statics module 2 - lecture 2 · chain, or rope weight of cable negligible weight of cable not...
TRANSCRIPT
EF 102
Module 2, Lecture 2 1
Statics Module 2 - Lecture 2
• Supports• Pulleys
– Tension in Rope– Support Forces
• Distributed Loads– Uniform– Linear
• Reactions– Cantilever Structure– Roof Truss
Supports - 2 D
Page 196-197 in text.
Review your EF 101 notes.
Common types:
— Pin
— Roller
— Fixed
EF 102
Module 2, Lecture 2 2
Supports - 2 D
Supports - 2 D
EF 102
Module 2, Lecture 2 3
Supports - 2 D
Supports - 2 D
EF 102
Module 2, Lecture 2 4
Pulleys
1000 lb
T
30 deg
A
B
C
Pulleys
1000 lb
T
30 deg
A
B
C
EF 102
Module 2, Lecture 2 5
Distributed Loads
3 lb/ftLinear
Uniform3 lb/ft
=
12 ft
12 ft
=
Example: Cantilever Beam
30 deg
1.4 kN
2.4 m
1.2 m
4 kN-m
3 kN/m
Resultant of distributed load:
Location of resultant:
EF 102
Module 2, Lecture 2 6
Example: Cantilever Beam
30 deg
1.4 kN
2.4 m
1.2 m
4 kN-m
3.6 kN1.6 m
Example: Roof Truss20000lb
36000lb 36000lb3 @ 30 ft = 90 ft 2 @ 30 ft = 60 ft
30 ft