Traffic and Highway Engineering
5th Edition
ISBN: 9781305156241
Author: Garber, Nicholas J.
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 20, Problem 8P
To determine
The tensile stress imposed at night by wheel load of a concrete pavement.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
A tyre with 230 kPa air pressure distributes a load over an area with circular contact radius of 200 mm. The pavement was constructed with a material that has a modulus of elasticity of 450 MPa and a Poisson's ratio of 0.40.
1.1 Calculate the radial-horizontal stress and deflection at a point on the pavement surface under the center of the tyre load. [Function values table: A = 1 B = 0 C = 0 E = 0.5 H = 2 ]
Wrong answer will be instantly downvoted, don't attempt if not sure .
A cement concrete pavement has a
thickness of 20 cm and has 2 lanes of
7,2 m with a longitudinal joint along
the centre. Assuming allowable working
stress of steel in tension = 1400
kg/cm², Unit weight of concrete =
2400 kg/m³, Co-efficient of friction
of = 1,5. Allowable bond stress in
deformed bars
24.6 kg/cm², Find
the length and spacing of tie bar if
diameter of bar is 1 cm.
=
8. A rigid pavement concrete slab is shown in the given figure. Determine the stress and
also max. deflection due to corner loading
h 10 in.
k = 100 pci
h 10 in,
a = 6 in.
9. Repeat problem (8) for interior loading case as shown in the given figure:
S
k= 100 pci
h = 10 in.
k = 100 pci
a = 6 in.
a 6in.
10,000 lb
%i
4₁
10,000 lb
10. Repeat problem (3) for edge loading cases (Circular or semi circular) as shown in the
given figure:
110,000 lb
%c = ?
D.
?
e = ?
= ?
11. A section of a highway with length of 10 Km was evaluated using the Pavement
Condition Rating Methods. The existing distresses along with this section are presented
in the given photos. The severity and extent levels of each distress are given with the
photo of the specified distress. The PCR form rating is also given.
Chapter 20 Solutions
Traffic and Highway Engineering
Ch. 20 - Portland cement concrete consists of what four...Ch. 20 - List and briefly describe the five main types of...Ch. 20 - What is the main requirement for the water used in...Ch. 20 - Prob. 4PCh. 20 - Prob. 5PCh. 20 - Prob. 6PCh. 20 - Prob. 7PCh. 20 - Prob. 8PCh. 20 - Prob. 9PCh. 20 - Prob. 10P
Ch. 20 - Prob. 11PCh. 20 - Prob. 12PCh. 20 - Repeat Problem 20-12, with the slab containing...Ch. 20 - Prob. 14PCh. 20 - Prob. 15PCh. 20 - Prob. 16PCh. 20 - Prob. 17PCh. 20 - Prob. 18PCh. 20 - An existing rural 4-lane highway is to be replaced...Ch. 20 - Prob. 20PCh. 20 - Prob. 21PCh. 20 - Prob. 22PCh. 20 - Prob. 23PCh. 20 - Prob. 24PCh. 20 - Prob. 25PCh. 20 - Prob. 26PCh. 20 - Prob. 27P
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.Similar questions
- Figure (1) shows a pavement structure composed of three layers with their details. If the HMA and the base layers are combined into one layer with the same total thickness (HMA+base layers), what should be the equivalent elastic of the combined layer modulus so the tensile strain at the bottom of the HMA= 0.0006 in. 30000 Ib 150 psi HMA laver E, = 400,000 psi V,=0.4 6 in E, - 20,000 psi Granular base V,=0.4 20 in layer Subgrade layer E, = 10,000 psi V;=0.4 Attach your answers with used charts or tablesarrow_forwardA cement concrete pavement has a thickness of 24 cm and has two lanes of total width 7.2 m, with a longitudinal joint. Design the dimension and spacing of the bars, using the following data: (i) Allowable working stress in steel in tension = 1400 kg/cm² (ii) Unit weight of concrete = 2400 kg/m³ (iii) Coefficient of friction = 1.5 (iv) Allowable bond stress in concrete = 24.6 kg/cm²arrow_forwardA concrete pavement is subject to a temperature change of AT = 70°F; a coefficient of thermal expansion a = 5.5 ×10 in./in./°F; a concrete shrinkage ɛ = 200 x106; and a granular base with C = 0.8. Determine the joint spacing for an undoweled and a doweled joint having an allowable joint opening of 0.06 and 0.02 in., respectively.arrow_forward
