CE 334 Week 11 Bond and Development Length Homework Quiz I need you to do these concrete questions. I will upload PDF files it may help you to understand t

CE 334 Week 11 Bond and Development Length Homework Quiz I need you to do these concrete questions. I will upload PDF files it may help you to understand the questions. CE 334 –
Bond and Development Length Homework Quiz
Name:________________
1. Name two ways that bond failures can be avoided.
2. What causes the bond stress to vary in magnitude along the length of the rebar?
3. List three tests used to measure bond strength.
4. Name three effects that contribute to the bonding of the steel to the concrete.
5. Which effect is not neglected in developing the equation for bond strength of the steel to the
concrete?
6. List five effects that the splitting resistance of the bond strength depends on.
CE 334 –
Bond and Development Length Homework Quiz
Name:________________
7. True or false: Bond strength is directly proportional to √f’c.
8. What is a pull-out failure mode and when can it happen?
9. What do we call the minimum embedment length of a bar in concrete required to develop the
bar’s yield stress fy?
10. What is a bar’s anchorage length?
11. A bar with a 36 inch development length has an anchorage length of 6 feet from a point of
maximum bar stress to the bar end. Is the bar at risk for a bond failure?
12. Why is the development length equation different for bars in tension than for bars in
compression?
13. How is the tension development length equation derived?
CE 334 –
Bond and Development Length Homework Quiz
Name:________________
14. What is the value of ψt for the #9 bars in the cross section shown ?
15. The bars in Question #14 are epoxy coated. What is the combined value of ψt ψe? Assume the
center to center spacing of the bars is 3 inches.
16. What is the value of ψs for the bars in Question #14?
17. What is the value of
+

for the bars in Question #14? Assume the center to center spacing of
the bars is 3 inches.
18. Which of the Simplified Tension Development Length equations from ACI Table 25.4.2.2 would
apply to the bars in Question #14? Assume the center to center spacing of the bars is 3 inches.
CE 334 –
Bond and Development Length Homework Quiz
Name:________________
19. True or false: The development length as calculated in Question #18 is very conservative.
20. True or false: Hooks and headed bars are both used to reduce the development lengths of bars
in tension, although the development length is generally smaller for a headed bar than for a
hook.

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