Title:
Design of Reinforced Concrete Bridge Columns Subjected to Imposed Deformations
Author(s):
Deepak Choudhury, Antonio R. Mari, and Alex C. Scordelis
Publication:
Structural Journal
Volume:
85
Issue:
5
Appears on pages(s):
521-529
Keywords:
bridges(structures); columns (supports); creep properties; deformation; frames; prestressing; reinforced concrete; shrinkage; structural analysis; structural design; temperature; Design
DOI:
10.14359/3135
Date:
9/1/1988
Abstract:
A method for designing reinforced concrete bridge columns subjected to short- and long-term imposed end deformations is presented. Prismatic columns with symmetrically reinforced rectangular cross sections under uniaxial bending are considered. The design is based on the capacity of the column to resist a given axial load, imposed end displacement, and end rotation. Column deformation capacities are obtained using PCFRAME, a finite element computer program capable of performing nonlinear geometric, material, and time-dependent analyses of planar reinforced and prestressed concrete frames. The proposed method is demonstrated through a design example and is compared with a currently common design practice. Considerable economy in design can be achieved with the proposed method primarily because it considers the beneficial effects of column creep on the end displacement capacities of the columns.