CHAPTER 800 FINANCES GENERALLY (71-261, 76-261, 80-157, 80 ...
KENTRACK 4.0: A Railway Structural Design Program -- Tutorial Dr. Jerry G. Rose, P.E. Professor of...
Transcript of KENTRACK 4.0: A Railway Structural Design Program -- Tutorial Dr. Jerry G. Rose, P.E. Professor of...
![Page 1: KENTRACK 4.0: A Railway Structural Design Program -- Tutorial Dr. Jerry G. Rose, P.E. Professor of Civil Engineering 261 Raymond Building University of.](https://reader030.fdocuments.in/reader030/viewer/2022033018/56649d8e5503460f94a773b5/html5/thumbnails/1.jpg)
KENTRACK 4.0: A Railway Structural Design Program -- Tutorial
Dr. Jerry G. Rose, P.E.Professor of Civil Engineering
261 Raymond BuildingUniversity of KentuckyLexington, KY 40506
www.engr.uky.edu/~jrose
2013
Shushu LiuGraduate Research Assistant
Department of Civil EngineeringUniversity of KentuckyLexington, KY 40506
![Page 2: KENTRACK 4.0: A Railway Structural Design Program -- Tutorial Dr. Jerry G. Rose, P.E. Professor of Civil Engineering 261 Raymond Building University of.](https://reader030.fdocuments.in/reader030/viewer/2022033018/56649d8e5503460f94a773b5/html5/thumbnails/2.jpg)
Kentrack
• Kentrack is a computer program designed to analyze a railroad track segment as a structure
• Uses Burmister’s Multi-Layer System and Finite Element Analysis to perform calculations
![Page 3: KENTRACK 4.0: A Railway Structural Design Program -- Tutorial Dr. Jerry G. Rose, P.E. Professor of Civil Engineering 261 Raymond Building University of.](https://reader030.fdocuments.in/reader030/viewer/2022033018/56649d8e5503460f94a773b5/html5/thumbnails/3.jpg)
Introduction
• Critical Stresses and Strains are Calculated at Various Interfaces within the Track Structure
• Design Lives are Predicted• Based on Fatigue Effects (Cumulative Damage
Criteria) of Repeated Loadings• Uses DAMA Program – Developed for Highway
Pavements (Applicability for RR Trackbeds?)
![Page 4: KENTRACK 4.0: A Railway Structural Design Program -- Tutorial Dr. Jerry G. Rose, P.E. Professor of Civil Engineering 261 Raymond Building University of.](https://reader030.fdocuments.in/reader030/viewer/2022033018/56649d8e5503460f94a773b5/html5/thumbnails/4.jpg)
Background
• Originally Kentrack was written in FORTRAN for DOS operation
• Since been upgraded to a Windows Platform• Witczak E* Predictive Model was incorporated• Unit system in 4.0 was expanded to
• English Unit System• SI Unit System
![Page 5: KENTRACK 4.0: A Railway Structural Design Program -- Tutorial Dr. Jerry G. Rose, P.E. Professor of Civil Engineering 261 Raymond Building University of.](https://reader030.fdocuments.in/reader030/viewer/2022033018/56649d8e5503460f94a773b5/html5/thumbnails/5.jpg)
Background
• The previous version included properties of asphalt cements.
