POLYTECHNIC OF NAMIBIA

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POLYTECHNIC OF NAMIBIA

SCHOOL OF ENGINEERING AND INFORMATION TECHNOLOGY

DEPARTMENT: CIVIL ENGINEERING

_______________________________________________________________________________________________________________

Private Bag 13388, 13 Storch Street, Wind
hoek, NAMIBIA

Tel.: (264)(61) 207 2091


(264) 81 127 0695


Fax: (264)(61) 2072142



JULY 2003


STRUCTURAL DESIGN 3.2




(SDE 3400)


COURSE OUTLINE


Lecturer: W. Singoro

Office: G29

Consulting hours: As per schedule on lecturer’s office door



1.

GOALS AND

OBJECTIVES OF THE COURSE


Structural design 3.2 (SDE 3400) is an S4 course in the National Diploma: Civil
Engineering whose aim is to enable one to perform structural design in:
-

a)

Timber

b)

Reinforced concrete and

c)

Unreinforced masonry


The prerequisite for
one to take this course is theory of Structural Design 3.1 (SDE
3300). Additionally, adequate understanding of Structural Analysis 2 and Structural
Analysis 3 is essential in ensuring proper appreciation and command of the principles
involved in this SDE 3
400 course. This is due to the fact that design of structures requires
an evaluation of the magnitudes of the different types of stresses generated within the
structure by the various loads


and this is achieved by applying techniques covered in
the Struc
tural Analysis courses.



2.

BROAD OUTLINE OF THE COURSE


The concepts to be covered under this course are:
-

a)

A brief review of assessment of loads that normally act on structures

b)

Design of structures in Timber

c)

Design of structures in reinforced concrete

d)

Design of unreinforced masonry structures

e)

Computer applications in structural design.



2

3.

DELIVERY MODES, EXERCISES, TUTORIALS AND PROJECT
ASSIGNMENT


Students are required to take their own class notes during lectures. These are
supplemented by handouts that

will be issued at regular intervals as the course
proceeds. There will be exercises and tutorials at the end of each chapter and every
student will be required to successfully work through these.


Towards the end of the course a project assignment will b
e given to the students in
which each student will be required to present a design in timber and/or reinforced
concrete and/or masonry.


It is crucial that every student attends all the scheduled lecture and tutorial sessions.
This is because due to the d
elivery mode adopted, a lot of the material that will be
delivered during these sessions will not be accessible in an alternative format. In the
event that one misses any of the sessions due to valid constraints, it is incumbent
upon him/her to make the ne
cessary arrangements with the lecturer, within the
shortest possible time after the missed session, to be brought up date with regard to
the material that that may have been covered during his/her absence.



4.

COURSE EVALUATION


a)

The course is a continuous ev
aluation course

b)

There will be two continuous assessment tests in the course of the semester

c)

A project assignment shall be given to students in which every student will be
required to produce a complete structural design to acceptable standards and in
acce
ptable format. In line with industry requirements and practice, the datelines
for submission of the project assignments will have to be strictly adhered to.
Contravention of the set datelines will lead to penalties in the form of lost marks.

d)

Final evaluati
on of the course will be based on the continuous assessment tests
taken and the project assignment as follows:
-



C.A.Test 1


= 30%



C.A.Test 2


= 30%



Project assignment

= 40%

Course mark


= 100%


e)

To pass the course, a student must attain a course mark of

at least 50%

f)

Only valid excuses are acceptable for not attending a test. In the event that ill
health is the alleged constraint, the lecturer shall reserve the right to ask for a
medical certificate and to contact the medical practitioner in question to v
erify the
situation.

g)

The regulations for supplementary tests/re
-
evaluations, as per Civil Engineering
departmental policy, are attached hereto.




3

5.

WORK PROGRAM AND SYLLABUS


Week no.


Topic & Content


Week 1:

Introduction


A brief review of assessment of l
oads acting on
structures.





Timber element design



Source of structural timber; variability
in quality of structural timber; need for grading of structural
timber; procedures for grading of timber.



Week 2:

Timber element design



Orientation of grain

in timber structural
members and its influence on the member’s strength capacities;
The various strength modification factors for timber in structural
design; Section properties (A, I and Z) of timber elements and their
effects on members’ strength capaci
ties.






Week 3:

Timber element design



Limit states: load factors and resistance
factors in timber design; Timber design code (SABS 0163


1:
1994); Design of timber elements in axial tension.


Week 4:

Timber element design



Design of timber
elements in axial
compression, in bending and in shear. Design of timber elements in
for deflection; Design of timber connections; Design of timber
elements for fire


all as per SABS 0164
-
1: 1994.



