Design Aids for Calculating Idealized Moment-Curvature Relationships of Circular Reinforced Concrete Bridge Columns
Publication: Practice Periodical on Structural Design and Construction
Volume 28, Issue 4
Abstract
This manuscript first presents the development and then the implementation of simple design aids that allow bridge engineers to quickly estimate idealized moment–curvature relationships for circular concrete columns in compliance with current specifications by using a pocket calculator or a spreadsheet. The design aids were developed in a normalized domain so they are particularly convenient for preliminary stages of design when the engineer may want to know the nonlinear static (pushover) response of circular columns for selected reinforcement ratios (longitudinal and transverse) and axial load levels. The formulation is applicable to column diameters up to 2.44 m (8 ft), longitudinal reinforcement ratios () from 1% to 3%, spiral reinforcement ratios () from 0.5% to 2.5%, nominal concrete compressive strengths () from 28 MPa (4 ksi) to 56 MPa (8 ksi), axial loads from (tension) to (compression), and grade 420 MPa (60 ksi) reinforcement. Application examples are presented to illustrate the use of the design aids and to validate the obtained results with commercially available software.
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Data Availability Statement
Data, models, or code that support the findings of this study are available from the author upon request. These include SAP2000 models and spreadsheets.
References
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© 2023 American Society of Civil Engineers.
History
Received: Jan 2, 2023
Accepted: Jul 6, 2023
Published online: Aug 28, 2023
Published in print: Nov 1, 2023
Discussion open until: Jan 28, 2024
ASCE Technical Topics:
- Axial loads
- Bridge columns
- Bridge components
- Bridge design
- Bridge engineering
- Bridges
- Bridges (by material)
- Columns
- Concrete
- Concrete bridges
- Concrete columns
- Design (by type)
- Engineering fundamentals
- Engineering materials (by type)
- Engineering mechanics
- Load and resistance factor design
- Load factors
- Materials engineering
- Reinforced concrete
- Static loads
- Statics (mechanics)
- Structural design
- Structural engineering
- Structural members
- Structural systems
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