ANALYSIS AND DESIGN OF PRESTRESSED CONCRETE BRIDGE

(A Case Study of Oyun River along Tanke-Yakuba)

By

Dauda, A. Y.(10/30GB105)

PROJECT SUPERVISOR: DR. S.A. RAJI

July, 2014

AIM & OBJECTIVESThe aim of this project is to analyze and design a prestressed concrete bridge to link Tanke F division area with Apata Yakuba in Ilorin. The specific objectives used in achieving this are; Obtaining measurement for the width and depth of the river Determining the reactions at the bridge support, stresses on girders and walls,

and deformation on the bridge using Midas CIVIL engineering software

SCOPE AND LIMITATIONThis project focuses on analysing and designing a prestressed concrete bridge. The project is limited to the modeling, detailed analyses and design of the bridge with Computer Aided Design software (MIDASCivil) and comparing results with that obtained from the manual analysis of a major girder of the bridge..

INTRODUCTION

A bridge is a structure erected to span natural or artificial obstacles, such as

rivers, highways, or railroads, and supporting a footpath or roadway for

pedestrian, highway, or rail road traffic. A number of different methods

may be used to classify bridges. Bridges can be classified according to

materials (concrete, steel, or wood), usage (pedestrian, highway, or

railroad), span (short, medium, or long), or structural form (slab, girder,

truss, arch, suspension, or cable-stayed).

METHODOLOGYModeling of the bridge

Computer aided analysis of the bridge

Computation of reactions, stresses and deformations on the bridge using Midas CIVIL engineering software

Manual Analysis of the bridge to serve as a check

COMPUTER MODELLING PROCEDURE USING MIDAS CIVIL

Result interpretation

Running analyses and designing

Defining traffic lanes

Defining loads

Defining material/section properties

Importing and editing model

RESULT & DISCUSSION

From manual and MIDAS calculations The stresses in girder (No 895) are

LEVEL MANUAL MIDAS

1 BOTTOM

2 TOP

CONCLUSION 1. Based on the results from both manual and computer

application, it can be concluded that the bridge girder (No 895) has a stress of at the bottom of the beam and at the top of the beam from the manual calculation while the computer aided analysis gave at the bottom and at the top.

2. The use of the finite element method of analysis was justified and the application of the MIDAS/ Civil software was found to be time saving, less tiring and of higher accuracy compared with rigorous manual method of analysis.

RECOMMENDATION

1. It is recommended that the use of this software be treated

in broad term for all engineers due to its wide

applications.

2. More research should be carried out in the future on

better ways of structural modeling and analysis of

bridge.

REFERENCE

Barker R. M and Puckett (2007). Design of highway bridges. John Wiley & Sons, Inc. Canada

Chen W.F. and Duan L. (2000). Bridge Engineering Handbook. CRC Press, Boca Raton, FL

Gurfinkel G. and Khachaturian N (1965). Ultimate design of prestressed concrete beams. University of Illinois Bulletin, Volumn 62, Number 79

Jackson P. (2008). Design of reinforced concrete bridges. ICE Manual of Bridge Engineering

Knippers, J and Gabler, M (2006). New Design Concepts for Advanced Composite Bridges – The Friedberg Bridge in Germany. IABSE Symposium pp. 16-23(8). International Association for Bridge and Structural Engineering

Lai S.G. (1998). Guidelines for design of small bridges and culverts. Journal of the Indian Roads Congress

Mekdam N, Nolan D, and Tony R (2010).Design and Construction of the Saint Albert Bridge. Annual Conference of the Transportation Association of Canada. Nova Scotia