Concrete-filled steel tube (CFST) columns are used in tall buildings and bridges, they provide more rigidity higher bearing capacity, but buckling affects their behavior. There is an exceptional need to study the behavior of these under various conditions. The numerical method beneficial supplementing experimental works explore effects parameters because limitations cost, apparatus, time progra...

Abstract Composite sections are found to be a novel technique in modern day scenario of construction. This stands tall than the ordinary and conventional type constructions. Columns as structural element play vital role frame. research comments on behavior composite columns. The main objective this study is analyze steel-encased concrete columns experimentally under axial compression mode failu...

The paper discusses the structural behaviour of concrete-filled steel tube columns (CFT) when applied to top-down construction method as temporary internal supports for ceilings. Their ultimate capacity take into account actual boundary conditions column is essential successful application in construction. presents full-scale situ testing four slender specimens with variable D/t ratios under co...

We analyze the initiation and propagation of adiabatic shear bands in a thick-walled 4340 steel tube with a V-notch in the middle. The material is modeled as strain hardening, strain-rate hardening and thermal softening. The deformations are assumed to be locally adiabatic and the effect of inertia forces is considered. Two different loadings, i.e., torsional, and combined torsional and axial p...

        Sensitivity analysis of structures considering their nonlinear behavior has recently been an important process in optimal design of them based on new design concepts such as Performance-Based Design (PBD). The main objective of this research is to develop an efficient and applicable method for nonlinear sensitivity analysis of Reinforcement Concrete Moment Resisting Frames (RCMRF) accou...

Partially Encased Composite (PEC) column is one of the recent achievements in the field of composite columns. This paper presents a combined experimental and theoretical study on the mechanical performances of six octagonal PEC columns subjected to axial compressive and bending moment loading. The major different between them was the concrete reinforcement details. The parameters studied in the...

In this study, the behavior characteristics of I beam-to-concrete filled tube (CFT) column connection is studied through experiment and finite element models under the monotonic loading. To validate the finite element modeling, at first, an experimental model is made and experimented. After validation of the finite element modeling, different models were created in the software. The studied par...

Energy absorber systems like metallic dampers for controlling the structural vibrations due to earthquake have witnessed considerable development in the past few decades. Also there are some studies on the energy absorption of thin-walled tubes due to impact load. Thin-walled tubes have a large deformation capacity and are suitable energy absorbers in the structure during an earthquake provided...