Reinforced concrete Design Syllabus

8/9/2019 Reinforced concrete Design Syllabus

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CONTENTS

Page

1

INTRODUCTION .......................................................................................................................... 3

2 PURPOSE OF AND OUTCOMES FOR THE MODULE............................................................... 3

2.1

Purpose ........................................................................................................................................ 3

2.2

Outcomes ..................................................................................................................................... 3

3

LECTURER(S) AND CONTACT DETAILS ................................................................................... 3

3.1 Lecturer(s) .................................................................................................................................... 3

3.2

Department ................................................................................................................................... 3

3.3 University ...................................................................................................................................... 4

4 MODULE-RELATED RESOURCES ............................................................................................. 4

4.1 Prescribed books .......................................................................................................................... 4

4.2 Recommended books ................................................................................................................... 4

4.3

Electronic Reserves (e-Reserves) ................................................................................................. 4

5 STUDENT SUPPORT SERVICES FOR THE MODULE ............................................................... 5

6 MODULE-SPECIFIC STUDY PLAN ............................................................................................. 5

7 MODULE PRACTICAL WORK AND WORK-INTEGRATED LEARNING .................................... 5

8 ASSESSMENT ............................................................................................................................. 5

8.1 Assessment plan .......................................................................................................................... 5

8.2 General assignment numbers ....................................................................................................... 5

8.2.1

Unique assignment numbers ........................................................................................................ 5

8.2.2

Due dates for assignments ........................................................................................................... 5

8.3 Submission of assignments .......................................................................................................... 5

8.4

Assignments ................................................................................................................................. 8

9 OTHER ASSESSMENT METHODS ........................................................................................... 14

10

EXAMINATION ........................................................................................................................... 14

11

FREQUENTLY ASKED QUESTIONS ........................................................................................ 14

12

SOURCES CONSULTED ........................................................................................................... 14

13 CONCLUSION ............................................................................................................................ 14

14 ADDENDUM ............................................................................................................................... 14


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1 INTRODUCTION

Dear Student

Some of this tutorial matter may not be available when you register. Tutorial matter that is not availablewhen you register will be posted to you as soon as possible, but is also available on myUnisa.

2 PURPOSE OF AND OUTCOMES FOR THE MODULE

2.1 Purpose

The Module Reinforced Concrete and Masonry Design III is structured to equip the students with

structural engineering design skills to arrive at a cost effective solutions based on the recommendation of

SANS10100, rational thinking and first principles. This is achieved through a combination of

techniques including lectures, notes and practical design examples. Leaners are encouraged to

visit construction sites.

2.2 Outcomes

Design of reinforced concrete structures and detailing.

3 LECTURER(S) AND CONTACT DETAILS

3.1 Lecturer(s)

Your Tutor is: Dr Wekesa BW (Bsc, Msc, D-Tech)

Email: [email protected]

Tel: 0844 904 220

Contact time: Friday after 10.00 a.m

3.2 Department

Department Address:

Department of Civil and Chemical Engineering

Unisa (Florida Campus)

Private Bag x6

Florida

1710

Phone: 011 471 2048/3132


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Use the general E-mail address:civil&[email protected]

3.3 University website

www.unisa.co.za

www.unisa.ac.za

4 MODULE-RELATED RESOURCES

4.1 Prescribed books

Reinforced concrete Design to SANS 10100, PARROTT G, SAICE .ISBN:9781919858142

SANS 10100-1 (SABS 0100), The Structural use of concrete Part 1: Design, SABS .ISBN:

0626056071

SANS 10160-1, Basis of structural and actions for buildings and industrial structures Part 1: Basis of

structural design, SABS. ISBN: 978-0-626-26428-4

SANS 10160-2, Basis of structural and actions for buildings and industrial structures Part 2: Self-

weight and imposed loads, SABS. ISBN: 978-0-626-24759-1

SANS 10160-3, Basis of structural and actions for buildings and industrial structures Part 3: Wind

actions, SABS. ISBN: 978-0-626-26430-7

4.2 Recommended books

ANALYSIS AND DESIGN OF CONCRETE STRUCTURES, ROBBERTS, J.M AND

MARSHALL, V. CEMENT AMD CONCRETE INSTITUTE, MIDRAND, 2006

And any other suitable reinforced concrete design book is RECOMMENDED as a

supplementary reading to the course material.

Pay special attention to neatness, method of calculation, layout of calculations and check

calculations.

4.3 Electronic Reserves (e-Reserves)

All course materials are available on myUnisahttp://my.unisa.ac.zaunder the module course

code under Materials. Leaners are encouraged to set up discussion forums for interaction with

their peers http://my.unisa.ac.za.Some additional electronic resources are available from the

library site (viawww.unisa.ac.za). You may electronically post or upload your assignments in

line with the guidelines explained in the booklet.
mailto:civil&[email protected]:civil&[email protected]:civil&[email protected]://my.unisa.ac.za/http://my.unisa.ac.za/http://my.unisa.ac.za/http://my.unisa.ac.za/http://my.unisa.ac.za/http://www.unisa.ac.za/http://www.unisa.ac.za/http://www.unisa.ac.za/http://www.unisa.ac.za/http://my.unisa.ac.za/http://my.unisa.ac.za/mailto:civil&[email protected]


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5 STUDENT SUPPORT SERVICES FOR THE MODULE

Important information appears in youre mystudies@unisabrochure.

