a) Consider a simply supported reinforced concrete beam 30ft long with a wu of 6 kip/ft. If fc’ is 4000 psi, determine if this beam has cracked if it is 36 inches high, 12 inches wide, and has 4 No. 9 bars of 60 ksi rebar at a depth of 33 in from the top. b) regardless of your answer in part a) list three things you could change about the design of this beam to prevent the cracking?

a) Consider a simply supported reinforced concrete beam 30ft long with a wu of 6 kip/ft. If fc’ is 4000 psi, determine if this beam has cracked if it is 36 inches high, 12 inches wide, and has 4 No. 9 bars of 60 ksi rebar at a depth of 33 in from the top. b) regardless of your answer in part a) list three things you could change about the design of this beam to prevent the cracking?

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter20: Design Of Rigid Pavements

Section: Chapter Questions

Problem 27P

See similar textbooks

Similar questions

Find the magnitude of distributed load w (lb/ft) that would result in flexural cracking of the concrete beam shown below. fc = 5000 psi Modulus of Rupture = 7.5√f'c w (lb/ft) 14' -10%- Beam Cross-Section 20"
What value of uniformly distributed live load w is required to produce initial cracking of the U- shaped cantilever beam shown in the figure below. The beam is constructed of normal weight concretewith f' 25MPaand f 420MPa.
1. Determine the cracking moment for the figure shown if it is a normal weight concrete with f'c=4,000psi. 8 in. 8 in. 24 in. 3 #10 8 in. 3 in. 6 in. |5 in. -16 in.
中国移动 VPN 1:00 PM © 40% A simply supported rectangular beam with dimension of h = 550 mm and b = 250 mm is subjected to bending moment. The bending moment under the quasi-permanent combination of load effect, M, = 72 kNm. Concrete strength grade is C30, and the beam is reinforced with 3 18 bars. The environment classification is I. Requirement: determine the maximum crack width.
A certain concrete beam has the following data: Cracked Moment of Inertia, I¬cr = 7,800 x 10^6 mm^4 Grossed Moment of Inertia, Ig = 9,000 x 10^6 mm^4 Applied Moment, Ma = 80 kN-m Cracking Moment, Mcr = 100 kN-m 28. Determine the effective moment of inertia.
3. Per the following, are the breaks acceptable if the concrete is 4000 psi? 4110 Set 1 4050 4150 Set 2 4200 3810 Set 3 3750
FLEXURAL ANALYSIS CONCRETE UNCRACKED Problem: Determine the cracking moment for the section shown below if = 4000 psi and the modulus of rupture f, = 7.5/f'. 22" 30" 3 #9• 4" te 12–
A cylinder having a diameter of 4.01 inches was tested or compressive strength. The maximum it took before rupture was 72,340 lb. Determine the maximum load that a similar cylinder with diameter 5.3 inches would take before rupture.
24. Refer to Table 12.6 and Figure 12.12 attached. What would be the fatigue damage according to the PCA design method for 50,000 repetitions of a 26-kip single axle, a subgrade k=200 psi/in, a flexural strength=600 psi, and a 6.5-inch thick concrete slab without concrete shoulders? Select the best answer.a. 0.0b. 0.5c. 0.75d. 10.0 25. Refer to Table 12.8 and Figure 12.13 attached. What would be the erosion damage according to the PCA design method for the same conditions stated in Question 24 above? Select the best answer.a. 0.0b. 0.125c. 0.835d. 10.0
1. What are the mainly two types of failures occur in beams? Tension zone Load
Question 8 Tension controlled failure in reinforced concrete beams as per NSCP 2015 is when the tensile strain of rebars is 0.005 or larger. True False
CRACK AND UNCRACKED STAGE OF CONCRETE 1. What is noncracked, linear stage? 2. What is cracked, linear stage?