BEHAVIOR OF CONCRETE FILLED STEEL TUBES--PART 1, COMPRESSION MEMBERS

In our country, bridge piers are subjected to strong motions due to earthquake. Furthermore, size of bridge piers are strictly limited in metropolitan highways and in monorails. High ductility and high resistance is, therefore, required for bridge piers in Japan. In this regard, use of concrete-filled steel tubes is examined. Steeel Tubes have pretty high resistance; however, steel tubes are liable to yield local buckling and to lose ductility after yielding local buckling. Concrete piers with adequate reinforcing have good ductility; however, they are large-sized. Concrete-filled steel tubes are thin steel tubes with concrete and shear connectos in the tubes. Then they are subjected to a strong motion, concrete prevents the local buckling of thin steel tubes, steel tubes giving adequate reinforcing to the concrete. Therefore, even small-sized concrete-filled steel tubes have excellent ductility and resistance. Sometimes, concrete-filled steel tubes were used for bridge piers or building members. However, they were used just to increase the not designed as composite structures. In our report, concrete-filled steel tubes are regarded as composite structures to expect higher resistance and ductility. At present, many problems are not settled to design concrete-filled steel tubes as composite structures, such as provisions for shear connectors, plate thickness and so on. In the report, these problems are examined in detail, based on the results of full-size tests, and design recommendations are presented. (Author)

• Supplemental Notes:
  • Seismic Research for Highway Bridges (US-Japan Program) is a collection of Papers Reprinted Directly from the United States-Japan Cooperative Program on Natural Resources (UJNR) Panel on Wind and Seismic Effects; and the Proceedings of the US-Japan Seminars on Repair and Retrofit of Structures, 1979 to 1984.
• Corporate Authors:

  Pittsburgh University, Pittsburgh

  Department of Civil Engineering
  Pittsburgh, PA  United States  15261

  National Science Foundation

  1800 G Street, NW
  Washington, DC  United States  20550
• Authors:
  • Narita, N
  • SAEKI, S
  • Kanai, M
  • Ohshio, T
• Publication Date: 1984-6

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: p. 145-189
• Serial:
  • Publication of: Pittsburgh University, Pittsburgh
  • Publisher: Pittsburgh University, Pittsburgh

Subject/Index Terms

• TRT Terms: Buckling; Ductility; Material reinforcement; Reinforced concrete; Seismicity; Steel pipe; Structural supports
• Uncontrolled Terms: Compression members; Seismic response
• Old TRIS Terms: Resistance
• Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00394005
• Record Type: Publication
• Files: TRIS
• Created Date: Jul 31 1985 12:00AM