6 MODULE-SPECIFIC STUDY PLAN

Use your my Studies@unisabrochure for general management and planning skills.

7 MODULE PRACTICAL WORK AND WORK-INTEGRATED LEARNING

There are no practical works for this module however leaners are encouraged to visit construction sites.

8 ASSESSMENT

8.1 Assessment plan

This is a year course.Use your my Studies@unisabrochure for general time management andplanning skills.

8.2 General assignment numbers

Assignments are numbered consecutively per module, starting from 01

8.2.1 Unique assignment numbers

Assignment 1 627374

Assignment 2 627389

8.2.2 Due dates for assignments

Assignment 1 8 May 2015

Assignment 2 3 July 2015

8.3 Submission of assignments

Note: The cut off dates given here are the official, last dates on which a given assignment may be

submitted. Students must adhere to these dates only. All other dates referring to cut off submission


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dates for assignment, as may be posted on myUnisa or elsewhere, refers to administrative dates as

managed by the Assignments Department and does NOT influence or change the above dates.

Website

Please note that the department has a web site where additional information on the department and

modules are available. The address is:

http://www.unisa.ac.za/Default.asp?Cmd=ViewContent&ContentID=19740

Tutorial Letters are available from the myUnisa website (See my Studies @ Unisa).

Should you encounter any problems in submitting an assignment on myUnisa, you may contact the help

line [email protected].

Plagiarism

An assignment is designed to be a product of your own study and your own thought. It is not intended to

be a piece of work which merely reproduces details, information or ideas from a study guide, from booksor articles, from the Internet.

If you do this, you commit plagiarism. Plagiarism is the act of copying word for word withor without

acknowledgmentfrom study sources (e.g. books, articles, the Internet). In other words, you must submit

your own ideas in your own words, sometimes interspersing relevant short quotations that are properly

referenced.

Yes, simply copying a few pages from the prescribed book is plagiarism. Pasting paragraphs from

Wikipedia into your assignment is plagiarism. And it does not stop being plagiarism if you mention the

source.

Skilled scientific writers can use direct block quotations to make a specific point. They know what they

are doing. You still need to develop your own voice, your own style of arguing the point. Do not

plagiarise.
http://www.unisa.ac.za/Default.asp?Cmd=ViewContent&ContentID=19740http://www.unisa.ac.za/Default.asp?Cmd=ViewContent&ContentID=19740mailto:[email protected]:[email protected]:[email protected]:[email protected]://www.unisa.ac.za/Default.asp?Cmd=ViewContent&ContentID=19740


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Note that you also commit plagiarism if you copy the assignment of another student. We do encourage

you to work together and form study groups, but you are expected to prepare and submit your own

assignments.

When we receive two or more identical assignments, we are unable to work out who copied from whom.

We will therefore penalize both students.

If you commi t plagiarism you wi ll be penalized and given no marks for your assignment. This will

have a serious effect on your chances to succeed in your studies because you wi ll have no

semester mark.

Furthermore, you may be penalised or subjected to disciplinary proceedings by the University.

Plagiarism is also an offence in terms of the law.

A Signed Declaration

Every essay type assignment we receive must include the following declaration along with your name

and the date:

We will subtract marks if this declaration is absent from assignment, just as we will subtract marks if yourassignment does not have a Table of contents, List of references cited, and so on.

I declare that this assignment is my own work and that all sourcesquoted have been acknowledged by appropr iate references.


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8.4 Assignments

ASSIGNMENT 1

Answer the following questions on the Mark reading sheet:

1. Which one of the following statements is not true?

1) Concrete is weak in tension

2) Reinforcing steel has poor durability

3) Concrete has poor fire resistance

4) Concrete has good compression strength

5) Concrete has good durability

2. Which one of the following statements is not true when reinforcing steel and concrete is

combined?

1) Concrete is usually in the compressive zone

2) Reinforcing steel is usually in the tensile zone.

3) Concrete is usually in the tensile zone

4) Reinforced concrete is designed with the assumption that concrete resist compressive

forces.

5) None of the above

3. Which one of the following statements is true regarding the bond strength between concrete and

reinforced steel?

1) Bond strength is a combination of the effects of adhesion, friction and shear.

2) Bond strength does not rely on the shear strength of concrete.

3) There is significant difference between the bond of plain and deformed reinforcing steel.

4) All of the above

4. Which one of the following statements is true?

1) If small cracks start to develop in the concrete in the tension face of the member the

structural element is danger to collapse.

