Steel Design (Activate Learning with these NEW titles from Engineering!)
6th Edition
ISBN: 9781337094740
Author: Segui, William T.
Publisher: Cengage Learning
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Chapter 9, Problem 9.8.1P
To determine
The flexural strength of the composite section.
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A composite floor system consists of steel beams supporting a formed steel deck and concrete slab. The deck is shown in Figure P, and the total depth from bottom of deck to top of slab is 61⁄2 inches. Lightweight concrete is used (unit weight =115 pcf), and the 28-day compressive strength is 4 ksi. The deck and slab combination weighs 53 psf. The beams are spaced at 12 feet, and the span length is 40 feet. There is a 20psf construction load, a partition load of 20 psf, other dead load of 10 psf, and a live load of 160 psf. The maximum permissible live-load deflection is Ly/360. Use the composite beam tables and select a W-shape with Fy= 50 ksi. Design the stud anchors. Use partial composite action and a lowerbound moment of inertia. a. Use LRFD. b. Use ASD
DETERMINE THE MOMENT OF INERTIA USING THE GIVEN X-AXIS OF THE SHADED COMPOSITE AREA AND STRUCTUCTURAL BUILT-UP SECTION. show fbd
Q. Composite beam.
Chapter 9 Solutions
Steel Design (Activate Learning with these NEW titles from Engineering!)
Ch. 9 - Prob. 9.1.1PCh. 9 - Prob. 9.1.2PCh. 9 - Prob. 9.1.3PCh. 9 - Prob. 9.1.4PCh. 9 - Prob. 9.1.5PCh. 9 - Prob. 9.1.6PCh. 9 - A W1422 acts compositely with a 4-inch-thick floor...Ch. 9 - Prob. 9.2.2PCh. 9 - Prob. 9.3.1PCh. 9 - Prob. 9.3.2P
Ch. 9 - Prob. 9.4.1PCh. 9 - Prob. 9.4.2PCh. 9 - Prob. 9.4.3PCh. 9 - Prob. 9.4.4PCh. 9 - Prob. 9.4.5PCh. 9 - Prob. 9.5.1PCh. 9 - Prob. 9.5.2PCh. 9 - Prob. 9.5.3PCh. 9 - Note For Problems 9.6-1 through 9.6-5, use the...Ch. 9 - Note For Problems 9.6-1 through 9.6-5, use the...Ch. 9 - Note For Problems 9.6-1 through 9.6-5, use the...Ch. 9 - Note For Problems 9.6-1 through 9.6-5, use the...Ch. 9 - Note For Problems 9.6-1 through 9.6-5, use the...Ch. 9 - Prob. 9.7.1PCh. 9 - Prob. 9.7.2PCh. 9 - Prob. 9.7.3PCh. 9 - Prob. 9.7.4PCh. 9 - Prob. 9.8.1PCh. 9 - Prob. 9.8.2PCh. 9 - A beam must be designed to the following...Ch. 9 - Prob. 9.8.4PCh. 9 - Prob. 9.8.5PCh. 9 - Prob. 9.8.6PCh. 9 - Prob. 9.8.7PCh. 9 - Prob. 9.8.8PCh. 9 - Use the composite beam tables and select a W-shape...Ch. 9 - Prob. 9.8.10PCh. 9 - Prob. 9.10.1PCh. 9 - Prob. 9.10.2P
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- 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.arrow_forwardNote 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.arrow_forwardIntroduction Concrete encased steel composite beamarrow_forward
- a t-beam has the following properties; bf = 820mm, bw = 250mm, d = 470mm and tf = 100mm. Concrete compressive strength is 20.70 MPa and the steel yield strength is 414 MPa. Determine the number of bars need if MDL = 150 kN-m and MLL = 120 kN-m. Use 25 mm bar. What is the steel area needed?arrow_forwardA composite floor system uses formed steel deck of the type shown in Figure . The beams are W18 x 50, and the slab has a total thickness of 41⁄2 inches from top of slab to bottom of deck. The effective slab width is 90 inches, and the span length is 30 feet. The structural steel is A992, and the concrete strength is f,c= 4 ksi. Compute the nominal flexural strength with two 3⁄4-inch 3 31⁄2-inch studs per rib.arrow_forwardUse single span beam. Show solutionarrow_forward
- Determine the x-bar centroid of the composite figure shown. Where x1=75; x2=102 and y=81arrow_forwardPlease show complete solution with FBD. Determine the centroid of the composite section, made up of a 450mmx 300mm triangle, a 250 mm x 300 mmrectangle, a semi-circle of 200 mm radius, with a 200 mm quadrant of a circle and a 75mm radius of full circleinscribed on the center of the rectangle.arrow_forwardA fully composite section that is comprised of an A992 W16x31 with a 5-inch, (f'c= 4 ksi) slab on top of it. The beam span is 30' and the spacing of the beams is 5-foot. All the shear studs to make the composite beam were completely forgotten to be installed by the contractor. Assume that the friction between the slab and the steel beam is enough to provide continuous lateral support to the compression flange of the steel beam but provides no composite action between the concrete and the steel. What is the LRFD moment capacity (4bMn) of this badly built attempt at a 'composite' beam, Hint; The flexural strength of the unreinforced concrete slab is 7.5*(f'c)^0.5 Also, the fundamental flexural equation is MC/I. Show all work.arrow_forward
- A rectangular beam has b = 350 mm and d = 460 mm.the concrete compression strength is 30 MPa and the steelyield strength fy = 415 MPa. Calculate the required steelreinforcement area if the steel cover is 70 mm.use NSCP 2010 Md = 230 KN-mML = 160 KN-marrow_forward3decimal places pleaseProblem 1: Determine the Moment of inertia of the composite section about the x-axis if the x-axis were lowered one inch (1") below the present location.arrow_forwardGiven: A fully composite slab is connected to a W24x68 made with the manufacturer preferred material. Concrete is specified to be 3.5 ksi concreteand the slab is 4 inches thick. The effective width of this portion of the slab is 84 inches. Find: The nominal and design strength of the section for the fully plastic condition.arrow_forward
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ISBN:9781337094740
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Publisher:Cengage Learning