Analysis of horizontally curved post-tensioned segmental concrete box girder bridges

Date of Award




Degree Name

Doctor of Philosophy (Ph.D.)

First Committee Member

Ahmad H. Namini - Committee Chair


This report presents the background and details of a numerical procedure developed specifically for the longitudinal analysis of curved segmentally erected prestressed concrete box girder bridges. It is based on a skew ended thin-wall beam element including the modes of warping and distorsion of the cross section. The cross section must consist of a single cell, may have overhangs, and may be variable along the girder. The main advantage of this method is that it provides a discrete subdivision in the longitudinal direction into beam elements. Therefore, it does not demand the tremendous amount of data preparation and time required to interpret results if the bridge analysis was conducted by using plate and/or shell finite elements. The use of the numerical procedure is demonstrated by means of several examples. Comparisons with analytical and experimental results are made.Three actual curved segmental bridges were analyzed in this study. For these bridges it was determined that the concrete box girder behaved essentially as a conventional beam: warping and distorsion stresses can be justifiably neglected.


Engineering, Civil

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