Old Exam2

Old Exam2 - The cover distances to the center of the bars...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
North Carolina State University Reinforced Concrete Design CE 327 Spring 2004 Exam II – March 16, 2004 [Closed Book, Notes, and Code. Only a single formula sheet allowed. Attach the formula sheet .] A cantilever reinforced concrete beam has a cross section, as shown. The beam carries a uniform live load of 0.6 k/ft and a uniform dead load of 0.4 k/ft in addition to its self-weight . Assume normal weight concrete with a unit weight of 150 lb/ft 3 . The span of the cantilever beam is 10 ft . Concrete has a compressive strength of 4,500 psi . Steel is of Grade 60 . There are two (2) No. 8 bars at the bottom and four (4) No. 9 bars at the top of the section, as shown. Nominal diameters and cross sectional areas of the bars used are listed in the table below.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 2
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 4
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: The cover distances to the center of the bars are given in the figure. 1. What is the cracking moment of the section using the transformed area method? [15 points] 2. What is the stress in tension steel under the applied service loads (un-factored dead, self-weight, and live loads)? [25 points] 3. Can the beam carry the ultimate load (factored dead, self-weight, and live loads)? [50 points] 4. Does the beam satisfy the minimum steel and ductility requirements of the ACI code? [10 points] Table 1. Diameters and Cross Sectional Areas of Bars Used Bar Size Diameter (in) Cross-Sectional Area (in 2 ) No. 8 1.000 0.79 No. 9 1.128 1.00 24” 4” 20” 14” 2.5” 2.5” 4 No. 9 2 No. 8...
View Full Document

This note was uploaded on 05/28/2011 for the course CES 4702 taught by Professor Mirmaran during the Fall '09 term at FIU.

Page1 / 4

Old Exam2 - The cover distances to the center of the bars...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online