Traffic And Highway Engineering
5th Edition
ISBN: 9781133605157
Author: Garber, Nicholas J., Hoel, Lester A.
Publisher: Cengage Learning,
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Chapter 14, Problem 17P
The following table shows the stations and ordinates for a mass diagram. The free-haul distance is 600 ft. Overhaul cost is $12 per station yard.
(a) Use the method of moments to compute the additional cost that must be paid to the contractor.
(b) Sketch the ground profile if the finished grade of this roadway section is level (0 percent).
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Problem 4 (Apx Method)
Determine (approximately) the force in each member of the truss. Assume the diagonals can support
both tensile and compressive forces.
3 m
50 kN
F
000
40 kN
000
000
000
000
000
000
E
000
000
000
000
000
B
3 m
20 kN
D
000
000
000
000
C
3 m
Problem 5 (Apx Method)
Determine (approximately) the force in each member of the truss in problem 4. Assume the diagonals
cannot support compressive forces.
The single degree of freedom (SDOF) system the acceleration at the base (excitation) and the acceleration at the roof (response) of the SDOF system was recorded with sampling rate 50 Hz (50 samples per second, or dt= 0.02 seconds). The file ElCentro.txt includes the two columns of acceleration data. The first column lists the acceleration at the base of the SDOF system. The second column lists the acceleration at the roof of the SDOF system. (a) Plot the time histories of the recorded accelerations at the base and at the roof of the SDOF system. (b) Compute the acceleration, velocity and displacement time histories of the roof of the SDOF system subjected to the recorded base acceleration using the Central Difference method. Plot the accel- eration, velocity and displacement time histories. Plot the restoring force, the damping force, and the inertia force time histories. Compare the recorded acceleration time history at the roof of the SDOF with the acceleration that you computed…
Problem 2 (Using force method)
Determine the force in each member of the truss. E = 29000 ksi
3 k
1.5 in²
4 ft
1.5 in²
1.5 in²
2 in²
6 k
D
1.5 in²
3 ft
2 in²
B
Chapter 14 Solutions
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