A. Calculate the stress in the concrete at the top and bottom extreme fibers under a positive bending moment of 78 kip, in psi (neglect steel reinforcement) B. If f'c= 3200 psi and normal weight of concrete is used, does cracking occurs? What is the maximum uniformly distributed load the beam can carry if it is used as a simple beam with a 26 ft span without exceeding the modulus of rupture of the concrete, in Ib/ft?

A. Calculate the stress in the concrete at the top and bottom extreme fibers under a positive bending moment of 78 kip, in psi (neglect steel reinforcement) B. If f'c= 3200 psi and normal weight of concrete is used, does cracking occurs? What is the maximum uniformly distributed load the beam can carry if it is used as a simple beam with a 26 ft span without exceeding the modulus of rupture of the concrete, in Ib/ft?

Materials Science And Engineering Properties

1st Edition

ISBN:9781111988609

Author:Charles Gilmore

Publisher:Charles Gilmore

Chapter12: Composite Materials

Section: Chapter Questions

Problem 12.7P: Estimate the transverse tensile strength of the concrete in Problem 12.6.

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Question

Please give me the correct solution of this problem in principle of reinforced/prestressed concrete

A. Calculate the stress in the concrete at the top and bottom extreme fibers under a
positive bending moment of 78 kip, in psi (neglect steel reinforcement)
B. If f'c= 3200 psi and normal weight of concrete is used, does cracking occurs? What
is the maximum uniformly distributed load the beam can carry if it is used as a
simple beam with a 26 ft span without exceeding the modulus of rupture of the
concrete, in lb/ft?
250 mm
80 mm
130 mm
80 min
80 mm

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A. Calculate the stress in the concrete at the top and bottom extreme fibers under a positive bending moment of 78 kip, in psi (neglect steel reinforcement) B. If fc= 3200 psi and normal weight of concrete is used, does cracking occurs? What is the maximum uniformly distributed load the beam can carry if it is used as a simple beam with a 26 ft span without exceeding the modulus of rupture of the concrete, in lb/ft? 250 mm 80 mm 130 mm 80 mm 80 mm
If the compressive strength of the concrete is 4 ksi and the yield strength of steel is 60 ksi, the value of that should be used in computing the design moment strength oMn for the beam section should be 23.5 in 1.5424 0.65 0.48 0.9 3#9 14 in 26 in
Please give the correct answer and complete solution of this problem
CASE:A rectangular beam has the dimensions (see Fig.1) b = 15 in.,h = 30 in., and d = 27.37 in. and is reinforced with three No.9 bars. The concrete compressive strength fc' is 4000 psi, and the tensile strength in bending (modulus of rupture) is 475 psi. The yield point of the steel fy is 60,000 psi, the stress-strain curves of the materials being those of Fig.2. Determine the stresses caused by a bending moment M = 45 ft-kips.Question1:Check this case, would the concrete of the beam crack? Please calculate the strengths of those two materials in this beam.Question2:Suppose the beam under this case is subject to a bending moment M = 110 ft-kips (rather than45ft-kips as previously). Calculate the relevant properties and stresses.Question3:Determine the nominal moment Mn at which the beam of this case will fail. Question4:Have a comparison of the calculation results with those of three questions.
The flexural tensile strength of M25 grade of concrete, in N/mm², as per IS:456-2000 is A 0.5 B 5 C 2.25 D 3.5
I neeed
Please give the correct dolution and answer of this problem in principle of reinforced/presstressed concrete
Assuming the concrete is uncracked, compute the flexure stresses in the extreme fibers of the beam as shown in the figure for a bending moment of 34 kN-m. The concrete has an f' of 27.60 MPa; determine also the cracking moment of the section. (Use 0.62 1 = 0.70 in calculating the modulus of rupture). Dimensions are in millimeter. 380 455 3 #9 bars (A, = 3.00 in.2) 75 300
42. Permissible tensile strength of concrete, M150 is: A) 150kg/cm² C) 150N/mm² B) 15kg/cm D) 15N/mm2
2. According to Section 10.2.3 of AC, the maximum usable strain at extreme concrete compression fiber shall be assumed equal to a. 0.004 b. 0.005 c. 0.003 d. 0.002 e. 0.001 f. 0.008
Read the question carefully and give me right solution according to the question. Don't copy from other websites solution
a. A split-tension test was conducted on a concrete cylinder with a 150 mm diameter and 300 mm length. Theload that split the cylinder is 268.5 KN. Calculate the splitting tensile strength (fct) of the concrete. b.The third-point flexural strength test was conducted on a flexural beam of 150 mm by 150 mm cross sectionand 450mm span. The maximum load at failure was 29.2 KN. Calculate the flexural strength of the conc c. The ultimate tensile strength of geogrid is 270 KN/m, and the combined reduction factor for reinforcementapplication is 3.0. Determine the allowable tensile strength. d.A compacted sample of Asphalt cement contains 5.3% asphalt binder by weight of total mix, and its bulkspecific gravity is 2.428. The theoretical maximum specific gravity of the mix is 2.592, and the bulk specificgravity of the aggregate is 2.703. Determine the VMA, VTM and VFA of the Asphalt Ce