Title:
Computer Analysis of Spliced Girder Bridges
Author(s):
Ahmad M. Abdel-Karim and Maher K. Tadros
Publication:
Structural Journal
Volume:
90
Issue:
1
Appears on pages(s):
21-31
Keywords:
bridges (structures); computer programs; continuity (structural); deflection; girders; I-beams; post-tensioning; precast concrete; splicing; prestressed concrete; segmental construction; serviceability; Structural Research
DOI:
10.14359/4190
Date:
1/1/1993
Abstract:
To meet the growing demand for long span bridges, techniques for increasing the span range of existing girder shapes by splicing relatively short girder segments have been developed over the last 30 years. The state-of-the-art of spliced-girder bridges is reviewed briefly, followed by a description of a computer-based procedure for analysis of composite precast concrete girder bridges with cast-in-place topping. The computer program can be employed to evaluate stresses in concrete and steel at any cross section in a statically indeterminate composite beam or plane frame. It also gives the deflection at various stages of construction. The method of analysis presented here is also applicable to other types of multistage construction and prestressing involving the use of temporary falsework. A numerical example is presented to illustrate the hand calculations involved and the use of the computer program.