Geometrical metallic shell behavior study under compression

Abstract

SRCFT columns are formed by inserting a steel section into a concrete-filled steel tube. These types of columns are named steel-reinforced concrete-filled steel tubular (SRCFT) columns. The current study aims at investigating the various types of reinforcing steel section to improve the strength and hysteresis behavior of SRCFT columns under axial and lateral cyclic loading. To attain this objective, a numerical study has been conducted on a series of composite columns. First, FEM procedure has been verified by the use of available experimental studies. Next, eight composite columns having different types of cross sections were analyzed. For comparison purpose, the base model was a CFT column used as a benchmark specimen. Nevertheless, the other specimens were SRCFT types. The results indicate that reinforcement of a CFT column through this method leads to enhancement in load-carrying capacity, enhancement in lateral drift ratio, ductility, preventing of local buckling in steel shell, and enhancement in energy absorption capacity. Under cyclic displacement history, it was observed that the use of cross-shaped reinforcing steel section causes a higher level of energy dissipation and the moment of inertia of the reinforcing steel sections was found to be the most significant parameter affecting the hysteresis behavior of SRCFT columns.

Effect of heat treatment on the blast loading response of combined geometry shell core sandwich structures

“…Shahi and Marzbanrad [12] investigated the crushing behavior of segmented thin walled tubes. Sahu and Gupta [13] studied the large deformation of a combined geometry consisting of three individual geometries, namely an end-capped cylinder, a frusta, and a spherical crater. The increase in the thickness of shell resulted in higher buckling loads and changed the location of fold initiation and the fold thicknesses varied with the friction coefficient.…”