in this paper, load and buckling mode of a smart column are presented. the theoretical model is a three-layer piezoelectric composite beam that behaves as an axial actuating mechanism. this actuator consists of an elastic core sandwiched between two piezoelectric active outer layers. the piezoelectric layers are polarized transversely, i.e., the polarization vector is parallel to the applied el...

An experimental and numerical study on the octagonal high-strength steel tubular stub columns under combined compression bending is presented in this paper. Octagonal column specimens with different sizes were prepared. Experiments performed these concentric or eccentric compression, which induced various combinations of structures. In addition, a through finite-element modeling was also conduc...

The aim of this study was to improve the characteristics natural collapsible soils using geogrid-encased stone column technique. For purpose, 20 large-scale specimens columns were prepared rigid metal cylinders with a diameter 308 mm and height 97 154 according unit cell theory. aspect ratio 10% 25%. occurrence bulging failure, considered six times diameter. encased geogrids varying stiffness f...

A composite ice nanotube inside a carbon nanotube has been explored by molecular-dynamics and grand canonical Monte Carlo simulations. It is made from an octagonal ice nanotube whose hollow space contains hydrophobic guest molecules such as neon, argon, and methane. It is shown that the attractive interaction of the guest molecules stabilizes the ice nanotube. The guest occupancy of the hollow ...