Structural Analysis
Structural Analysis
6th Edition
ISBN: 9781337630931
Author: KASSIMALI, Aslam.
Publisher: Cengage,
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Calculate layer thickness for section AA

GIVEN: SN1= 3.2

SN2= 3.8

SN3 = 4.5

Question - 2: For the road network and traffic in question-1, design pavement structure for road section
AA and road section BB using AASHTO 1993. The material properties are shown in Figure 2.1.
The following additional information are provided:
Design reliability is 90%, standard deviation, So is 0.40.
CBR value of subgrade is 11.
Quality of drainage is good and percentage of time pavement is exposed to moisture level approaching
saturation is 1-5%.
Initial serviceability is 4.2 and terminal serviceability is 2.0 for both the collector and local roads.
Consider the traffic opening year as 2020.
E1 = 450,000 psi
V₁=0.3
E2 = 40,000 psi
V₂=0.35
E3 = 20,000 psi
V₂=0.35
V₂=0.35
Surface
Base
Subbase
Subgrade
D₁ Asphalt Layer
D₂ m₂
D3 m3
infinite
Unbound Layer
Unbound Layer
Figure 2.1: Pavement structure to be designed
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Transcribed Image Text:Question - 2: For the road network and traffic in question-1, design pavement structure for road section AA and road section BB using AASHTO 1993. The material properties are shown in Figure 2.1. The following additional information are provided: Design reliability is 90%, standard deviation, So is 0.40. CBR value of subgrade is 11. Quality of drainage is good and percentage of time pavement is exposed to moisture level approaching saturation is 1-5%. Initial serviceability is 4.2 and terminal serviceability is 2.0 for both the collector and local roads. Consider the traffic opening year as 2020. E1 = 450,000 psi V₁=0.3 E2 = 40,000 psi V₂=0.35 E3 = 20,000 psi V₂=0.35 V₂=0.35 Surface Base Subbase Subgrade D₁ Asphalt Layer D₂ m₂ D3 m3 infinite Unbound Layer Unbound Layer Figure 2.1: Pavement structure to be designed
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