A rigid pavement is to be designed to provide a service life and has an initial PSI of 4.4 and a TSI of 2.5. The modulus of subgrade reaction is determined to be 300 lb/in³. For design, the daily car, pickup truck, and light van traffic is 20,000; and the daily truck traffic consists of 200 passes of single-unit trucks with single and tandem axles, and 410 passes of tractor semi-trailer trucks with single, tandem, and triple axles. The axle weights are cars, pickups, light vans = two 2000-lb single axles (equivalency factor = 0.0002) single-unit trucks = 10,000-lb steering, single axle (equivalency factor = 0.081) = 22,000-lb drive, tandem axle (equivalency factor = 0.305)

Structural Analysis
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Author:KASSIMALI, Aslam.
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Chapter2: Loads On Structures
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Problem 3.
A rigid pavement is to be designed to provide a service life and has an initial PSI of 4.4 and a TSI of 2.5. The modulus of subgrade
reaction is determined to be 300 lb/in³. For design, the daily car, pickup truck, and light van traffic is 20,000; and the daily truck
traffic consists of 200 passes of single-unit trucks with single and tandem axles, and 410 passes of tractor semi-trailer trucks with
single, tandem, and triple axles. The axle weights are
cars, pickups, light vans = two 2000-lb single axles (equivalency factor = 0.0002)
single-unit trucks = 10,000-lb steering, single axle (equivalency factor = 0.081)
= 22,000-lb drive, tandem axle (equivalency factor = 0.305)
tractor semi-trailer trucks = 12,000-lb steering, single axle (equivalency factor = 0.1750)
= 18,000-lb drive, tandem axle (equivalency factor = 0.132)
= 50,000-lb trailer, triple axle (equivalency factor = 3.02)
Transcribed Image Text:Problem 3. A rigid pavement is to be designed to provide a service life and has an initial PSI of 4.4 and a TSI of 2.5. The modulus of subgrade reaction is determined to be 300 lb/in³. For design, the daily car, pickup truck, and light van traffic is 20,000; and the daily truck traffic consists of 200 passes of single-unit trucks with single and tandem axles, and 410 passes of tractor semi-trailer trucks with single, tandem, and triple axles. The axle weights are cars, pickups, light vans = two 2000-lb single axles (equivalency factor = 0.0002) single-unit trucks = 10,000-lb steering, single axle (equivalency factor = 0.081) = 22,000-lb drive, tandem axle (equivalency factor = 0.305) tractor semi-trailer trucks = 12,000-lb steering, single axle (equivalency factor = 0.1750) = 18,000-lb drive, tandem axle (equivalency factor = 0.132) = 50,000-lb trailer, triple axle (equivalency factor = 3.02)
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