Why when we calculate the Dx we multiply: (15 kN x 6 m x 6/2) i don't understand where does it comes from the 6/2

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
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Why when we calculate the Dx we multiply: (15 kN x 6 m x 6/2) 

i don't understand where does it comes from the 6/2 

Question
Please provide complete solution for the following problem for verification purposes, Thanks in advance
Draw the shear, moment and axial load diagrams for each of the three members of the frame. Assume
the frame is pin connected at A, C, and D and there is a fixed joint at B.
Diagram:
25 kN
20 kN
1.5 m-
-2 m
1.5 m-
15 kN/m
4 m
6 m
E Expand
Transcribed Image Text:Question Please provide complete solution for the following problem for verification purposes, Thanks in advance Draw the shear, moment and axial load diagrams for each of the three members of the frame. Assume the frame is pin connected at A, C, and D and there is a fixed joint at B. Diagram: 25 kN 20 kN 1.5 m- -2 m 1.5 m- 15 kN/m 4 m 6 m E Expand
Taking member CD only
Bending moment at point C = 0
Dx x 6 – (15 x 6 x ;) = 0
Dx x 6 – 270 = 0
Dx =
270
6
Dx = 45 kN
Transcribed Image Text:Taking member CD only Bending moment at point C = 0 Dx x 6 – (15 x 6 x ;) = 0 Dx x 6 – 270 = 0 Dx = 270 6 Dx = 45 kN
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