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26. Refer to Figure 8 Design 1A attached. For the design of a 4-lane interstate highway, the damage analysis shown in the figure was performed for a 9.5-inch thick slab according to the PCA design approach. This analysis indicates that the 9.5-inch thick slab: a. Only satisfies the fatigue damage condition b. Only satisfies the erosion damage condition c. Satisfies both fatigue damage and erosion damage conditions d. None of the above

26. Refer to Figure 8 Design 1A attached. For the design of a 4-lane interstate highway, the damage analysis shown in the figure was performed for a 9.5-inch thick slab according to the PCA design approach. This analysis indicates that the 9.5-inch thick slab: a. Only satisfies the fatigue damage condition b. Only satisfies the erosion damage condition c. Satisfies both fatigue damage and erosion damage conditions d. None of the above

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
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26. Refer to Figure 8 Design 1A attached. For the design of a 4-lane interstate highway, the damage analysis shown in the figure was performed for a 9.5-inch thick slab according to the PCA design approach. This analysis indicates that the 9.5-inch thick slab: a. Only satisfies the fatigue damage condition b. Only satisfies the erosion damage condition c. Satisfies both fatigue damage and erosion damage conditions. d. None of the above the
Transcribed Image Text:26. Refer to Figure 8 Design 1A attached. For the design of a 4-lane interstate highway, the damage analysis shown in the figure was performed for a 9.5-inch thick slab according to the PCA design approach. This analysis indicates that the 9.5-inch thick slab: a. Only satisfies the fatigue damage condition b. Only satisfies the erosion damage condition c. Satisfies both fatigue damage and erosion damage conditions. d. None of the above the
Calculation of Pavement Thickness Project Design 14, four-lane Interstate, rural Trial thickness Subbase-subgrade k Modulus of rupture, MR. Load safety factor, LSF Axia load, kips 1 Single Axles 26 24 20 18 16 Multiplied by LSF /-2 12 36 32 24 2 20 16 36.0 33.4 3/2 Tandem Axles 28.8 26.6 2440 21.6 130 4310 14690 30,140 64410 104 900 235800 307, 200 192 422,500 16.8 596,900 14.4 1.837,000 Expected repetitions 62.4 3 in. pci pai 24,320 42,820 528 124900 48.0 375,900 432 985800 30. 930,200 35.6 1256000 28. A 984900 240 1227000 192 1356,000 Doweled joins Concrete shoulder: yes Design period 20 years in untreated subbase Fatigue analysis Allowable repetitions 4 27000 77.000 230,000 4200,000 Unlimited 8. Equivalent stress. 206 9. Stress ratio factor 03/7 / 1100.000 Valaited 47 Fatigue percent 7 Total S 192 11. Equivalent stress 12. Stress ratio factor 0.295 28.3 19.1 13.1 5.4 0 Figure 8 Design 1A 19 no N 62.870 Erosion analysis Allowable repetitions 6 10. Erosion factor 4,500,000 2,200,000 3,500,000 5,900,000 1,000,000 23.000.000 64000,000. Unlimited 70 13. Erosion factor 920.000 1500 000 2500.000 4 600.000 9500,000 24000000 PAG Unlimited 7 Total Damage, percent 7 2.59 4 0.4 07 0.9 11 10 So 05 0 2.79 23 5.2 9.3 00 38.9%
Transcribed Image Text:Calculation of Pavement Thickness Project Design 14, four-lane Interstate, rural Trial thickness Subbase-subgrade k Modulus of rupture, MR. Load safety factor, LSF Axia load, kips 1 Single Axles 26 24 20 18 16 Multiplied by LSF /-2 12 36 32 24 2 20 16 36.0 33.4 3/2 Tandem Axles 28.8 26.6 2440 21.6 130 4310 14690 30,140 64410 104 900 235800 307, 200 192 422,500 16.8 596,900 14.4 1.837,000 Expected repetitions 62.4 3 in. pci pai 24,320 42,820 528 124900 48.0 375,900 432 985800 30. 930,200 35.6 1256000 28. A 984900 240 1227000 192 1356,000 Doweled joins Concrete shoulder: yes Design period 20 years in untreated subbase Fatigue analysis Allowable repetitions 4 27000 77.000 230,000 4200,000 Unlimited 8. Equivalent stress. 206 9. Stress ratio factor 03/7 / 1100.000 Valaited 47 Fatigue percent 7 Total S 192 11. Equivalent stress 12. Stress ratio factor 0.295 28.3 19.1 13.1 5.4 0 Figure 8 Design 1A 19 no N 62.870 Erosion analysis Allowable repetitions 6 10. Erosion factor 4,500,000 2,200,000 3,500,000 5,900,000 1,000,000 23.000.000 64000,000. Unlimited 70 13. Erosion factor 920.000 1500 000 2500.000 4 600.000 9500,000 24000000 PAG Unlimited 7 Total Damage, percent 7 2.59 4 0.4 07 0.9 11 10 So 05 0 2.79 23 5.2 9.3 00 38.9%
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