Abu Dhabi University
College of Engineering and Computer Science
FALL 2014/2015
Structural Steel Design
CIV413
Group #12
Term Project
Submitted by: ID:
Hakam Amer Ayyad 1028763
Alhareth Hamid 1029638
Saleh Khalaf 1025786
Instructor: Dr. Zubair Sayed
1
Table of contents:
Title Page Number
Cover Page 1
Table of Contents 2
Introduction 3
Why we did our project 4
Step by step analysis of the project 4-12
Running the analysis 13-18
Deflected shape of the building 19
Axial, Shear and Moment diagrams for
Load combinations
20-26
Manual Calculations
27-32
Conclusion 33
References 34
2
Introduction:
We as civil engineers know that steel plays a big part of our professional lives.
Steel is used in almost every building around the world. Why is that? Steel is popular
and it is one of the most important materials used in constructing that is because steel
has a very high tensile strength and is much cheaper than other materials with similar
properties. Steel is a mixture of carbon and iron.
Steels containing 0.2% C to 1.5% C are known as carbon steel. They are of three types. It contains 14% to 18% chromium and 7% to 9% nickel.The three types of carbon steel are :
1. Low carbon steel2. Mild carbon steel3. High carbon steel
The other types of steel are alloy steel and stainless steel.
Why use steel?
Steel is not only one of the strongest materials in the world today, it is
the best automotive material in terms of its design flexibility, cost
effectiveness, low emissions during manufacture, recyclability, and the list
could go on. The typical strength of steel is 50 ksi which is a lot higher than
other materials and it is much lighter as well.
Structural steel is steel construction material, a profile, formed with a
specific shape or cross section and certain standards of chemical composition and
mechanical properties. Structural steel shape, size, composition, strength,
storage, etc., is regulated in most industrialized countries.
3
What We did in our project:
We were assigned by our Instructor to design a 12 story building with
certain load combinations and we were asked to design and analyze this
building.
We used ETABS to do our software analysis, at first we chose the steel
type and number of stories after that we continued and designed the slabs
and walls.
Bracing frames must be used in the perpendicular direction and frames
that resist moment must be used in one direction for lateral force resisting
system.
This report contains screenshots of the work we have done in the
software and also contains the manual calculations of 3 beams and 3 columns
that are required to check and make sure that the values we got from ETABS
are correct.
Design loads:
Superimposed dead load: 2.5 kN/m2
Live load: 3.5 kN/m2
Cladding: choose suitable value.
Wind: Building located in Musaffah with 100 mph design wind speed.
4
A step by step process to show how we designed our model:
Inserting the model data
The code of the design steel we used: AISC360-10
The structural objects we assigned were Grid only and the next screenshot shows the
dimensions we entered and used in our design of the model.
5
We drew the beams and columns.
We have assigned fixed joints to the building
6
Drawing slabs and walls
Slabs:
7
The next screenshot shows the walls of the building:
8
Step6: We have added bracing to all the sides of the building:
9
We have assigned loads such as dead, live, super dead and wind loads as well as
cladding:
We added wind load as the following screenshot:
10
We applied the loads:
Deck property:
11
Applying the loads:
12
Cladding that we applied:
The wind load was assigned to one side of the building.
13
Running the analysis of the software
14
15
16
17
18
The Deflected shape is shown in the screenshot above.
19
Next Screenshots show the axial,shear and moment diagram for each load combination
Dead Load
Axial
Shear 33
20
Moment 3-3
Live Load
Axial
21
shear
Moment
22
Super Dead
Axial
Shear 33
23
Moment 33
Wind
Axial
Shear 33
24
Moment 33
25
Cladding
Axial
Shear 33
Moment 33
26
27
28
29
30
31
32
Conclusion:
Engineers are humans and they can make mistakes, ETABS and
engineering softwares in general are a big asset to engineers because they
are very accurate and don’t do mistakes. Also, Engineering soft wares can
save engineers a lot of time by adding, analyzing and designing buildings
and other models.
We didn’t have a lot of problems in our projects but we did we asked the
teacher assistants for some help to guide us through things that were a
little confusing. In the end we have learnt a lot while doing this project
and that helped us get more experience in using ETABS that we are
pretty sure will be that we will be using a lot in the near future.
33
ReferencesAISC. (1921). Specifications of steel. American institute of steel construction.
http://www.citycollegiate.com/IX_steeltypes.htm
http://en.wikipedia.org/wiki/Structural_steel
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