• 4.0 has incorporated properties of performance graded asphalt binders,
• and has the option for• AC System• PG System
![Page 6: KENTRACK 4.0: A Railway Structural Design Program -- Tutorial Dr. Jerry G. Rose, P.E. Professor of Civil Engineering 261 Raymond Building University of.](https://reader030.fdocuments.in/reader030/viewer/2022033018/56649d8e5503460f94a773b5/html5/thumbnails/6.jpg)
![Page 7: KENTRACK 4.0: A Railway Structural Design Program -- Tutorial Dr. Jerry G. Rose, P.E. Professor of Civil Engineering 261 Raymond Building University of.](https://reader030.fdocuments.in/reader030/viewer/2022033018/56649d8e5503460f94a773b5/html5/thumbnails/7.jpg)
S4
S4
S2
S4
S4
S4
S3 S2
S2
S4
S3 S2 S1
S2S1 S3
7
S3
S1
S2
S2
P1
1 2 3
S4
S1 S2
S3
S3
4 5
P2
6
S3 S2 S1 S2 S3
P
108
P3
9
P4
S4
Kentrack Theory• Superposition of Loads
P
PS
P
PSS 2
41
2'1
![Page 8: KENTRACK 4.0: A Railway Structural Design Program -- Tutorial Dr. Jerry G. Rose, P.E. Professor of Civil Engineering 261 Raymond Building University of.](https://reader030.fdocuments.in/reader030/viewer/2022033018/56649d8e5503460f94a773b5/html5/thumbnails/8.jpg)
w(P)
y(My)
z
y
xji
l
l
w(P) z
x(Mx)i
x
jy
RAIL:
TIE:
w(P)
i
j
SPRING:
Kentrack Theory• Finite Element Method– Used to calculate the stress and strain in the rail
and tie
![Page 9: KENTRACK 4.0: A Railway Structural Design Program -- Tutorial Dr. Jerry G. Rose, P.E. Professor of Civil Engineering 261 Raymond Building University of.](https://reader030.fdocuments.in/reader030/viewer/2022033018/56649d8e5503460f94a773b5/html5/thumbnails/9.jpg)
En-1 n-1
a
En n
E2
E1
Hzn-2
z2
z
z1
a
qr
Kentrack Theory• Multilayered System– Used to calculate the stress and strain in each layer
![Page 10: KENTRACK 4.0: A Railway Structural Design Program -- Tutorial Dr. Jerry G. Rose, P.E. Professor of Civil Engineering 261 Raymond Building University of.](https://reader030.fdocuments.in/reader030/viewer/2022033018/56649d8e5503460f94a773b5/html5/thumbnails/10.jpg)
Kentrack Theory• Each type of trackbed is composed of different
materials– All-Granular trackbed layers include Ballast,
Subballast, and Subgrade– Asphalt trackbed layers include Ballast, Asphalt
and Subgrade– Combination trackbed layers include Ballast,
Asphalt, Subballast, and Subgrade• Different equations are used to describe the
properties of each material
![Page 11: KENTRACK 4.0: A Railway Structural Design Program -- Tutorial Dr. Jerry G. Rose, P.E. Professor of Civil Engineering 261 Raymond Building University of.](https://reader030.fdocuments.in/reader030/viewer/2022033018/56649d8e5503460f94a773b5/html5/thumbnails/11.jpg)
Kentrack Theory
• Ballast– In new trackbeds the ballast behaves non-linearly– In aged trackbeds the ballast behaves linearly
• Subgrade – Behaves as a linear elastic material
21
KKE )21( 0321 Kz
![Page 12: KENTRACK 4.0: A Railway Structural Design Program -- Tutorial Dr. Jerry G. Rose, P.E. Professor of Civil Engineering 261 Raymond Building University of.](https://reader030.fdocuments.in/reader030/viewer/2022033018/56649d8e5503460f94a773b5/html5/thumbnails/12.jpg)
Kentrack Theory• Asphalt is a visco-elastic material• Viscosity is determined by A-VTS relationship.
log log = A + VTS log TR
= binder viscosity, cP; A, VTS = regression parameters; TR= temperature, Rankine.
• The dynamic modulus depends on the following:– Aggregate passing the No. 200 sieve in %– Aggregate retained on the No.3/4, No.3/8, No.4 Sieve in %– Volume of bitumen %– Volume of air voids %– Asphalt viscosity– Load frequency
![Page 13: KENTRACK 4.0: A Railway Structural Design Program -- Tutorial Dr. Jerry G. Rose, P.E. Professor of Civil Engineering 261 Raymond Building University of.](https://reader030.fdocuments.in/reader030/viewer/2022033018/56649d8e5503460f94a773b5/html5/thumbnails/13.jpg)
Kentrack Theory
• Damage Analysis– Based on minor linear damage analysis criteria– Performance is based on periods• For Kentrack this is four seasons
n
i da
p
orNN
NL
1
1
![Page 14: KENTRACK 4.0: A Railway Structural Design Program -- Tutorial Dr. Jerry G. Rose, P.E. Professor of Civil Engineering 261 Raymond Building University of.](https://reader030.fdocuments.in/reader030/viewer/2022033018/56649d8e5503460f94a773b5/html5/thumbnails/14.jpg)
