1995 Volume 60 Issue 468 Pages 155-164
In this paper the ultimate strength of Concrete-filled steel tube, designated as "CFT", is discussed. It is reported to have the different strength depending on the loading style, uniform or gradient bending moment. The plastic hinge length for collapse can be evaluated through the accurate curvature distribution by an original measuring system using a laser beam transducer. The individual contribution of concrete and steel tube can be made clear experimentally by the newly developed loading method tracing deformation path. In conclusion the estimation formula is proposed in consideration of the loading style.
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