Exam 1, June 18, 2009
Instructions: please read all the questions carefully and follow instructions below.
Please begin each problem on a separate page
Please put your name on each page
Please state any assumptions the y
CE 206 Exam 1 Name:
Part II: Quantitative Multiple Choice Questions (12 points total 1. Select the msgger that is most nearly correct.
7. (3 points) How long does it take for an investment to double if it earns 5% APR?
A 12.5years . _ w a
CE 206 Exam 1 Name:
Pan m: wgrku; Problems Show all your work . Partial crgt may be Maw (15 mints total)
11. (5 points) Ifyou want to accrue $100,000 in 10 years in your savings account that pays
2% APR compounded qumtetly, how much should you deposit eac
CE 206 Exam 1 Name; as. my?
Part I: ualitarive Multi le Choice True/False or Short Answer 6 oints total
l. (1 point) It is difcult to put dollar values on intangible consequences, so they should generally not be
considered in a rational decision mak
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9.15 Using the column interaction diagrams in Appendix A (
f c = 4000 psi and f y = 60,000 psi) with t
approximately equal to 2%, design square columns with equal reinforcement on all sides to carry
each of the following loads and select the longitudinal
5.1 A rectangular beam secon is 10 in. wide and has a structural depth of 13.5 in. Given that t he
concrete strength is 4000 psi and there is no shear reinforcement in the secon, determine the
nominal shear capacity allowed by the ACI Code.
b 10 in
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8.1. A rectangular beam is 16 in. wide and 29 in. deep. For
f c = 4000 psi and f y = 60,000 psi,
determine the required spacing of No. 4 (No. 13) closed stirrups for a factored shear of 80 kips and
factored torsional moment of 50 ft-kips. The stirrup cent
6.1 through 6.6 (based on the beam in Fig. 4.15, Example 4.13, fy = 60 ksi)
For the No. 6 bars:
cb 2.5 in.
cb 1.5 + 0.5 + 0.75 2 =
cb 10 2 (1.5 + 0.5 + 0.75 2 ) 2 =
Use: 2.375 in.
For the No. 9 bars:
cb 2.75 in.
cb 2.5 2 =