A simply supported beam made of W21x62 with a span of 8 m is subjected to counterclockwise moment at the left support and a counterclockwise moment at the right support. The moment at the right support is 1.5 times that at the left support, both bending about the strong axis. Assuming A36 steel, determine the following:

A simply supported beam made of W21x62 with a span of 8 m is subjected to counterclockwise moment at the left support and a counterclockwise moment at the right support. The moment at the right support is 1.5 times that at the left support, both bending about the strong axis. Assuming A36 steel, determine the following:

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

Combined Loading

Any functioning component, such as machine parts, structural members, pressure vessels, and so on, are all under the influence of more than one force. When anybody is under the influence of more than one force such as shear forces, bending moments, axial forces, torsion, and so on, then such body is said to be under combined loading. A very practical example of combined loading is the crankshaft of an internal combustion engine (IC engine). The crankshaft of the IC engine is under high rpm, which is caused due to the torsional forces. Due to the presence of piston, counterbalances, and internal imbalances, the crankshaft experiences lateral forces and due to the rise in temperature, the crankshaft undergoes thermal expansion, which pulls the crankshaft along the axial direction and lateral direction. The presence of unbalanced loads along the periphery of the crankshaft also induces a bending moment.

Question

A simply supported beam made of W21x62 with a span of 8 m is subjected to counterclockwise
moment at the left support and a counterclockwise moment at the right support. The moment at the
right support is 1.5 times that at the left support, both bending about the strong axis. Assuming A36
steel, determine the following:
a. Maximum ultimate moment at the left support.
Properties of W21×62:
Sx = 2,081 × 10³ mm³
Sy = 228 × 103 mm³
bf = 209.30 mm
= 53.34
%3D
%3D
bf
6.70
2tf
d
= 0.16
Af
d
59.03
-=
tw

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