Week 5:


Design of reinforced concrete structures



Gener
al introduction to reinforced concrete design


attributes of concrete in compression and in tension vis
-
à
-
vis the need for use of steel reinforcement



Limit states design philosophy as applied to the
determination of standard beam design formula; derivatio
n
of the various beam design formulae using stress
distribution diagrams.



Reinforced concrete design codes and the particular design
codes in common usage in the local market


SABS 0100
-
1: 1992 and BS 8110. (The reinforced concrete design code
requirement
s for each aspect of design to be dealt with at
each stage of the curriculum as relevant)






4

Week 6:


Design of reinforced concrete structures



Design of rectangular beams, T
-
beams and L
-
beams in
accordance with the provisions of SABS 0100
-
1: 1992 for both

single and for double (compression) reinforcement.



Use of Prokon software for the design of the beams of the
beams according to SABS 0100
-
1: 1992.


Week 7:


C.A. TEST 1

Design of reinforced concrete structures



Design of reinforced concrete slabs


One wa
y and two way
spanning slabs, single panel slabs, continuous slabs +
continuous beams; redistribution of moments; reinforcement
detailing for slabs and beams.



Use of Prokon software for the design of reinforced concrete
slabs having the various support con
ditions according to SABS
0100
-
1: 1992.


Week 8:


Design of reinforced concrete structures



A brief consideration of light
-
weight reinforced concrete slabs


coffer slabs and ribbed slabs.



Design of reinforced concrete columns


an introductory look
at sh
ort and lender columns; braced and unbraced columns;
axial and eccentric loading of columns and detailed procedure
for design of short, braced axially loaded reinforced concrete
columns as per SABS 0100
-
1: 1992 requirements.



Reinforcement detailing require
ments for reinforced concrete
columns.



Use of Prokon software for design of reinforced concrete
columns.


Week 9:


Design of reinforced concrete structures



Design of reinforced concrete foundations


consideration of
different types of footings


pad, stri
p, raft and piled
foundations; detailed procedure for design of pad footings and
strip footings.



Detailing requirements for reinforced concrete footings.



Reinforcement design for reinforced concrete retaining walls
and detailing requirements for them.



Use
of Prokon software in the design of reinforced concrete
foundations and retaining walls.









5

Week 10:

ISSUE OF PROJECT ASSIGNMENT BRIEF AND
START OF PROJECT WORK

Design of reinforced concrete structures



Detailing of reinforced concrete connections as pe
r SABS 0144
requirements.


Design of unreinforced masonry structures



An introduction to the structural use of masonry


Week 11:


Design of unreinforced masonry structures



Procedures for design of unreinforced masonry structures in
accordance with SABS
1064 and SABS 0400 part K.



Design of unreinforced masonry structures in accordance with
empirical rules according to the Masonry manual (Ed: J.W.
Lane)



Week 12:


C.A. TEST 2

Design of unreinforced masonry structures



Procedures for design of unreinforc
ed masonry structures in
accordance with empirical rules according to the Masonry
manual (Ed: J.W. Lane)



Week 13:


Pre
-
stressed concrete design



A brief introduction to the principles of and philosophy of pre
-
stressed concrete design



Week 14:


Revi
sion/project work



Week 15:


Revision/project work


Week 16:

Revision/project work;

HANDING IN OF PROJECT
WORK



Week 17:


Revision




6.

RECOMMENDED TEXT BOOKS


i)


Reinforced Concrete


Design Theory and Examples

By: T.J. Macginley and B.S. Choo


ii) Re
inforced Concrete Design



By: W.H. Mosley and J.H. Bungey


iii) Reinforced and Prestressed concrete


6


By: F.K. Evans and R.H. Kong



iv) Structural Design in Wood



By: Judith Stalnaker and Ernest C. Harris


The following codes of practice/manuals will b
e issued to the students:

a)

SABS 0100
-
1: 1992: The structural use of concrete part 1: Design

b)

SABS 0164
-
1: 1980: The structural use of masonry part 1: unreinforced
masonry walling

c)

SABS 0163
-
1: 1994: The Structural Use of Timber: Part 1: Limit States
Design.

d)

Masonry Manual (Ed: J.W. Lane) + Part K of SABS 0400 + extracts from
assorted publications on timber design.


In addition, a copy of
SABS 0160: General procedures and loadings to adopted in
design of buildings
, which was issued to the students last semest
er, is one of the referral
documents that must be continuously available to each student during this course.