Kentrack Theory
• Predicted number of repetitions
•Each car equals one repetition
![Page 15: KENTRACK 4.0: A Railway Structural Design Program -- Tutorial Dr. Jerry G. Rose, P.E. Professor of Civil Engineering 261 Raymond Building University of.](https://reader030.fdocuments.in/reader030/viewer/2022033018/56649d8e5503460f94a773b5/html5/thumbnails/15.jpg)
Kentrack Theory• Predicted number of repetitions
Wheel Load = 36000 lb/wheel
For one car the total weight = 36000 lb/wheel x 8 = 286,000 lb/rep / 2000
= 143 ton/rep
The number of repetitions assumed per year = 200,000 rep/yr
The traffic per year = 200,000 rep/yr x 143 ton/rep
= 28,600,000 GT/yr / 1 x 106
= 28.6 MGT/yr
![Page 16: KENTRACK 4.0: A Railway Structural Design Program -- Tutorial Dr. Jerry G. Rose, P.E. Professor of Civil Engineering 261 Raymond Building University of.](https://reader030.fdocuments.in/reader030/viewer/2022033018/56649d8e5503460f94a773b5/html5/thumbnails/16.jpg)
Subgrade Damage Analysis• Excessive permanent deformation controls
failure• Deformation is governed by the vertical
compressive stress on the top of the subgrade• Based on Highway experience• The number of allowable repetitions before
failure
583.3734.3510837.4 scd EN
![Page 17: KENTRACK 4.0: A Railway Structural Design Program -- Tutorial Dr. Jerry G. Rose, P.E. Professor of Civil Engineering 261 Raymond Building University of.](https://reader030.fdocuments.in/reader030/viewer/2022033018/56649d8e5503460f94a773b5/html5/thumbnails/17.jpg)
Asphalt Damage Analysis• Fatigue cracking controls failure• Fatigue cracking is governed by the tensile
strain in the bottom of the asphalt• Based on highway experience• The number of allowable repetitions before
failure
853.0291.30795.0 ata EN
![Page 18: KENTRACK 4.0: A Railway Structural Design Program -- Tutorial Dr. Jerry G. Rose, P.E. Professor of Civil Engineering 261 Raymond Building University of.](https://reader030.fdocuments.in/reader030/viewer/2022033018/56649d8e5503460f94a773b5/html5/thumbnails/18.jpg)
Failure Criteria• All-Granular Trackbed • Vertical Compressive Stress on Subgrade
![Page 19: KENTRACK 4.0: A Railway Structural Design Program -- Tutorial Dr. Jerry G. Rose, P.E. Professor of Civil Engineering 261 Raymond Building University of.](https://reader030.fdocuments.in/reader030/viewer/2022033018/56649d8e5503460f94a773b5/html5/thumbnails/19.jpg)
Failure Criteria• Asphalt Trackbed• Vertical Compressive Stress on Subgrade,
Tensile Strain at Bottom of Asphalt
![Page 20: KENTRACK 4.0: A Railway Structural Design Program -- Tutorial Dr. Jerry G. Rose, P.E. Professor of Civil Engineering 261 Raymond Building University of.](https://reader030.fdocuments.in/reader030/viewer/2022033018/56649d8e5503460f94a773b5/html5/thumbnails/20.jpg)
Kentrack Theory• Combination Trackbed• Vertical Compressive Stress on Subgrade,
Tensile Strain at Bottom of Asphalt
![Page 21: KENTRACK 4.0: A Railway Structural Design Program -- Tutorial Dr. Jerry G. Rose, P.E. Professor of Civil Engineering 261 Raymond Building University of.](https://reader030.fdocuments.in/reader030/viewer/2022033018/56649d8e5503460f94a773b5/html5/thumbnails/21.jpg)
![Page 22: KENTRACK 4.0: A Railway Structural Design Program -- Tutorial Dr. Jerry G. Rose, P.E. Professor of Civil Engineering 261 Raymond Building University of.](https://reader030.fdocuments.in/reader030/viewer/2022033018/56649d8e5503460f94a773b5/html5/thumbnails/22.jpg)
3. Select trackbed type.
1. Enter project title.
2. Select unit system.
4. Click “Submit”.
Kentrack 4.0 Step-by-Step Procedure for All-Granular Trackbed
![Page 23: KENTRACK 4.0: A Railway Structural Design Program -- Tutorial Dr. Jerry G. Rose, P.E. Professor of Civil Engineering 261 Raymond Building University of.](https://reader030.fdocuments.in/reader030/viewer/2022033018/56649d8e5503460f94a773b5/html5/thumbnails/23.jpg)
5. Select rail type.
6. Click Next.
![Page 24: KENTRACK 4.0: A Railway Structural Design Program -- Tutorial Dr. Jerry G. Rose, P.E. Professor of Civil Engineering 261 Raymond Building University of.](https://reader030.fdocuments.in/reader030/viewer/2022033018/56649d8e5503460f94a773b5/html5/thumbnails/24.jpg)
