Design Aid for Composite Columns (Concrete Filled Tubes)
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Date
2005-07
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Addis Ababa University
Abstract
Composite Columns Are In An Increased Usage For Construction Of Highrise
And Medium-Rise Buildings, Bridges And Other Structures. However,
Their Designs Involves Tiresome Calculations And Drawing Of Interaction
Charts. In Addition, The Results Are Approximate. This Thesis Presents
Design Aids For Concrete-Filled Steel Tubes To Simplify The Design And At
The Same Time Increase The Accuracy Of Results. It Also Summarizes
Important Behaviors Of Concrete-Filled Tube Columns As Compared To
Other Column Types.
General Approaches Have Been Presented On How To Prepare Design
Charts And Such Charts Have Been Drawn For Selected Cross-Sectional
Shapes. Uniaxial Charts Have Been Drawn For Square, Rectangular,
Hexagonal And Octagonal Shapes Whereas Biaxial Chart Is Drawn For
Square Section. This Thesis Also Provides Guidelines To Easily Develop
Other Charts For Other Shapes And Material Types That Were Not
Considered.
Numerical Examples Have Been Presented To Illustrate The Application
Of The Charts For The Design Of Composite Cross-Sections. Results Have
Been Compared With Those Obtained Using The Procedure Outlined In
EBCS 4-1995 And Have Shown Close Similarity. The Accuracy Of
Viii Biaxial Charts As Compared With The Approximate Method In EBCS 4-
1995 Has Also Been Shown With The Help Of A Numeric Example.
Keywords: Concrete-Filled Tubes, Uniaxial Bending, Biaxial Bending,
Plastic Capacity, Interaction Chart
Description
Keywords
Concrete-Filled Tubes; Uniaxial Bending; Biaxial Bending; Plastic Capacity;Interaction Chart