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B-WIM  Axle last distribution on the Swedish Road Network Sigurdur Erlingsson VTI, Linköping, Sweden Transportforum Linköp...
Overview <ul><li>M-E design of pavements </li></ul><ul><li>ESAL vs. ALS  </li></ul><ul><li>The Swedish BWIM system </li></...
M-E performance calculations of pavements Climate Traffic Materials Structure Response Damage Accumulation Distress Time D...
ESAL vs. ALS <ul><li>In the  ESAL  approach all axle loads (different magnitudes and number) are converted to an  E quival...
The Swedish BWIM system F(t)
The National Sites  <ul><li>11 locations (always 2 lanes) </li></ul><ul><ul><li>1 week sampling (2007) </li></ul></ul><ul>...
Axle Load Spectra Steering axles Single axles Tandem axles Tridem axles
Axle Load Spectra E4N Mjölby Steering  10756 Single  12780 Tandem  10371 Tridem   4427 Quad  7  38341
The National BWIM measurements in 2007 0.25 0.94 1.14 3.33 Average 0.11 1.67 1.03 3.82 481 Storlångträsk Lv373 C 0.04 0.35...
ALS 2007 – All stations Steering Single Tandem Tridem
Performance Predictions and  ALS Time, years Traffic Granular Base Modulus Each load application 2 8 6 4 0 Subgrade Modulu...
LTPP road  - Rv31 Nässjö
Rv31 Nässjö Base Course Layer
ALS – Forserum 2005 (Rv-31 Nässjö) Rv31 Forserum 2005 Steering  5613 Single  6738 Tandem  4278 Tridem   703 Quad  2 ...
Rv31 – Nässjö performance predictions
Conclusions <ul><li>The M-E Pavement design method represent a major change in the way pavement design is performed. </li>...
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Session 40 Sigurdur Erlingsson

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  • Transcript of "Session 40 Sigurdur Erlingsson"

    1. 1. B-WIM Axle last distribution on the Swedish Road Network Sigurdur Erlingsson VTI, Linköping, Sweden Transportforum Linköping 13 - 14 January, 2010
    2. 2. Overview <ul><li>M-E design of pavements </li></ul><ul><li>ESAL vs. ALS </li></ul><ul><li>The Swedish BWIM system </li></ul><ul><li>ALS </li></ul><ul><li>Performance Predictions </li></ul><ul><li>LTPP – test structure: Rv31 Nässjö </li></ul><ul><li>Conclusions </li></ul>
    3. 3. M-E performance calculations of pavements Climate Traffic Materials Structure Response Damage Accumulation Distress Time Damage
    4. 4. ESAL vs. ALS <ul><li>In the ESAL approach all axle loads (different magnitudes and number) are converted to an E quivalent number of S ingle A xle L oads based on the EALF representing the relative damage of each axle to the damage of a standard axle. </li></ul><ul><li>In the M-E Design approach truck traffic loadings are given in terms of A xle L oad S pectra ( ALS ). This is a more direct and rational approach for the analysis and design of pavement structures to estimate the effects of actual traffic on pavement response and distress. </li></ul>
    5. 5. The Swedish BWIM system F(t)
    6. 6. The National Sites <ul><li>11 locations (always 2 lanes) </li></ul><ul><ul><li>1 week sampling (2007) </li></ul></ul><ul><li>Limitations </li></ul><ul><ul><li>Lane distribution </li></ul></ul><ul><ul><li>Tyre pressure </li></ul></ul><ul><ul><li>Single wheel vs. Dual wheel </li></ul></ul><ul><ul><li>Lateral wander </li></ul></ul>
    7. 7. Axle Load Spectra Steering axles Single axles Tandem axles Tridem axles
    8. 8. Axle Load Spectra E4N Mjölby Steering 10756 Single 12780 Tandem 10371 Tridem 4427 Quad 7  38341
    9. 9. The National BWIM measurements in 2007 0.25 0.94 1.14 3.33 Average 0.11 1.67 1.03 3.82 481 Storlångträsk Lv373 C 0.04 0.35 1.02 2.41 3165 Västerhaninge Rv73 A 0.25 1.01 1.42 3.68 6703 Gärdshyttan Rv50 A 0.30 0.83 1.12 3.25 7645 Landvetter E Rv40 A 0.37 0.83 1.00 3.20 6591 Landvetter W Rv40 A 0.27 0.62 1.25 3.13 6061 Skurup E65 M 0.25 1.13 1.22 3.60 10505 Marieberg E20 M 0.42 0.76 1.23 3.42 3739 Radmansö E18 M 0.06 0.94 1.11 3.11 2120 Torvalla E14 M 0.15 1.23 1.16 3.55 1309 Grundträskån E10 M 0.39 0.62 1.19 3.20 15436 Löddeköping E6 M 0.39 1.02 1.17 3.59 8889 Mjölby S E4 M 0.41 0.96 1.19 3.56 10756 Mjölby N E4 M 0.09 1.19 0.89 3.17 7150 Torsboda E4 M         vehicles Name No. Type Tridem/Steering Tandem/Steering Single/Steering Axle/vehicle No. of Station Road
    10. 10. ALS 2007 – All stations Steering Single Tandem Tridem
    11. 11. Performance Predictions and ALS Time, years Traffic Granular Base Modulus Each load application 2 8 6 4 0 Subgrade Modulus AC Modulus Time Rutting Time Damage
    12. 12. LTPP road - Rv31 Nässjö
    13. 13. Rv31 Nässjö Base Course Layer
    14. 14. ALS – Forserum 2005 (Rv-31 Nässjö) Rv31 Forserum 2005 Steering 5613 Single 6738 Tandem 4278 Tridem 703 Quad 2  17334
    15. 15. Rv31 – Nässjö performance predictions
    16. 16. Conclusions <ul><li>The M-E Pavement design method represent a major change in the way pavement design is performed. </li></ul><ul><li>With the M-E design the performance of pavements can be estimated. </li></ul><ul><li>In M-E design of pavements A xle L oad S pectra is used to characterise the heavy traffic loading. </li></ul><ul><li>A more comprehensive data sampling and analyses of ALS is needed in Sweden if M-E pavement design will be used in the future. </li></ul><ul><li>ALS has been used to predict the rutting performance of a the LTPP segment on Rv31 Nässjö. Acceptable agreement was observed between measurements and calculations. </li></ul>
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