2) If the concrete in compression face of the member start to crumble the structural element

is in danger to collapse


4) All of the above


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5. Which one of the following statements is false?

1) Steel reinforcement is not required in the compression zone of a structural member.

2) Steel reinforcement is required when the compressive strength of concrete is exceeded.

3) Stirrups are used to prevent the compression reinforcement from buckling.

4) Stirrups is used to withstand the shear force in a structural member6. Which one of the following statements is true?

The concrete strength is assessed by measuring the cube crushing strength at:

1) 7 days

2) 14 days

3) 21 days

4) 28 days

7. Which one of the following statements is true about characteristic strength of reinforcing steel?

1) High tension steel is 450N/mm2

2) Drawn wire is 485N/mm2

3) Characteristic strength of steel is greater than that of concrete


5) All of the above

8. Which one of the following statements is false?

1) Mild steel has smooth surface

2) High tensile steel has a ribbed surface

3) Drawn wire has a ribbed surface



1) In a simply supported beam the tensile reinforced steel is at the bottom of the structural

member

2) In a cantilever beam the tensile reinforcement is at the top of the structural member

3) All of the above



1) The concrete cover over the reinforcing steel is not important.

2) The concrete cover over the reinforcing steel must be at least 5mm

3) The concrete cover over the reinforcing steel must be at least equal to the aggregate size

used in the concrete


[10 marks]


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ASSIGNMENT 2

QUESTION 1

A reinforced concrete beam and slab system for an office block is as shown in Figure 1. Assume the

total factored design load for the slab to be 12 kN/m2. Calculate the flexural steel reinforcement for the

slab. Use characteristic strength of concrete (fcu) = 25 MPa and of steel (fy) = 450 MPa, assume severe

exposure conditions. Sketch the slab layout with reinforcements.

Figure 1: Reinforced concrete beam and slab system

20 Marks

QUESTION 2

The beam shown in Figure 2is part of a reinforced concrete frame structure. The nominal design loads

on each span are dead load (Gk) = 160 kN and imposed load (Qk) is 120 kN. Calculate the area of steel

reinforcement steel maximum sagging and hogging moments. Take characteristic strength of concrete

(fcu) = 30 N/mm2, characteristic strength of steel (fy) = 450 MPa and cover to reinforcement c = 25 mm.

Design for shear and check deflection.


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Figure 2: Beam span and section

20 Marks

QUESTION 3

A combined concrete foundation supporting two columns C1 (4500 x 250 mm) and C2 (250 x 250 mm) is

as shown in Figure 3below. The permissible bearing pressure is 150 kPa.

(i) Determine the distance X to achieve a uniform (constant) soil pressure under the foundation.

(ii) Determine the minimum thickness for the foundation consistent with no punching shearreinforcement

(iii) Design the foundation for flexure and sketch the layout with reinforcement.


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Figure 3: Combined Footing

20 Marks

QUESTION 4

It is proposed to construct a cantilever retaining wall on a spread base to support level ground and a foot

path adjacent to a road. The existing ground may be excavated as necessary to construct the wall, and

the excavated ground behind the wall is to be reinstated by backfilling with a granular material. A graded

drainage material will be provided behind the wall, with adequate drainage system at the bottom. Given:

Height of fill to be retained is 4.5 m above top of base

Surcharge due to the foot path is 20 kN/m2


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Properties of retained soil (well graded sand and gravel): unit weight of soil

= 17 kNm2and =350

Properties of sub-base soil (medium sand): allowable bearing value = 200 kN/m2and =30 0,

and coefficient of sliding = 0.4

Determine suitable dimensions for the proposed cantilever retaining wall and check the wall against

overturning, sliding and ground pressure.

Determine reinforcing steel take fcu= 25 MPa and cover to reinforcing steel of Y12 as 50 mm.

20 Marks

QUESTION 5

The height from floor to floor of a 10 storey reinforced concrete frame structure is 3500 mm. The

structure is braced with beams about the y-y axis only and all beams are 550 x 250 mm and slabs are

180 mm thick. If the column dimensions are 500 mm in the y-direction and 400 mm in the x-direction

calculate the effective height for the column about each axis and state whether the column is short or

slender.

A central circular column is 500 mm in diameter and supports approximately equal arrangements of

beams. If the column carries an axial load of 3500 kN at the ground floor level and given the

characteristic strength of concrete as 40 Mpa and steel is 450 Mpa design the column. Information not

given shall be reasonably assumed.

20 Marks

[100]


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9 OTHER ASSESSMENT METHODS

None

10 EXAMINATION

Use youre my Studies@Unisabrochure for general examination guidelines and examination preparation

guidelines.

11 FREQUENTLY ASKED QUESTIONS

The my Studies@Unisabrochure contains an A-Z guide of the most relevant study information

12 SOURCES CONSULTED

Refer to section 4

13 CONCLUSION

Wishing you success in your studies

14 ADDENDUM

None

Reinforced concrete Design Syllabus

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