Principles Of Foundation Engineering 9e
9th Edition
ISBN: 9781337705035
Author: Das, Braja M.
Publisher: Cengage,
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Question
Chapter 5, Problem 5.11P
(a)
To determine
Find the degree of consolidation for the clay layer due to the sand drains after six months of surcharge application.
(b)
To determine
Find the degree of consolidation for the clay layer due to the combination of vertical and radial drainage.
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A simply supported rectangular RC beam is to carry a uniform factored dead load of 1.2 kip/ft
and a concentrated factored live load of 16 kip at mid-span. The beam self-weight is not included
in these loads. The concrete weighs 135 pcf. The span length is 25 ft. Please find the smallest
section allowed by ACI and design accordingly. Use f c’ = 5,000 psi, f y = 75,000 psi. The
exposure is interior with no weather exposure.
a. Assume an arbitrary self-weight/ft of the beam.
b. Find the maximum factored bending moment in the beam.
c. Set up the moment equation and solve for the beam section.
d. Revise the assumption if needed
Ideal gas
Problems
3-1 The molecular weight of carbon dioxide, CO2, is 44. In an experiment the value y for
CO2 was found to be 1.3. Assuming that CO2 is a perfect gas, calculate the gas
constant, R, and the specific heats at constant pressure and constant volume, Cp, Cv
(0.189 kJ/kg.K; 0.63kJ/kg.K; 0.819kJ/kg.K)
3-2 Oxygen, O2, at 200 bar is to be stored in a steel vessel at 20°C the capacity of the vessel
is 0.04m³. Assuming that O₂ is a perfect gas, calculate the mass of oxygen that can be
stored in the vessel. The vessel is protected against excessive pressure by a fusible plug
which will melt if the temperature rises too high. At what temperature must the plug
melt to limit the pressure in the vessel to 240bar? The molecular weight of oxygen is 32
(10.5 kg; 78.6°C)
3-3 A quantity of a certain perfect gas is compressed from an initial state of 0.085m³, 1 bar
to a final state of 0.034m³, 3.9 bar. The specific heats at constant volume are 0.724
kJ/kg.K, and the specific heats at…
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