Hollow cylindrical multi-walled hybrid nanotubes go through dynamic growth and subsequent disappearance during the biomimetic fabrication of hexagonal calcite platelets, simulating the in vivo purpose-driven self-assembly of tubular plasma-membrane calcium-ion channels for biomaterials to adapt, respond and repair.

A comprehensive computational model to simulate the nonlinear seismic response of composite frames with rectangular concrete-filled steel tube (RCFT) beam-columns and steel girders and braces is presented in this work. A three-dimensional fiber-based distributed plasticity mixed finite element formulation is introduced. The finite element formulation of RCFT beam-columns was derived with separa...

Well-defined carbon polyhedrons with faceted morphologies and hollow internal structures made of self-organized multi-walled carbon nanotubes have been fabricated by gas phase catalytic CVD inside microchannels, of which the confined space is critical for the formation of polyhedral structures with hexagonal, heptagonal and octagonal cross-sections that show superhydrophobic properties, with th...

Stainless steel circular hollow section (CHS) members have been widely used in building structures because of their comparable strength to structural carbon steels, attractive appearance and excellent corrosion resistance. However, research on stainless CHS has limited cold-formed members, whereas hot-rolled columns received less attention. To this end, the flexural buckling performance duplex ...

Composite columns are often used in constructing high-rise structures because they can reduce the size of a building's while increasing usable area floor plan. This research aimed to develop nonlinear 3D finite element analysis model using ABAQUS, version 6.13-4, various round composite column designs with varied multi-skin tubes for solid and hollow subjected eccentricity loads (90, 180 mm). E...

Concrete filled tubes (CFTs) composite columns have many economical and esthetic advantages, but the behavior of their connections is complicated. Through this study, it is aimed to investigate the performance and behavior of different connection configurations between concrete filled steel tube columns and bracing diagonals through an experimental program. The study included 12 connection suba...

In this paper, a numerical solution has been developed for hollow circular cylinders made up of orthotropic material which is subjected to twist using micro polar theory. The effect of twisting moment and material internal length on hollow thick-walled circular cylinder made up of micro polar orthotropic material is investigated. Finite difference method has been used to exhibit the influence o...

This paper describes an investigation into the cross-sectional behaviour of elliptical hollow section (EHS) columns made from ferritic and duplex stainless steel. The EHS is a relatively new structural shape with number favourable attributes including aesthetic appeal, high strength-to-weight ratio, good torsional resistance excellent flexural strength. In recent years there have been significa...

This paper presents an experimental and numerical investigation into the post-fire behaviour residual capacity of S700 high strength steel circular hollow section (CHS) beam–columns. The was performed on ten CHS beam–columns included heating cooling specimens as well material testing, initial global geometric imperfection measurements pin-ended eccentric compression tests. A subsequent conducte...