A B C - 3 m -- 3 m 6 m (a) B -2 (b) Influence Line for Sc (kN/kN) (e) Influence Line for Mc (kN-m/kN) 90 kN 90 kN 20 kN/m Just to the right of C 40 kN/m 40 kN/m 40 kN/m IT 60 kN/m 20 KN/m 60 kN/m DA A B C A (c) Loading Arrangement for Maximum Positive Sc (f) Loading Arrangement for Maximum Positive Mc 90 kN Just to the left of C 90 kN 40 kN/mf 20 kN/m -||| 40 kN/n 20 kN/m 20 kN/m 60 kN/m – B C B C A De A D (d) Loading Arrangement for Maximum Negative Se (g) Loading Arrangement for Maximum Negative Mc FIG. 9.5

Residential Construction Academy: House Wiring (MindTap Course List)
5th Edition
ISBN:9781337402415
Author:Gregory W Fletcher
Publisher:Gregory W Fletcher
Chapter12: Raceway Installation
Section: Chapter Questions
Problem 14RQ
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Question

For the beam shown in Fig. 9.5(a), determine the maximum positive and negative shears and the maximum positive and negative bending moments at point C due to a concentrated live load of 90 kN, a uniformly distributed live load of 40 kN/m, and a uniformly distributed dead load of 20 kN/m.

A
B
C
- 3 m -- 3 m
6 m
(a)
B
-2
(b) Influence Line for Sc (kN/kN)
(e) Influence Line for Mc (kN-m/kN)
90 kN
90 kN
20 kN/m
Just to the right of C
40 kN/m
40 kN/m
40 kN/m
IT
60 kN/m
20 KN/m
60 kN/m
DA
A
B C
A
(c) Loading Arrangement for Maximum
Positive Sc
(f) Loading Arrangement for Maximum
Positive Mc
90 kN
Just to the left of C
90 kN
40 kN/mf
20 kN/m -|||
40 kN/n
20 kN/m
20 kN/m
60 kN/m
– B C
B C
A
De
A
D
(d) Loading Arrangement for Maximum
Negative Se
(g) Loading Arrangement for Maximum
Negative Mc
FIG. 9.5
Transcribed Image Text:A B C - 3 m -- 3 m 6 m (a) B -2 (b) Influence Line for Sc (kN/kN) (e) Influence Line for Mc (kN-m/kN) 90 kN 90 kN 20 kN/m Just to the right of C 40 kN/m 40 kN/m 40 kN/m IT 60 kN/m 20 KN/m 60 kN/m DA A B C A (c) Loading Arrangement for Maximum Positive Sc (f) Loading Arrangement for Maximum Positive Mc 90 kN Just to the left of C 90 kN 40 kN/mf 20 kN/m -||| 40 kN/n 20 kN/m 20 kN/m 60 kN/m – B C B C A De A D (d) Loading Arrangement for Maximum Negative Se (g) Loading Arrangement for Maximum Negative Mc FIG. 9.5
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