THUMBS UP WILL BE GIVEN. WRITE THE COMPLETE SOLUTIONS LEGIBLY. ANSWER ALL THE QUESTIONS. ANSWER IN 2 DECIMAL PLACES. BOX THE FINAL ANSWERS.

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
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THUMBS UP WILL BE GIVEN. WRITE THE COMPLETE SOLUTIONS LEGIBLY. ANSWER ALL THE QUESTIONS. ANSWER IN 2 DECIMAL PLACES. BOX THE FINAL ANSWERS.
A composite beam is fabricated by bolting two 2.3-in-wide by 14-in.-deep timber planks to the sides of a 0.4-in. by 14-in. steel plate.
The moduli of elasticity of the timber and the steel are 1870 ksi and 29300 ksi, respectively. The simply supported beam spans a
distance of 13 ft and carries two concentrated loads P, which are applied as shown. Assume LAB=LCD= 3 ft, LBc = 7 ft, b = 2.3 in., d = 14
in. and t = 0.4 in.
(a) Determine the maximum bending stresses o, o, produced in the timber planks and the steel plate if P = 3.2 kips.
(b) Assume that the allowable bending stresses of the timber and the steel are 930 psi and 19500 psi, respectively. Determine the
largest acceptable magnitude for concentrated loads P. (You may neglect the weight of the beam in your calculations.)
Answers:
(a) o, =
(b) P= i
LAB
P
B
LBC
4F
balk b
Cross section
P
kips.
с
ksi, o, =
LCD
i
ksi.
Transcribed Image Text:A composite beam is fabricated by bolting two 2.3-in-wide by 14-in.-deep timber planks to the sides of a 0.4-in. by 14-in. steel plate. The moduli of elasticity of the timber and the steel are 1870 ksi and 29300 ksi, respectively. The simply supported beam spans a distance of 13 ft and carries two concentrated loads P, which are applied as shown. Assume LAB=LCD= 3 ft, LBc = 7 ft, b = 2.3 in., d = 14 in. and t = 0.4 in. (a) Determine the maximum bending stresses o, o, produced in the timber planks and the steel plate if P = 3.2 kips. (b) Assume that the allowable bending stresses of the timber and the steel are 930 psi and 19500 psi, respectively. Determine the largest acceptable magnitude for concentrated loads P. (You may neglect the weight of the beam in your calculations.) Answers: (a) o, = (b) P= i LAB P B LBC 4F balk b Cross section P kips. с ksi, o, = LCD i ksi.
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