HYSTERESIS CURVE OF STEEL CONCRETE COLUMNS WITHOUT COVER CONCRETE

Abstract

We confirmed the mechanical behavior of steel concrete columns of symmetric and non-symmetric cross section through the structural tests under the axial load and the cyclic horizontal load. The experimental parameters were as follows, axial load level and shapes of cross section. The structural tests make it clear that the shape of the loops for steel concrete columns is spindle, and ductility decreases under the high axial compression. Moreover, we showed that ultimate flexural strength can be evaluated to superposed strength method, in which the ultimate strength of the section of steel flange, steel web and concrete, and proposed evaluation method of restoring force characteristics matches the test result well.