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TRUSS ANALYSIS METHODS
•
Draw a free body of a
joint.
•
Look at the equilibrium
condition of the joint.
•
Keep going until the
desired force is obtained
Method of Joints
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View Full Document TRUSS ANALYSIS METHODS
•
Draw a free body of
a
part of
truss.
•
Look at the
equilibrium of the
FBD of the truss.
METHOD OF SECTIONS
USING METHOD OF JOINTS
•
Draw freebodies of
joints B and D
,
also draw freebodies of members
of BI and DG.
30,000
10,000
lb
11,000
A
lb
B
10,000
H
lb
lb
C
I
D
6,000
G
16,000
lb
lb
E
F
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View Full Document EQUILIBRIUM OF JOINT B:
EQUILIBRIUM OF JOINT D
FREE BODIES
0
)
(
=
↑
∑
y
F
B
30,000
lb
10,000
D
lb
F
DE
DG
F
F
DC
BC
F
F
BI
AB
F
F
GD
F
DG
F
F
BI
IB
B
D
I
G
x
y
0
)
(
=
↑
∑
y
F
Members IB and GD are
assumed to be in tension.
B
30,000
lb
10,000
D
lb
F
DE
DG
F
F
DC
BC
F
F
BI
AB
F
FREE BODIES OF JOINTS B and D
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View Full Document B
30,000
lb
10,000
D
lb
F
DE
DG
F
F
DC
BC
F
F
BI
AB
F
FREE BODIES OF JOINTS B and D
From free body of joint B:
lb
F
F
F
F
BI
BI
y
y
000
,
30
000
,
30
0
)
(
=

=
=
↑
∑
∑
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This note was uploaded on 03/27/2008 for the course ENGIN 375 taught by Professor Miller during the Spring '08 term at University of Cincinnati.
 Spring '08
 Miller

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