Unit 27 Assignment 1
In this assignment, I need to work out the forces of each joint in 3 different methods. Which
will include Method of Joints, Method of sections & Graphical Approach and show how to
calculate them.
,P1 – Graphic Approach
, P2 METHOD OF JOINTS
I
UNIT 27 ASS 1
EF ↑ = EF ↓ (vertical equilibrium )
EMclockwise = EManticlockwise
R1 + R2 = 7+6+8 = 21
(7x5) + (6x10) + (8x15) = 35+60+120 = 215KN
R1=20 x R2
= 10.75, R2 = 10.75
E>R2 = 20 x R1
E>R2 = (8x5) + 6x10) + (7x15) = 40 + 60 + 105 = 205KN
E>R2 = E<R2 ( clockwise is equal to anticlockwise)
20 x R1 = 205
R1 = 205/20 , R1 = 10.25KN
Joint 1
In this assignment, I need to work out the forces of each joint in 3 different methods. Which
will include Method of Joints, Method of sections & Graphical Approach and show how to
calculate them.
,P1 – Graphic Approach
, P2 METHOD OF JOINTS
I
UNIT 27 ASS 1
EF ↑ = EF ↓ (vertical equilibrium )
EMclockwise = EManticlockwise
R1 + R2 = 7+6+8 = 21
(7x5) + (6x10) + (8x15) = 35+60+120 = 215KN
R1=20 x R2
= 10.75, R2 = 10.75
E>R2 = 20 x R1
E>R2 = (8x5) + 6x10) + (7x15) = 40 + 60 + 105 = 205KN
E>R2 = E<R2 ( clockwise is equal to anticlockwise)
20 x R1 = 205
R1 = 205/20 , R1 = 10.25KN
Joint 1
