CENG-CS-01
Approved: March 2012
COLLEGE OF ENGINEERING
Department of Civil and Architectural Engineering
CVEN 213 - STATICS
Fall 2013
Instructor Information
Name: Dr. Onur Avci, Ph.D., P.E.
Academic title: Assistant Professor
Office: J102
Phone: (+974) 44
5.4 TWO AND THREE FORCE MEMBERS
Two Force Members
Members subjected to forces only (no moments) at two
points.
FA
FB
1
For the member to be in equilibrium, FA and
FB must be of the same magnitude and
opposite direction ( F = 0). For M = 0 to
be satisfied,
(Moment of a Force on a Rigid Body)
4.8 FURTHER SIMPLIFICATION OF
A FORCE AND COUPLE SYSTEM
If a force is to be moved from one point
to another, then the external effects of
the force should remain the same. The
external effects are the translation and
ro
CHAPTER2 FORCEVECTORS
CONTENTS
2.1 ScalarsandVectors
2.2 VectorOperations
2.3 VectorAdditionofForces
2.4 AdditionofaSystemofCoplanarForces
2.5 CartesianVectors
54
2.4 AdditionofaSystemofCoplanarForces
If we have more than two forces, the resultant
can be
CHAPTER2 FORCEVECTORS
CONTENTS
2.1 ScalarsandVectors
2.2 VectorOperations
2.3 VectorAdditionofForces
2.4 AdditionofaSystemofCoplanarForces
2.5 CartesianVectors
54
2.4 AdditionofaSystemofCoplanarForces
If we have more than two forces, the resultant
can be
Qatar University
Civil and Architectural Engineering
Dr. Onur Avci & Eng. Husam Sadek
TUTORIAL 1
CVEN 213 Statics
Fall 2014
Qatar University
Civil and Architectural Engineering
Dr. Onur Avci & Eng. Husam Sadek
TUTORIAL 1
CVEN 213 Statics
Fall 2014
Qatar U
174
CHAPTER 4
F O R C E S Y S T E M R E S U LTA N T S
EXAMPLE 4.17
Replace the force and couple moment system acting on the beam in
Fig. 444a by an equivalent resultant force, and find where its line of
action intersects the beam, measured from point O.
8
CVEN 213 Statics
51
52
CHAPTER2 FORCEVECTORS
CONTENTS
2.1 ScalarsandVectors
2.2 VectorOperations
2.3 VectorAdditionofForces
2.4 AdditionofaSystemofCoplanarForces
2.5 CartesianVectors
53
2.4 AdditionofaSystemofCoplanarForces
If we have more than two forces
CHAPTER 8 FRICTION
Only 8.1 and 8.2 will be covered in this class.
We used to assume that surface of contact
between two bodies are smooth
Reaction is assumed be normal to surface of
contact
F
In reality, surfaces are rough
Ff
Fn
1
8.1 Characteristics
CHAPTER 7
INTERNAL FORCES
SECTION 7.1
EXAMPLE PROBLEMS
7-8 (Continued)
7-10 (Continued)
7.13 (Continued)
7.18 (Continued)
7.2 Shear and Moment Equations
and Diagrams
To design a beam, you should know the variation
of the internal shear force ( V ) and be
(Moment of a Force on a Rigid Body)
4.8 FURTHER SIMPLIFICATION OF
A FORCE AND COUPLE SYSTEM
If a force is to be moved from one point
to another, then the external effects of
the force should remain the same. The
external effects are the translation and
ro
5.4 TWO AND THREE FORCE MEMBERS
Two Force Members
Members subjected to forces only (no moments) at two
points.
FA
FB
1
For the member to be in equilibrium, FA and
FB must be of the same magnitude and
opposite direction ( F = 0). For M = 0 to
be satisfied,
CHAPTER 5
EQUILIBRIUM OF A
RIGID BODY
The body shown is
subjected to forces F1,
F2, F3 and F4. For the
body to be in
equilibrium, the
summation of all forces
acting on the body
must be equal to zero.
1
All kinds of structures are in equilibrium.
2
All kin
CHAPTER 6:
STRUCTURAL ANALYSIS
The main objective of Chapter 6 is to use the
equilibrium equations to analyze structures
which are composed of pin-connected
members.
1
6.1 Simple Trusses
2
This is a simple structure composed of
three pin-connected member
5.3 EQUATIONS OF EQUILIBRIUM
The body is subjected to a
system of forces which lies
in the x-y plane.
From equilibrium
equations:
Fx =0
Fy =0
M =0
Alternatively,
Fa =0
MA =0
MB =0
a
F1
F2
C
A
B
F3
F4
a
1
2
USE THE SET OF EQUATIONS THAT IS THE MOST
C
6.5 Space Trusses will not be covered in this course.
6.6 FRAMES AND MACHINES
Frames and machines are structures composed
of pin-connected members. Those members
are subjected to more than two forces.
The forces acting at the joints and supports can
be
Will be solved in tutorial hour
1
2
3
4
6.3 Zero-Force Members
Zero-force members are used to:
Increase stability of the truss during construction
Provide support if applied loading is changed
As a general rule:
1. Zero-force members are formed when onl