Question 3An undowelled rigidpavement in a subdivision roadwayhas thickness equivalent to 300 mm.What should be the allowable tensilestrength of concrete in MPa in orderto support a wheel load equivalent to9 kN?• Question 12The length of a spiral curve isequivalent to 124 meters and it'sradius is 56 meters. If the speed ofthe vehicle traversing the curve is 69kph, what is the rate of change ofcentripetal acceleration in m/s^2?

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Answered: uestion 3 An undowelled rigid avement…

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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Q# Superelevation in horizontal curve of road is responsible for your safety. Explain?
• Question 17 The minimum radius of the curve is 216 meters, and the value of coefficient of friction and superelevation combined is equal to 0.8. What should be the maximum design vehicle speed at the curve in order for road users to safely traverse it? • Question 18 Calculate the design thickness in mm (rounded to the nearest tens) at the edge of a rigid pavement with dowels if the: Allowable tensile strength of concrete = 3.0 MPa Wheel load = 117 kN
Determine the thickness of the rigid pavement of the proposed Llanera Road to carry a maximum wheel load of 60KN neglect the effect of dowels fc' = 20MP.. Allowable tensile stress of concrete pavement is 0.06fc'. answer should be in mm.
Compute the modulus of elasticity of the pavement if the modulus of elasticity of the subgrade is90 MPa with a stiffness factor of 0.55 a.540.865 MPa b.539.865 MPa c.538.865 MPa d.541.865 MPa
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
The braking distance of a car from 80 km/h is 40 m assuming the pavement is level. (a) if the pavement is with 6° inclination, what will be the braking distance (in meter) of the car going up from 80km/h? (b) and if the car is going down at 4% inclination, what is its braking distance (in meter) from 80km/h? Note: Assume the breaking force is not dependent of the grade.
A 33 mm thick flexible pavement carrles a static wheel load having a circular contact area of the tire ls 75 476 m㎡, the transmitted load is distributed across the wider area of the sub grade at an angle of 45°. The subgrade bearing value Is 180.0 Kpa, while that of the base is 450,0 Kpa.Sketch &Design the thickness of the base.
The braking distance of a car from 90 km/h is 40 m assuming the pavement is level. (a) if the pavement is with 5° inclination, what will be the braking distance (in meter) of the car going up from 90km/h? (b) and if the car is going down at 6% inclination, what is its braking distance (in meter) from 90km/h? Note: Assume the breaking force is not dependent of the grade. Select the correct response(s): O 42.71 O 45.78 O 52.34 O 43.25 O 54.12 O 46.77 O 34.30 O 36.05 O 44.13 O 40.95 O 41.96 O 50.90 O O O O O O O O O
A flexible pavement carries a static wheel load of 53.5kN. The circular contact area of the tire is 85806 square mm and the transmitted load is distributed across a wide area of the subgrade at an angle of 45 degrees. The subgrade bearing value is 0.14MPA, while that of the base is 0.41Mpa. Design the thickness of pavement and that of the base. answer should be in mm. Identity first the thickness of the pavement next the thickness of the base.
A six-lane concrete roadway is being designed for a metropolitan area. This roadwaywill be constructed on a subgrade with an effective modulus of subgrade reaction k of170 lb/in3. The ESAL used for the design period is 2.5 106. Using the AASHTOdesign method, determine a suitable thickness of the concrete pavement (to thenearest 1⁄2 inch), provided that the working stress of the concrete to be used is650 lb/in2 and the modulus of elasticity is 5 106 lb/in2. Assume the initial serviceability is 4.75 and the terminal serviceability is 2.5. Assume the overall standard deviation, So, as 0.35, the load transfer coefficient J as 3.2, the drainage coefficient, Cd as1.15, and R as 95%.20-14 An existing rural four-lane highway is to be replaced by a six-lane divided expressway(three lanes in each direction). Traffic volume data on the highway indicate that theAADT (both directions) during the first year of operation is 24,000 with the followingvehicle mix and axle loads.Passenger cars…
yuality, PiOVide surtace uralmage and friction, and correct surface distresses and irregularities. 9. The slab cracking is an unplanned longitudinal or diagonal structural crack(s) that extend through the depth of the slab. 10. A heavily rutted pavement can generally left untreated depending on the root cause of failure. True or False
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uestion 3 An undowelled rigid avement in a subdivision roadway as thickness equivalent to 300 mm. /hat should be the allowable tensile crength of concrete in MPa in order o support a wheel load equivalent to kN? tion 10