Structural Engineering Principles
CIVILEN 3310
Dr. Abdollah Shafieezadeh
Spring 2014
Course Objectives
Introducing classical methods of structural analysis to
provide necessary technical tools and knowledge for
analyzing structures and structural element
Determine the force in each member of the complex truss shown in
Fig. 3-33a. Assume joints B. F, and D are on the same horizontal line.
State whether the members are in tension or compression.
(a)
Fig. 3-33
SOLUTION
Reduction to Stable Simple Truss. By
Structural Engineering Principles
CIVILEN 3310
Dr. Abdollah Shafieezadeh
Spring 2014
1
Chapter 4: Internal Loadings Developed in
Structural Members
In order to design a structural member, we need to
determine its internal forces and moments.
To determin
Structural Engineering Principles
CIVILEN 3310
Dr. Abdollah Shafieezadeh
Spring 2014
1
2
Cables
Cables have great strength to weight ratio. Therefore they
are used in
Long-span bridges
Roofs over large arenas.
For construction with cable, designer mus
Structural Engineering Principles
CIVILEN 3310
Dr. Abdollah Shafieezadeh
Spring 2014
1
Analysis of Cables
Suppose the cable is supporting only
vertical loads.
The product of the cable sag, h, and
the horizontal component H of the
cable tension at any poin
Structural Engineering Principles
CIVILEN 3310
Dr. Abdollah Shafieezadeh
Spring 2014
Arcs
Arcs
Similar to cables, arcs can be used to reduce the bending
moment in long-span structures
Reduce required material and provide cost-effective solutions
Struct
Structural Engineering Principles
CIVILEN 3310
Dr. Abdollah Shafieezadeh
Spring 2014
1
Influence Lines: Loads
Many of the loads on structures, whether distributed or
concentrated, are not fixed,
i.e. their magnitude and point of action changes with time
Structural Engineering Principles
CIVILEN 3310
Dr. Abdollah Shafieezadeh
Spring 2014
1
Influence Lines: Series of Concentrated Loads
2
Influence Lines: Series of Concentrated Loads
3
Influence Lines: Series of Concentrated Loads
4
Influence Lines: Series
Structural Engineering Principles
CIVILEN 3310
Dr. Abdollah Shafieezadeh
Spring 2014
1
Deflections
What causes deflections in structures?
Structures deflect when they are subjected to
Loads
2
Deflections
What causes deflections in structures?
Structure
CIVILEN3310 Structural Engineering Principles Ohio State University
Dr. Abdollah Shaeezadeh - Spring, 2014
Quiz 3 Name: MailBox:
For the following cable, find I such that sags at I _ . _ . _ _ _:_
B and C am 3 m and 2 m, respectively. Also nd . _ .e
the m
!
i
i
E
g
i
l
E
3
i
g
i
E
E
E
E
!
i
2
g
g
E
E
z
I
i
i
i
i
ELEM/1:3 =0 SLIM Liam) + UZKN) (2.771) mom, m) 7:0 943:? lad
Tmfe mama-swam: 68:1RN"X?HN="-mm
8&6? HXN 4/
72+ 0 9* W/m .
5" , m 91: EzUCN/MNNTmV 0:1ng
_- Q $92150 sue-=20
T MC "\U 0 VQ*01\CMS
Structural Engineering Principles
CIVILEN 3310
Dr. Abdollah Shafieezadeh
Spring 2014
Analysis of Statically Determinate Structures
We will focus on the most common form of structure that
an engineer will have to analyze:
Structure lies in a plane
The s
Structural Engineering Principles
CIVILEN 3310
Dr. Abdollah Shafieezadeh
Spring 2014
1
Analysis of Statically Determinate Trusses
A truss is a structure composed of slender members joined
together at their end points
2
Analysis of Statically Determinate