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Steel and Composite Structures
  Volume 4, Number 4, August 2004, pages 265-280

Polymer concrete filled circular steel beams subjected to pure bending
Walter O. Oyawa, Kunitomo Sugiura and Eiichi Watanabe

     In view of the mounting cost of rehabilitating deteriorating infrastructure, further compounded by intensified environmental concerns, it is now obvious that the evolvement and application of advanced composite structural materials to complement conventional construction materials is a necessity forrnsustainable construction. This study seeks alternative fill materials (polymer-based) to the much-limited cement concrete used in concrete-filled steel tubular structures. Polymers have been successfully used in other industries and are known to be much lighter, possess high tensile strength, durable and resistant tornaggressive environments. Findings of this study relating to elasto-plasticrncharacteristics of polymer concrete filled steel composite beams subjected to uniform bending highlight the enormous increase in stiffness, strength and ductility of the composite beams, over the empty steel tube. Moreover, polymer based materials were noted to present a wide array of properties that could be tailored to meet specific design requirements e.g., ductility based design or strength based design. Analytical formulations for design are also considered.
Key Words
    composite section; polymer concrete; flexural strength.
Walter O. Oyawa; Department of Civil Engineering, JKUAT, P.O. Box 62000-00200, Nairobi, KenyarnKunitomo Sugiura

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