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 9.1.3P
To determine
(a)
The moment of inertia of the transformed section.
To determine
(b)
The stress at the top of the steel (indicate whether tension or compression), the stress at the bottom of the steel, and the stress at the top of the concrete.
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A doubly reinforced concrete beam has a max. effective depth of 630mm and is subjected to a factored moment of 1062 kn-m (including its own weight). fºc=27.58 MPa, fy = 413.4 MPa. Use 62.5 mm steel covering.
1. Determine the width of the beam.
2. Determine the reinforcement for compression.
3. Determine the reinforcement for tension.
A rectangular reinforced concrete beam with a width of 260 mm and a total depth of 650 mm with concrete cover of 65 mm is subjected to a service moment of 127 kN-m. The beam is reinforced with 3- 20 mm dia bars. Use f'c = 27.7 MPa and fy = 428 MPa. Use transformed section method. Do the following: (1) Compute the distance of the neutral axis from the top of the beam, (2) Compute the maximum stress of concrete in MPa, (3) Compute the maximum stress of steel in MPa, and (4) Assess the adequacy of the beam design.
A rectangular reinforced concrete beam has b=300mm and d=480mm, concrete strength f'c=34 mpa and steel yield strength fy=415 MPa. Compression reinforcement, if necessary, will be placed 70 mm from the extreme concrete in compression. For this problem, the dead load moment is 140 kn-m and the live load moment is 180 kn-m.
a.) what is the value of the required moment in kn-m?
b.) what is the value of the maximum steel ratio when the beam is singly reinforced?
c.) what is the required tension steel area in mm^2?
if M(subscript)d= 250 kn-m and M(subscript)L= 240 kn-m
d.) determine the required tension steel area in mm^2
e.) determine the required compression steel area in mm^2
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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