Experimental research was conducted to study the fire resistance of steel tubular columns used in prefabricated and modular construction. In order to achieve high-efficient prefabrication and fast on-site installation, membrane protections using board products and thermal insulation blankets are adopted as the favorable protection method. Three protected tubular columns were tested in a full-sc...

Bridges are often built in locations susceptible to multiple extreme hazards. Meeting some or all of these constraints drives the development of innovative multi-hazard design concepts. This paper presents the results of research conducted to develop and experimentally validate such multi-hazard bridge pier concepts. The first concept is a pier-bent made of concrete filled steel tube columns. F...

in this paper, synthesized (raw) multi-walled carbon nanotube (rmwcnts) surfaces were modified with chitosan and β-cyclodextrin using chen’s soft cutting technique. raw and surface modified multi-walled carbon nanotubes were observed by transmission electron microscope (tem). the results showed that chitosan and β-cyclodextrin could attach to the outer surface of nanotubes, wrapping the nanotub...

In this paper, a new type of steel-concrete composite member, concrete-filled core steel tube with outer angle steel plank reinforced concrete stub column, is proposed and a series of nonlinear 3D(three-dimensional) full-range numerical calculations under axial compression are carried out, some important factors are analyzed, such as the strength of the concrete, the steel tube and the angle st...

Hollow-dependent fauna are declining worldwide, due primarily to the widespread clearing of hollow-bearing trees. Artificial cavities such as timber and plywood boxes commonly used increase hollow availability, yet there is increasing evidence that they poor facsimiles natural cavities, characterized by lower insulative properties a shorter field life. We evaluated whether plastic materials cou...

This paper presents the details of a numerical study aimed at investigating fire performance carbon-fiber-reinforced polymer (CFRP)-strengthened short square hollow section (SHS) steel columns with and without an insulation system. Steady- transient-state finite-element (FE) models were developed to simulate behavior CFRP-strengthened exposed uniform elevated temperatures insulated standard con...

In order to study the hysteretic behavior and restoring force model of cold-formed thin-walled steel (CFTWS) lipped channel beam-column, a finite element analysis (FEA) considering material geometric nonlinearity influence initial imperfection under cyclic loading was established by ABAQUS software. Based on verified FEA model, CFTWS beam-column members with different influencing factors analyz...

In Japan, steel moment frames comprising H-shaped beams and square hollow-section columns with through diaphragms are often used for low- to middle-rise building structures. The column overdesign factor—strength ratio between beams—is specified as ≥1.5 in Japanese seismic design code ensure adequate energy absorption capacity against bidirectional ground motion by achieving an entire beam-hingi...

Despite substantial progress in recent years to improve the design guidance for high strength steel (HSS) structural elements, this has mainly been ambient conditions with their fire response still need of further research. Accordingly, paper reports on an investigation into performance unprotected HSS hollow section columns fire. Finite element models made from square, circular and rectangular...

The concrete-filled double steel tube (CFDST) has been more and widely used in infrastructure due to its greater moment of inertia compared the ordinary (CFST). With increase collision accidents occurring recent years, research on CFDST under impact needs attention. To study dynamic responses columns lateral impact, finite element package ABAQUS was simulate force mid-span deflection column cou...