A Synopsis of Studies of the Monotonic and Cyclic Behavior of Concrete-Filled Steel Tube Members, Connections, and Frames

A significant amount of research has been conducted worldwide on the behavior of concrete filled steel tubes (CFTs) in the past five decades. This report provides a summary of the behavior and experimental work of concrete filled steel tube members, connections, and frames that are reported in detail in the literature. These published studies have been summarized with an emphasis on experimental setup and properties, analytical methods presented, and key results from the work. A detailed summary of the behavior of CFTs under various loading conditions is presented in the first chapter. In the second chapter, summaries of selected experimental and analytical work are presented. The third chapter contains tables documenting experimental data from the summarized work. The fourth chapter presents a categorization of tests on CFT beam-columns, sorting the experimental work by material and geometric properties. The tables in chapters three and four provide a quick reference to a wide range of published experiments. Several topics (e.g. box columns, fire studies) have been excluded from the main report for brevity, as have publications that summarize CFT research more briefly, but references to these studies have been placed in a supplemental bibliography. This report constitutes Version 4.0 of this synopsis, with prior versions being issued in 1993, 1995, and 2001 as follows: Gourley, B. C., Tort, C., Hajjar, J. F., and Schiller, P. H. (2001). “A Synopsis of Studies of the Monotonic and Cyclic Behavior of Concrete-Filled Steel Tube Beam-Columns,” Structural Engineering Report No. ST-01-4, Department of Civil Engineering, University of Minnesota, Minneapolis, Minnesota, Version 3.0, December, 262 pp. Gourley, B. C., Hajjar, J. F., and Schiller, P. H. (1995). “A Synopsis of Studies of the Monotonic and Cyclic Behavior of Concrete-Filled Steel Tube Beam-Columns,” Structural Engineering Report No. ST-93-5.2, Department of Civil Engineering, University of Minnesota, Minneapolis, Minnesota, Version 2.0, June, 133 pp. Gourley, B. C. and Hajjar, J. F. (1993). “A Synopsis of Studies of the Monotonic and Cyclic Behavior of Concrete-Filled Steel Tube Beam-Columns,” Structural Engineering Report No. ST-93-5.1, Department of Civil and Mineral Engineering, University of Minnesota, Minneapolis, Minnesota, Version 1.0, October, 101 pp.