please answer b through e if possible. If not please answer at least b and c. thank you neutral axis of cracked section measured from top of beam, x =,inIer =in(e) Compute the flexural stresses. Compressive stress of concrete at the top of the beam andtensile stresses at the centroid of the top and bottom layers of steel bars.Bending stress of concrete in extreme compression f. =psiBending stress of top layer steel bars in tension f: =psiBending stress of bottom layer steel bars in tension f: =psi Transformed Area Method (Concrete Cracked - Elastic Stresses Stage)Problem 2) Modified Problem 2.13 (page 55, McCormac and Brown, 10th Ed.)Change f'c to 5 ksi and cross-sectional properties See figures below.30 kipW = 2 kip/ftA10 ft.20 ft.30 ft.f'. = 5000 psi30 in.36 in.8 #9 bars3 in.3 in.16 in.(a) Find the reactions at A and B. RA =kip, RB =kipft*kip(b) Determine the maximum applied moment. Mmax =(c) Calculate the cracking moment of the beam and verify that the beam has cracked under theapplied loads. Mer =ft*kipin3Moment of inertia of gross section, Ig =Modulus of Rupture f, =(d) Calculate the cracked moment of inertia. Note that you will need to first calculate the concretepsimodulus of elasticity and modular ratio. Do not use the textbook modular ratio of n=8.Ec =psi (use the simplified equation for normal weight concrete)Modular ratio, n =

The following diagram is shown in the given question. that will help to understand the basic…

Transformed Area Method (Concrete Cracked - Elastic Stresses Stage) Problem 2) Modified Problem 2.13 (page 55, McCormac and Brown, 10th Ed.) Change f.to 5 ksi and cross-sectional properties See figures below. 30 kip W = 2 kip/ft A В 10 ft. 20 ft. 30 ft. f' = 5000 psi 30 in. 36 in. 8 #9 bars 3 in. 3 in. 16 in. (a) Find the reactions at A and B. RA = kip, RB = kip (b) Determine the maximum applied moment. Mmax = ft*kip (c) Calculate the cracking moment of the beam and verify that the beam has cracked under the applied loads. Mg = Moment of inertia of gross section, Ig =, ft*kip in3 Modulus of Rupture f, = psi

Transformed Area Method (Concrete Cracked - Elastic Stresses Stage) Problem 2) Modified Problem 2.13 (page 55, McCormac and Brown, 10th Ed.) Change f.to 5 ksi and cross-sectional properties See figures below. 30 kip W = 2 kip/ft A В 10 ft. 20 ft. 30 ft. f' = 5000 psi 30 in. 36 in. 8 #9 bars 3 in. 3 in. 16 in. (a) Find the reactions at A and B. RA = kip, RB = kip (b) Determine the maximum applied moment. Mmax = ftkip (c) Calculate the cracking moment of the beam and verify that the beam has cracked under the applied loads. Mg = Moment of inertia of gross section, Ig =, ftkip in3 Modulus of Rupture f, = psi

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.

See similar textbooks

Similar questions

Portland cement concrete consists of what four primary elements?
What is the main value in pre-stressing pre-cast concrete columns?
Why is concrete classified and measured separately in different categories?
A W1422 acts compositely with a 4-inch-thick floor slab whose effective width b is 90 inches. The beams are spaced at 7 feet 6 inches, and the span length is 30 feet. The superimposed loads are as follows: construction load = 20 psf, partition load = 10 psf, weight of ceiling and light fixtures = 5 psf, and live load = 60 psf, A992 steel is used, and fc=4 ksi. Determine whether the flexural strength is adequate. a. Use LRFD. b. Use ASD.
Note For Problems 9.6-1 through 9.6-5, use the lower-bound moment of inertia for deflection of the composite section. Compute this as illustrated in Example 9.7. 9.6-1 Compute the following deflections for the beam in Problem 9.2-1. a. Maximum deflection before the concrete has cured. b. Maximum total deflection after composite behavior has been attained.
Note For Problems 9.6-1 through 9.6-5, use the lower-bound moment of inertia for deflection of the composite section. Compute this as illustrated in Example 9.7. 9.6-2 Compute the following deflections for the beam in Problem 9.2-2. a. Maximum deflection before the concrete has cured. b. Maximum total deflection after composite behavior has been attained.
Note For Problems 9.6-1 through 9.6-5, use the lower-bound moment of inertia for deflection of the composite section. Compute this as illustrated in Example 9.7. 9.6-5 For the beam of Problem 9.4-2. a. Compute the deflections that occur before and after the concrete has cured. b. It the live toad deflection exceeds L360 , select another steel shape using either LRFD or ASD.
The data in Table 1.5.3 were obtained from a tensile test of a metal specimen with a rectangular cross section of 0.2011in.2 in area and a gage length (the length over which the elongation is measured) of 2.000 inches. The specimen was not loaded to failure. a. Generate a table of stress and strain values. b. Plot these values and draw a best-fit line to obtain a stress-strain curve. c. Determine the modulus of elasticity from the slope of the linear portion of the curve. d. Estimate the value of the proportional limit. e. Use the 0.2 offset method to determine the yield stress.
According to Figure 5-20, is ii possible to completely separate one of the four materials from the other three? Explain your answer.
In concrete work, Fuller and Thompson (1907) suggested that a dense packing of grains can be achieved if the percent finer (p) and grain size (D) are related by the following equation, where n is a constant varying in the range of 0.3-0.6. Dmax is the size of the largest grain within the soil. p=(DDmax)n100 This equation is sometimes used in roadwork for selecting the aggregates. a. For n = 0.5, show that the soil is well graded. b. If n = 0.5 and Dmax = 19.0 mm, find the percentages of gravel, sand, and fines within the soil. Use the Unified Soil Classification System.
The results of a tensile test are shown in Table 1.5.2. The test was performed on a metal specimen with a circular cross section. The diameter was 3 8 inch and the gage length (The length over which the elongation is measured) was 2 inches. a. Use the data in Table 1.5.2 to produce a table of stress and strain values. b. Plot the stress-strain data and draw a best-fit curve. c. Compute the, modulus of elasticity from the initial slope of the curve. d. Estimate the yield stress.