เสาเหล็กสี่เหลี่ยมหน้าตัดกลวงเติมคอนกรีตในรูภายใต้แรงกระทำวนซ้ำ

Abstract

This paper presents an experimental study on the response of rectangular hollow steel columns under cyclic loading. All 6 specimens had identical dimensions as 100´100 mm. and  1.8 mm. thick cross-section with  500 mm. length. The parameters were (1) concentric loadings, i.e. cyclic and compressive repeated loadings and (2) filling materials, i.e. No fill, concrete infilled and mortar infilled columns. The tested results indicate that all specimens exhibited local buckling in which stable post-buckling strength could be observed for the infilled columns with higher bearing capacity corresponding to the ultimate strength of infilled materials.  In addition, degradation of capacity under highly inelastic deformation can be effectively controlled.