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 9.7.4P
To determine
The adequate strength of the composite section by LFRD method.
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A rectangular beam 250 mm wide, 500 mm deep is reinforced at the bottom with 4-20-mm-diameter bars and at the top
with 2-16-mm bars. Concrete cover to bar centroid at the top is 80 mm and at the bottom is 70 mm. Use concrete
strength f'c = 21 Pa and steel yield strength fy = 415 MPa for 20-mm bars and fy = 275 MPa for 16-mm bars
Determine the limiting tensile steel ratio for a tension controlled condition in positive or negative bending with the given material strengths.
4. An interior reinforced concrete slab has to be designed to support a live load and a
dead load in addition to its own weight based on the following specifications:
The slab is one-way and simply supported with a span of 12 ft.
The live load on the slab is 200 psf.
The dead load on the slab is 100 psf.
Your design will use concrete compressive strength fe= 3000 psi and steel
yield strength of fy = 40,000 psi
The 5-story building design project will
have its beams and slab poured
monolithically and formed a T- section as
shown. Determine the design strength
pMn in accordance with the ACI/NSCP
Code. The tension steel is 9- 36 mm
diameter bars (As of 36 mm = 1006 mm2)
with three bars in each of three layers.
Assume 12 mm stirrups are used, and
there is 25 mm between layers. Use fc':
28 MPa and fy = 413.70 MPa.
750 mm
T175 mm
1000 mm
9-36 mm diameter bars
350 mm
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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- Situation: A beam has a width of 300 mm and total depth of 600 mm strength f'c-36 MPa. Steel yield strength fy=415 MPa The section is to be reinforced for tension only and the effective concrete cover is 65 mm. Which of the following most nearly gives the value of our balanced steel ratio? a. 0.00370 b. 0.03456 C. 0.02860 d. 0.03522 Which of the following most nearly gives the value of our balanced distance of the cuter most fiber of compression fiber to our neutral axis? a. 313.256 mm b. 354.68 mm C. 333.333 mm d. 322.435 mm Which of the following most nearly gives the value of our balanced depth of compression block? a. 248.412 mm b. 266.2676 mm C. 301.478 mm d. 281.261 mmarrow_forwardGiven Beam Data: Slab Thickness, t=175 mm Effective Depth, d= 300 mm Width of web, bw = 250 mm Material Properties Concrete, fc-24 MPa Steel, fy = 415 Mpa The concrete slab has an equivalent width of 600 mm and casted monolithically with the beam Assume that the steel bars will be distributed in one layer only and use 2010 NSCP. a) Detemine the balanced steel ratio of the section in positive bending b) Determine the maximum steel ratio for the beam in positive bending for failure in tension. c) If the slab has a thickness of 100 mm and the equivalent width of the concrete flange from the slab is 1200 mm, detemine the balanced steel ratio of the section for positive bending d) Determine the steel ratio if the section is used for negative bendingarrow_forwardGiven the section and plan view of the structural elements (Foundation and Column), estimate the concrete material quantities to be used in construction. There are sixteen (16) - C3F2 in the entire structure. Consider only from the foundation base up to the Natural Ground Level (NGL). The concrete is to have a minimum compressive strength of 3500 psi (24 Mpa).arrow_forward
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