A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Redistribution of Stresses in Segmentally Erected Prestressed Concrete Bridges
A study of time dependent moment redistribution in segmentally erected prestressed concrete bridges is presented. The phenomenon of moment redistribution due to changes in the structural system of the bridge, and an approximate approach commonly used for the prediction of such moment redistribution are discussed. The shortcomings of this approach and the need for a more precise approach are discussed. A numerical method and computer program for the time dependent analysis of segmentally erected prestressed concrete bridges is developed. A mathematical model for creep of the concrete is developed. The program is capable of the time dependent analysis of frame structures under time dependent force and displacement boundary conditions. Moment redistribution in bridges built using the cantilever method is investigated and discussed in detail. Based on the investigation, an approach for the design and analysis of segmentally erected bridges, using approximate methods for the preliminary design and the new computer program for final design checking and construction monitoring, is presented.
Redistribution of Stresses in Segmentally Erected Prestressed Concrete Bridges
A study of time dependent moment redistribution in segmentally erected prestressed concrete bridges is presented. The phenomenon of moment redistribution due to changes in the structural system of the bridge, and an approximate approach commonly used for the prediction of such moment redistribution are discussed. The shortcomings of this approach and the need for a more precise approach are discussed. A numerical method and computer program for the time dependent analysis of segmentally erected prestressed concrete bridges is developed. A mathematical model for creep of the concrete is developed. The program is capable of the time dependent analysis of frame structures under time dependent force and displacement boundary conditions. Moment redistribution in bridges built using the cantilever method is investigated and discussed in detail. Based on the investigation, an approach for the design and analysis of segmentally erected bridges, using approximate methods for the preliminary design and the new computer program for final design checking and construction monitoring, is presented.
Redistribution of Stresses in Segmentally Erected Prestressed Concrete Bridges
M. A. Ketchum (author)
1986
245 pages
Report
No indication
English
Redistribution of Stresses in Segmentally Erected Prestressed Concrete Bridges
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