bridge design report.docx 150.docx

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ENCV4GS 20th April 2011

Group 2 Page 1

Group Plagiarism Declaration ..................................................................... 3

Introduction ................................................................................................. 4

Chapter 1 .................................................................................................... 4Site investigation ......................................................................................... 4

Construction Brief ....................................................................................... 5

Chapter 2 .................................................................................................... 5

Loads on the deck ..................................................................................................................................... 5

Design assumptions .................................................................................................................................. 6

Special features ......................................................................................................................................... 6

Codes of practice and standards used in the design ................................................................................ 6Reference documents ............................................................................................................................... 7

Design life and material strength ...............................................................Error! Bookmark not defined.

Calculations with sketches ........................................................................................................................ 7

Chapter 3 .................................................................................................... 8

Pre-tensioned beam ................................................................................... 8


Codes of practice and standards used in the design ................................................................................ 9

Reference documents ............................................................................................................................... 9

Calculations with sketches ........................................................................................................................ 9

Chapter 4 .................................................................................................... 9

Column ....................................................................................................... 9


Special features ......................................................................................................................................... 9

Codes of practice and standards used in the design .............................................................................. 10

Reference documents ............................................................................................................................. 10

Calculations with sketches ...................................................................................................................... 10

Chapter 5 .................................................................................................. 10

Design assumptions ................................................................................................................................ 10

Special features ....................................................................................................................................... 10


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Chapter 6 .................................................................................................. 11

Retaining wall ........................................................................................... 11





Design life and material strength ............................................................................................................ 12


Chapter 7 .................................................................................................. 12

Pile foundation .......................................................................................... 12






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UNIVERSITY OF KwaZulu Natal School of Civil Engineering

Group Plagiarism Declaration

ENCV4GS Ground and structures 20/04/2012Course ID Course Name Date

4TH

Bridge design Project

Session & Year Title of Assessment Task to which this Declaration applies

We the undersigned, individually declare that:

the percentages listed below represent a fair indication of the proportional contribution made by each

member of the group submitting this piece of work for assessment;

my contribution to this assessment item is my own work, except where acknowledged, and has not

been submitted for academic credit elsewhere;

all reasonable care has been taken to ensure that no other person has been able to copy this work

either in paper or electronic form.

We acknowledge that the assessor of this item may, for the purpose of assessing this item:

reproduce this assessment item and provide a copy to another member of the University; and/or,

Communicate a copy of this assessment item to a plagiarism checking service (which may then retain

a copy of the assessment item on its database for the purpose of future plagiarism checking).

We certify that we have each read and understood the University Rules in respect of Student Academic

Misconduct.

Student Number Student Name Signature

205522119 Mpho Nephembani


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Introduction

Chapter 1

Site investigation


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Construction Brief

Chapter 2

Loads on the deck

Permanent action, this includes self weight of the structural elements. The density of reinforce

concrete was taken as 25kN/m

3

(EN7). The nominal thickness of the surfacing, including waterproofing layer was taken as 25mm, the self weight of the kerbs and hand railing was also

included. Pedestrian traffic load of 5kN/m2

(THM 7 part 1 and 2) was use for this bridge design

exercise (see calculation sheet provided with the report for the calculation of the loads)

Design of the deck

Reinforced concrete is the concrete in which reinforcing bars (rebars) have been incorporated

to strengthen the concrete in tension. Concrete is strong in tension, but weak in tension, thus

adding reinforcement increases the strength in tension.

The reinforcement determined in this section is based on the maximum positive moment in the

slab and maximum negative moment over the cantilever (see the calculation sheet for


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diagrams). Shear checks was done using the maximum shear force, deflections was checked for

the cantilever and the simply supported part and these were found be within the range.

The following parameters were used for the analysis purpose and design.

Slab thickness = 150mm (note that this is the effective slab thickness ignoring surfacing

layer (i.e. integral wearing surface)

Surfacing thickens = 25 mm

Unit weight of concrete (concrete) = 25 kN/m3

( EN 7)

Concrete cover = 40mm ( table 19 SABS 0100-2)

Kerbs =250 mm 250 mm

Fcu (cube strength) = 40 Mpa Fy , Fyv (high tensile) =450 MPa

Design assumpt ions

The following assumptions were used for analysis and design purpose:

Assume the slab is simply supported and is spanning in on direction.

Self weight is based on the nominal dimension

Assume the slab thickness of 150mm and a surfacing thickness of 25mm.

Assume the self weight of the hand rail to be a point load acting at the center.

Ignore wind loading

Ignore thermal loading

Ignore reinforcement for shrinkage and temperature stress

Special features

Codes of pract ice and standards used in the design

Bridge Design Code TMH 7 Part 2, 1981, Pretoria South Africa.

The structural used of concrete code SABS 01001-1, 2000, edition 2.2, Published by South

African bureau of Standards.


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Detailing of steel reinforcement for concrete code SABS 0144, 1995. Edition 2, Published by

South African Bureau of Standards.

Reference documents

Charles Edward Reynolds, Charles E. Reynolds, James Cyril Steedman. (2007). Reynoldss

reinforced concrete designers handbook. London: Taylor and Frances London.

Craig, R. R. (1999). Machananics of materials. New York: John Wiley & Sons.

Structural Design 1 Class notes, 2009, University of KwaZulu Natal

Structural Design 2 class notes, 2010, University of KwaZulu natal

Calculat ions w ith sketches


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Chapter 3

Pre-tensioned beam

Design assumpt ions


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Reference documents


Chapter 4

Column

Design assumpt ions

Special features


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Reference documents


Chapter 5

Pile cap

Design assumpt ions

Special features


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Reference documents


Chapter 6

Retaining wall

Design assumpt ions

Special features



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Reference documents

Design l i fe and mater ial strength


Chapter 7

Pile foundation

Design assumpt ions


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Special features


Reference documents


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