the crack width reaches 1.5 mm, OR where there are two or more cracks AND the maximum crack width reaches 1.0 mm. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of English version of TB/T 1878-2002 be delivered?Answer: The full copy PDF of English version of TB/T 1878-2002 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.Question 2: Can I share the purchased PDF of TB/T 1878-2002_English with my colleagues?Answer: Yes. The purchased PDF of TB/T 1878-2002_English will be deemed to be sold to your employer/organization who actually paid for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. www.ChineseStandard.us -- TB/T 1878-2002 -- Click this link and select your country/currency to pay, the exact amount in your currency will be printed on the invoice. Full PDF will also be downloaded/emailed in 9 seconds.Question 5: Should I purchase the latest version TB/T 1878-2002?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version TB/T 1878-2002 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.How to buy and download a true PDF of English version of TB/T 1878-2002?A step-by-step guide to download PDF of TB/T 1878-2002_EnglishStep 1: Visit website https://www.ChineseStandard.net (Pay in USD), or https://www.ChineseStandard.us (Pay in any currencies such as Euro, KRW, JPY, AUD).Step 2: Search keyword "TB/T 1878-2002". Step 3: Click "Add to Cart". If multiple PDFs are required, repeat steps 2 and 3 to add up to 12 PDFs to cart. Step 4: Select payment option (Via payment agents Stripe or PayPal). Step 5: Customize Tax Invoice -- Fill up your email etc. Step 6: Click "Checkout". Step 7: Make payment by credit card, PayPal, Google Pay etc. After the payment is completed and in 9 seconds, you will receive 2 emails attached with the purchased PDFs and PDF-invoice, respectively. Step 8: Optional -- Go to download PDF. Step 9: Optional -- Click Open/Download PDF to download PDFs and invoice. See screenshots for above steps: Steps 1~3 Steps 4~6 Step 7 Step 8 Step 9 |