- What is the area of steel required per meter length of Longitudinal joint in a rigid pavement of thickness 24 cm with two lanes of total width of 7 m? Allowable working stress in steel in tension 1400 kg/cm² Unit weight of concrete = 2400 kg/m³ Coefficient of friction 1,5 =arrow_forwardQ2: tire with 700 kPa air pressure distributes a load over an area with a circular contact radius, a, of 130mm. The pavement was constructed with a material that has a modules of elasticity of 345000 kPa and a Poisson ratio of 0.45 and thickness of 30cm. Calculate the radial-horizontal stress and deflection at a point the pavement surface under the center of the tire load. Also, calculate the radial-horizontal stress and deflection at a point at a depth of half pavement layer way from the centre of the tire load. (USE: Ahlvin and Ulery equations).arrow_forwardA concrete pavement is constructed at a temperature of 10°C. The peak summer temperature is 30°C. The coefficient of temperature is 10 x 10^- 6/°C. The gap at the expansion joint is 2.5 cm. The spacing of expansion joint is what.arrow_forward
- A tire load with an air pressure of 132.6 psi and weighing 15,000 lbs is in contact with a flexible pavement that has the following properties: Modulus of elasticity: 45,000 psiPoisson ratio: 0.58 a. Calculate the stress at a depth of 4 in. and radial distance of 6 in. using Boussinesq equation. b. Calculate the vertical stress, radial stress, and deflection on the pavement surface under the center of the load. c. Calculate the vertical stress, radial stress, and deflection at a depth of 4.8 in and radial distance of 7.2 in.arrow_forwardDetermine the thickness of a rigid pavement, which has 3.5 meter width lane. The pavement is to carry a maximum wheel load of 55 kN and provided with dowels. Compressive strength of concrete is 20.5 MPa, and the allowable tensile stress is 6% of the compressive strength. Round up answer. (e.g., 265.8 = 270, 262.3=265)arrow_forwardA pavement element along Thika road of 100x150x200 mm was subjected to an equalall round pressure of 120kn/m2 and axial load of 2.5KN in the X-direction. The changesin length are 0.92mm in X-direction, 0.27mm in the Y-direction and 0.18mm in the Z direction. Calculate thei. Elastic theory ratio, Eii. Poisson’s ratio,iii. Bulk Modulus, Karrow_forward
- The spacing between the contraction joints of a CC pavement is 3.5 m. Determine the stress developed in the pavement (in kg/cm²) due to contraction if the coefficient of friction between the bottom of the pavement and the supporting layer is 1.05 and the unit weight of concrete is 2450 kg/m³.arrow_forwardA cement concrete pavement of a certain thickness laid over a sub grade has a radius of relative stiffness 85 cm. If the thickness of the pavement were to be doubled, what would be the percentage reduction in the flexural stress by the Westergaard's corner load formula under wheel load P. Given that the area of the tyre contact (assumed circular) is 1540 sq. Cm.arrow_forward1. Figure (1) shows a pavement structure composed of three layers with their details. If the HMA and the base layers are combined into one layer with the same total thickness (HMA+base layers), what should be the equivalent elastic of the combined layer modulus so the tensile strain at the bottom of the the HMA= 0.0006 in. 30000 Ib 150 psi E, = ? 6 in HMA layer Ej = 400,000 psi V;=0.4 Granular base E = 20,000 psi V=0.4 20 in layer Subgrade layer E3 = 10,000 psi Vz=0.4 %3Darrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Traffic and Highway EngineeringCivil EngineeringISBN:9781305156241Author:Garber, Nicholas J.Publisher:Cengage Learning
Traffic and Highway Engineering
Civil Engineering
ISBN:9781305156241
Author:Garber, Nicholas J.
Publisher:Cengage Learning