7. Select type of tie.
10. Select cross section for out put.
11. Click “Next”.
8. Select Number of Seasons.
9. Select Seasons for output.
![Page 25: KENTRACK 4.0: A Railway Structural Design Program -- Tutorial Dr. Jerry G. Rose, P.E. Professor of Civil Engineering 261 Raymond Building University of.](https://reader030.fdocuments.in/reader030/viewer/2022033018/56649d8e5503460f94a773b5/html5/thumbnails/25.jpg)
12. Select number of axle loads.
13. Click “Next”.
![Page 26: KENTRACK 4.0: A Railway Structural Design Program -- Tutorial Dr. Jerry G. Rose, P.E. Professor of Civil Engineering 261 Raymond Building University of.](https://reader030.fdocuments.in/reader030/viewer/2022033018/56649d8e5503460f94a773b5/html5/thumbnails/26.jpg)
14. Select number of track layers.
15. Select number of layers for vertical compression.
16. Select layers to compute compression.
17. Click “Next”.
![Page 27: KENTRACK 4.0: A Railway Structural Design Program -- Tutorial Dr. Jerry G. Rose, P.E. Professor of Civil Engineering 261 Raymond Building University of.](https://reader030.fdocuments.in/reader030/viewer/2022033018/56649d8e5503460f94a773b5/html5/thumbnails/27.jpg)
18. Click “Result”.
![Page 28: KENTRACK 4.0: A Railway Structural Design Program -- Tutorial Dr. Jerry G. Rose, P.E. Professor of Civil Engineering 261 Raymond Building University of.](https://reader030.fdocuments.in/reader030/viewer/2022033018/56649d8e5503460f94a773b5/html5/thumbnails/28.jpg)
![Page 29: KENTRACK 4.0: A Railway Structural Design Program -- Tutorial Dr. Jerry G. Rose, P.E. Professor of Civil Engineering 261 Raymond Building University of.](https://reader030.fdocuments.in/reader030/viewer/2022033018/56649d8e5503460f94a773b5/html5/thumbnails/29.jpg)
Kentrack 4.0 Step-by-Step Procedure for Asphalt Underlayment Trackbed
3. Select trackbed type.
1. Enter project title.
2. Select unit system.
4. Click “Submit”.
![Page 30: KENTRACK 4.0: A Railway Structural Design Program -- Tutorial Dr. Jerry G. Rose, P.E. Professor of Civil Engineering 261 Raymond Building University of.](https://reader030.fdocuments.in/reader030/viewer/2022033018/56649d8e5503460f94a773b5/html5/thumbnails/30.jpg)
5. Select rail type.
6. Click “Next”.
![Page 31: KENTRACK 4.0: A Railway Structural Design Program -- Tutorial Dr. Jerry G. Rose, P.E. Professor of Civil Engineering 261 Raymond Building University of.](https://reader030.fdocuments.in/reader030/viewer/2022033018/56649d8e5503460f94a773b5/html5/thumbnails/31.jpg)
7. Select type of tie.
10. Select cross section for out put.
11. Click “Next”.
8. Select Number of Seasons.
9. Select Seasons for output.
![Page 32: KENTRACK 4.0: A Railway Structural Design Program -- Tutorial Dr. Jerry G. Rose, P.E. Professor of Civil Engineering 261 Raymond Building University of.](https://reader030.fdocuments.in/reader030/viewer/2022033018/56649d8e5503460f94a773b5/html5/thumbnails/32.jpg)
12. Select number of axle loads.
13. Click “Next”.
![Page 33: KENTRACK 4.0: A Railway Structural Design Program -- Tutorial Dr. Jerry G. Rose, P.E. Professor of Civil Engineering 261 Raymond Building University of.](https://reader030.fdocuments.in/reader030/viewer/2022033018/56649d8e5503460f94a773b5/html5/thumbnails/33.jpg)
14. Select number of track layers.
17. Select number of layers for vertical compression.
18. Select layers to compute compression.
21. Click “Next”.
15. Select asphalt layers.
19. Select number of layers for horizontal tension.
20. Select layers to compute tension.
16. Select asphalt binder grade.
![Page 34: KENTRACK 4.0: A Railway Structural Design Program -- Tutorial Dr. Jerry G. Rose, P.E. Professor of Civil Engineering 261 Raymond Building University of.](https://reader030.fdocuments.in/reader030/viewer/2022033018/56649d8e5503460f94a773b5/html5/thumbnails/34.jpg)
