• Question 26The maximum wheel loadthat the pavement could carry is 120kN. If the contact radius of the wheelis assumed to be 250 mm,andsubgrade bearing capacity isequivalent to 0.24 Megapascals,calculate the subgrade layerthickness of the flexible pavement inmm using the 45-deg cone pressuredistribution method.

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Answered: The maximum wheel load that the…

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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Calculate the following values using the one-layer equation Delta_{x} = (p(1 + mu) * a)/E_{1} * [z/a * A + (1 - mu) * H] for the flexible pavement conditions indicated in Figure a. A at point m b. σ, and e, at point o c. 1,2,3 and Tax at point p Since the surface deflection is required, for the one-layer assumptions noted, A= A, (since-A,, = 0).
Q5. Given the following information: A concrete pavement for two lane highway has doweled joints and no concrete shoulders. The modulus of subgrade reaction is 200 pci (54.2MN/m3), and the modulus of rupture is 650 psi (4.5Mpa). Assume a load safety factor of 1.1. truck weight distribution data for single axle load is as follows: Axle load(kips) 1 Single axles 28 Multiplied by LSF (1.1) 26 24 2 Expected repetitions 3 Erosion analysis Allowable repetitions 30.8 5,913 28.6 12,483 26.4 15,111 22 24.2 102,492 Using a trial thickness of 8 in. Fill in the empty spaces using PCA design method 4 6. Erosion factor Erosion percent 5
What is the average pavement density if the pavement thickness is 300mm by expansion pressure method. The expansion pressure is 0.150kg/cm².
Q2) A wheel load with circular area has a radius 6 in. and uniform pressure 552 kPa is applied on a two-layer system, consists of asphalt layer has an elastic modulus of 350000 psi and stabilized subgrade has elastic modulus 70000 psi. The subgrade can support a maximum vertical stress allowing for allowable number of stress repetitions of 2.5 x 109 before occurring of permanent deformation. Calculate the required thickness of a full-depth pavement, deflection in pavement and the critical tensile strain at the bottom of asphalt layer.
By the Asphalt Institute method, determine the allowable ESAL for a 3.5-inch overlay on an asphalt pavement with a representative rebound deflection of 0.075 inches. E2 = (1.5x70x6.4)/0.062 = 10840 psi Deflection = 0.04621 ESAL = 347000
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The maximum wheel load that the pavement could carry is 120 kN. If the contact radius of the wheel is assumed to be 250 mm, and subgrade bearing capacity is equivalent to 0.24 Megapascals, calculate the subgrade layer thickness of the flexible pavement in mm using the 45-deg cone pressure distribution method. Use the editor to format your answer
A rigid pavement is to be used to carry a wheel load of 50.93 kN. Enough dowels will be used across the joint. What will be the difference in thickness (in mm) between the edge and the center of the pavement? The allowable tensile strength of concrete is 1.39 MPa.
13. Refer to Figure 3.1 attached. In the flexible pavement design example illustrated in the figure, what would be the required structural number if designing for W18=2,000,000 instead?a. 1.5b. 4.3c. 6.1d. 7.3
Show complete solution and clear explanation thanks A rigid pavement of the proposed provincial road is to be used to carry a maximum wheel load of 60KN. Neglect the effect of dowels f'c=20MPa. Allowable tensile stress of concrete pavement is 0.6f'c. Calculate the allowable tensile stress of the concrete pavement and thickness of the pavement
07. Determine Structural Number and terminal serviceability index value of flexible pavement. Given B and G, value for 32-kip tandem-axle loads. B= 0,4 G= -0.22
12. Refer to Figure II-1 attached. A flexible pavement is to be evaluated according to the AASHTO 1972 design guide. The existing pavement has a weighted structural number=3.4, a regional factor=2.0, and a soil support value=4.5. What would be the approximated number of daily equivalent 18-kip axles to be allowed on this road for a 20-year analysis period?a. 10b. 33c. 100d. 1490

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