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|Title: ||Analysis and Design of Precast - Cast in Situ Concrete Composite Bridges|
|Authors: ||Kitaw, Zewde|
|Advisors: ||Dr.Asnake Adamu|
|Keywords: ||civil engineering|
|Copyright: ||Nov-2005 |
|Date Added: ||3-May-2012 |
|Abstract: ||The weather condition and the terrain of Ethiopia need a number of bridges to be constructed for
every km length of the roads. In addition to this the bridges constructed during the occupation of
Ethiopia by Italian government are aged and deteriorated. These bridges require maintenance or
Considering the nature of this need and construction of new roads, the Ethiopian government
investing billions of birr for road sector development out of which more than 30% of the project
cost is assigned to the construction of bridges.
In spite of the large number of bridge construction in the country, the method of construction of
cast in place concrete requires long time of construction and tremendous volume of false work.
Further more, un expected non-seasonal rainfall may occur at the up stream of bridge
construction site and affect the constructed false work partially or damage it as a whole.
Thus, this study has attempted to analyze, design and compare the amount of time and false work
saved by constructing composite concrete bridges against fully cast in place concrete bridges.
The quantities of construction material like concrete and reinforcing bars were increased in
construction of composite bridges. Further equipments like crane and law bed are used in
composite construction. As per the analysis, design and cost comparison, the developed system
offer a better economic alternative in view of overall cost of construction practiced in the
The intention of this thesis is therefore to develop analysis and design procedure of a precast-cast
in place concrete composite bridge that can be constructed out side of the site or near the site,
transported and erected at the site and completed with in less time than the time required for
bridge construction practiced in the country. The developed procedure is illustrated using
practical example where saving in cost is compared.|
|Appears in:||Thesis - Civil Engineering|
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