22. Click “Result”.
![Page 35: KENTRACK 4.0: A Railway Structural Design Program -- Tutorial Dr. Jerry G. Rose, P.E. Professor of Civil Engineering 261 Raymond Building University of.](https://reader030.fdocuments.in/reader030/viewer/2022033018/56649d8e5503460f94a773b5/html5/thumbnails/35.jpg)
![Page 36: KENTRACK 4.0: A Railway Structural Design Program -- Tutorial Dr. Jerry G. Rose, P.E. Professor of Civil Engineering 261 Raymond Building University of.](https://reader030.fdocuments.in/reader030/viewer/2022033018/56649d8e5503460f94a773b5/html5/thumbnails/36.jpg)
Kentrack 4.0 Step-by-Step Procedure for Combination Trackbed
3. Select trackbed type.
1. Enter project title.
2. Select unit system.
4. Click “Submit”.
![Page 37: KENTRACK 4.0: A Railway Structural Design Program -- Tutorial Dr. Jerry G. Rose, P.E. Professor of Civil Engineering 261 Raymond Building University of.](https://reader030.fdocuments.in/reader030/viewer/2022033018/56649d8e5503460f94a773b5/html5/thumbnails/37.jpg)
5. Select rail type.
6. Click Next.
![Page 38: KENTRACK 4.0: A Railway Structural Design Program -- Tutorial Dr. Jerry G. Rose, P.E. Professor of Civil Engineering 261 Raymond Building University of.](https://reader030.fdocuments.in/reader030/viewer/2022033018/56649d8e5503460f94a773b5/html5/thumbnails/38.jpg)
7. Select type of tie.
10. Select cross section for out put.
11. Click “Next”.
8. Select Number of Seasons.
9. Select Seasons for output.
![Page 39: KENTRACK 4.0: A Railway Structural Design Program -- Tutorial Dr. Jerry G. Rose, P.E. Professor of Civil Engineering 261 Raymond Building University of.](https://reader030.fdocuments.in/reader030/viewer/2022033018/56649d8e5503460f94a773b5/html5/thumbnails/39.jpg)
12. Select number of axle loads.
13. Click “Next”.
![Page 40: KENTRACK 4.0: A Railway Structural Design Program -- Tutorial Dr. Jerry G. Rose, P.E. Professor of Civil Engineering 261 Raymond Building University of.](https://reader030.fdocuments.in/reader030/viewer/2022033018/56649d8e5503460f94a773b5/html5/thumbnails/40.jpg)
14. Select number of track layers.
17. Select number of layers for vertical compression.
18. Select layers to compute compression.
21. Click “Next”.
15. Select asphalt layers.
19. Select number of layers for horizontal tension.
20. Select layers to compute tension.
16. Select asphalt binder grade.
![Page 41: KENTRACK 4.0: A Railway Structural Design Program -- Tutorial Dr. Jerry G. Rose, P.E. Professor of Civil Engineering 261 Raymond Building University of.](https://reader030.fdocuments.in/reader030/viewer/2022033018/56649d8e5503460f94a773b5/html5/thumbnails/41.jpg)
22. Click “Result”.
![Page 42: KENTRACK 4.0: A Railway Structural Design Program -- Tutorial Dr. Jerry G. Rose, P.E. Professor of Civil Engineering 261 Raymond Building University of.](https://reader030.fdocuments.in/reader030/viewer/2022033018/56649d8e5503460f94a773b5/html5/thumbnails/42.jpg)
![Page 43: KENTRACK 4.0: A Railway Structural Design Program -- Tutorial Dr. Jerry G. Rose, P.E. Professor of Civil Engineering 261 Raymond Building University of.](https://reader030.fdocuments.in/reader030/viewer/2022033018/56649d8e5503460f94a773b5/html5/thumbnails/43.jpg)
Trackbed TypeSubgrade
Compressive Stress (psi)
Subgrade Service Life
(years)
Asphalt Tensile Strain
Asphalt Service
Life (years)
All-Granular Trackbed 13.37 6.2 n/a n/a
Asphalt Underlayment Trackbed 10.75 22.0 0.000146 25.8
Combination Trackbed 9.75 29.2 0.000127 35.1
Table 1 Critical Outputs for All-Granular, Asphalt Underlayment, and Combination Trackbeds with Wood Ties