A six-lane major highway with three lanes in each direction will be built using concrete pavement. The lane distribution factor of traffic is 0.40. Traffic survey on the highway indicates that the AADT (average annual daily traffic) during the first year of operation is 24,000 with the following vehicle mixes and axle loads. Passenger cars = 50% 2-axle single-unit trucks (two single axles at 12,000 lb/axle) = 40% 3-axle single trailer trucks (three single axles at 16,000 lb/axle) = 10% The vehicle mix is expected to remain the same throughout the design life of 20 years, although traffic is expected to grow at a rate of 3.5% annually. Using the AASHTO 1993 design procedure, determine the minimum depth of concrete pavement required for the design period of 20 years. The following design parameters should be used. (40 points) P₁ = 4.5 P₁ = 2.5 S = 650 lb/in.² E = 5 x 106 lb/in.² k-130 lb/in.³ J = 3.2 C₁ = 1.0 S = 0.3 R = 95%

A six-lane major highway with three lanes in each direction will be built using concrete pavement. The lane distribution factor of traffic is 0.40. Traffic survey on the highway indicates that the AADT (average annual daily traffic) during the first year of operation is 24,000 with the following vehicle mixes and axle loads. Passenger cars = 50% 2-axle single-unit trucks (two single axles at 12,000 lb/axle) = 40% 3-axle single trailer trucks (three single axles at 16,000 lb/axle) = 10% The vehicle mix is expected to remain the same throughout the design life of 20 years, although traffic is expected to grow at a rate of 3.5% annually. Using the AASHTO 1993 design procedure, determine the minimum depth of concrete pavement required for the design period of 20 years. The following design parameters should be used. (40 points) P₁ = 4.5 P₁ = 2.5 S = 650 lb/in.² E = 5 x 106 lb/in.² k-130 lb/in.³ J = 3.2 C₁ = 1.0 S = 0.3 R = 95%

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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An existing rural 4-lane highway is to be replaced by a 6-lane divided expressway (3 lanes in each direction). Traffic volume data on the highway indicate that the AADT (both directions) during the first year of operation is 24,000 with the following vehicle mix and axle loads. Passenger cars = 50 percent 2-axle single-unit trucks (12,000 lb/axle) = 40 percent 3-axle single-unit trucks (16,000 lb/axle) = 10 percent The vehicle mix is expected to remain the same throughout the design life of 20 years, although traffic is expected to grow at a rate of 3.5 percent annually. Using the AASHTO design procedure, determine the minimum depth of concrete pavement required for the design period of 20 years.