Experimental Investigation of the Effect of Filled Steel Tubular with Various Sand Grains Diameters on the Buckling Behavior

Abstract

An experimental study of the sand filled steel tubular (SFST) column structure was considered in this paper to enhance the composite structures of the seismic steel design to study the effect of using different sand grains of (0.15, 0.3, 0.6, 1.18 and 2.36 mm). Twelve specimens filled-steel tubular Type-316 with different outer diameters of (13, 17 and 19 mm) with constant thickness of (1.0 mm) and different lengths of (15, 20, 25 and 30 cm) are considered. Experiments were carried out for two different cases: Hollow and compacted sand in order to know the behavior and buckling load of above columns and tests were conducted under monotonic loading. Major conclusion from this study are: the maximum load carrying capacity found in tubes with sand grain give an increasing by (0.8, 7.8, 8.5, 8.7, 6.2 and 25.4 %) if test steel tubular filled by sand grain size of (0.15, 0.3, 0.6, 1.18 and 2.36 mm) respectively as compared with the hollow empty specimen at the same displacement and at specimen diameter of (13 mm) and length of (15 cm). Also, observed that the using steel tubular with sand will delayed the buckling process as compared with the hollow empty steel tubular. Finally, the buckling behaviors of the present study were compared with the previous study and give a good agreement for the load-displacement curve for the all specimens studied.