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Behavior of concentrically loaded CFT braces connections

Maha M Hassan¹, Hazem M Ramadan¹, Mohammed N Abdel-Mooty¹

¹Department of Civil Engineering, Cairo University, Gamaa Street, Giza, Egypt.

Journal of Advanced Research

|February 17, 2015

Summary

Investigating concrete filled tubes (CFTs) connections revealed that connection detailing significantly impacts capacity, failure modes, ductility, and stress distribution in CFT composite columns.

Area of Science:

Structural Engineering
Materials Science

Background:

Concrete filled tubes (CFTs) offer economic and aesthetic benefits in composite columns.
The complex behavior of CFT connections necessitates detailed investigation.

Purpose of the Study:

To experimentally evaluate the performance of various connection configurations between CFT columns and bracing diagonals.
To understand how different connection details influence structural behavior.

Main Methods:

An experimental program involving 12 connection subassemblies was conducted.
Subassemblies featured fixed-length steel tubes with gusset plate connections, subjected to cyclic loading.

Main Results:

Connection detailing significantly affected the capacity and failure modes of the CFT connections.
Ductility and stress distribution patterns were notably altered by changes in connection design.

Conclusions:

Connection design is a critical factor in optimizing the performance of concrete filled tube composite structures.
Further research into specific detailing strategies can enhance the reliability and efficiency of CFT connections.

Keywords:

Concrete filled tube (CFT) columns Connections Detailing Ductility Strength

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