+ HO 1000 m/ultra/courses/_141784_1/outline/assessment/_4948560_1/overview/attempt/_29515843_1?courseld=_141784_1 206 minutes remaining 3 OF 3 QUESTIONS REMAINING A beam is shown below. It is desired to find the steel reinforcements at the most critical section in bending. The cross section of the concrete beam is 500 mm by 700 mm with an effective cover of 60 mm for the reinforcements. f'c = 28 MPa, fs 140 MPa, n = 9. Determine the required number of 36 mm ø tension bars and the required number of 32 mm o compression bars at the maximum moment = に 6m W=270Kn/M 3m Prompts Answers Select match Location of neutral axis at balanced condition (mm) Select match Maximum Moment (kN-m) Select match Balanced Moment Capacity) 4 Select match Number of 36mm Tension bars (5 Select match Number of 32mm Compression bars Questions Filter (3) ▼ K First < Previous Next D Last > Esport Series 27" Gaming Monitor ESVN FreeSync CARE HDMI VISION Search N-VISION

+ HO 1000 m/ultra/courses/_141784_1/outline/assessment/_4948560_1/overview/attempt/_29515843_1?courseld=_141784_1 206 minutes remaining 3 OF 3 QUESTIONS REMAINING A beam is shown below. It is desired to find the steel reinforcements at the most critical section in bending. The cross section of the concrete beam is 500 mm by 700 mm with an effective cover of 60 mm for the reinforcements. f'c = 28 MPa, fs 140 MPa, n = 9. Determine the required number of 36 mm ø tension bars and the required number of 32 mm o compression bars at the maximum moment = に 6m W=270Kn/M 3m Prompts Answers Select match Location of neutral axis at balanced condition (mm) Select match Maximum Moment (kN-m) Select match Balanced Moment Capacity) 4 Select match Number of 36mm Tension bars (5 Select match Number of 32mm Compression bars Questions Filter (3) ▼ K First < Previous Next D Last > Esport Series 27" Gaming Monitor ESVN FreeSync CARE HDMI VISION Search N-VISION

Steel Design (Activate Learning with these NEW titles from Engineering!)

6th Edition

ISBN:9781337094740

Author:Segui, William T.

Publisher:Segui, William T.

Chapter9: Composite Construction

Section: Chapter Questions

Problem 9.8.9P: Use the composite beam tables and select a W-shape and stud anchors for the following conditions: ...

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Estimate the transverse tensile strength of the concrete in Problem 12.6.
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. 9.6-4 For the beam of Problem 9.4-1, a. Compute the deflections that occur before and after the concrete has cured. b. If the total deflection after the concrete has cured exceeds L240 select another steel shape using either LRFD or 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. 9.6-2 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.
Compute the nominal shear strength of an M1211.8 of A572 Grade 65 steel.
A tensile test was performed on a metal specimen having a circular cross section with a diameter 0. 510 inch. For each increment of load applied, the strain was directly determined by means of a strain gage attached to the specimen. The results are, shown in Table: 1.5.1. a. Prepare a table of stress and strain. b. Plot these data to obtain a stress-strain curve. Do not connect the data points; draw a best-fit straight line through them. c. Determine the modulus of elasticity as the slope of the best-fit line.
A beam must be designed to the following specifications: Span length = 35 ft Beam spacing = 10 ft 2-in. deck with 3 in. of lightweight concrete fill (wc=115 pcf) for a total depth of t=5 in. Total weight of deck and slab = 51 psf Construction load = 20 psf Partition load = 20 psf Miscellaneous dead load = 10 psf Live load = 80 psf Fy=50 ksi, fc=4 ksi Assume continuous lateral support and use LRFD. a. Design a noncomposite beam. Compute the total deflection (there is no limit to be checked). b. Design a composite beam and specify the size and number of stud anchors required. Assume one stud at each beam location. Compute the maximum total deflection as follows: 1. Use the transformed section. 2. Use the lower-bound moment of inertia.
Compute the nominal shear strength of an M107.5 of A572 Grad 65 steel.
List three common categories of stress that must be known before a beam size can be determined.
In Example Problem 12.1, a uniaxial composite material is made into a circular rod Vbith a 1.27-cm diameter from 70 volume percent continuous carbon fibers and 30 volume percent epoxy. The rod is subject to an axial force of 100,000 N. The composite matcrial in Example Problem 12.1 is to be replaced with a less expensive composite made of 70 volume percent continuous E-glass fibers and 30 volume percent epoxy. The elastic moduli are 5 GPa for the epoxy resin and 72.4 GPa fos the E-glass. (a) Compare the elastic modulus, composite strain, fiber and matrix stresses, and density of this composite with the carbon epoxy composite in Example Problem 12.1. Usc the density of UHM carbon, and assume the density of the epoxy is 1.2g/cm3 . (b) Can both the E-glass fiber and matrix withstand the applied force?
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.
What is the main value in pre-stressing pre-cast concrete columns?