This paper presents the mechanical properties of high strength structural steel and mild structural steel at elevated temperatures. Mechanical properties of structural steel at elevated temperatures are important for fire resistant design of steel structures. However, current design standards for fire resistance of steel structures are mainly based on the investigation of hot-rolled carbon stee...

The majority of steel factory buildings constructed in 1960-70’s Japan do not display satisfactory seismic performance due to the lack strength brace-end joints or foundations. retrofit works that simply add lateral bracings would be undesirable because it prevent ordinary operations. Then, another approach could alternative by enhancing ductility each structural member. In this study, practica...

Nigeria is blessed with abundant iron ore deposits of nearly 3 billion tonnes and other basic minerals for steel production including coal and limestone. Yet the Nigerian steel sector has collapsed principally due to shortage of raw materials particularly iron ore for the integrated steel plants and billets for the rolling mills. The privatization of the steel sector that was done in 2004-2005 ...

In order to quantitatively evaluate the shear-bearing capacity of shear connectors of square concrete filled steel tube (CFST), push-out tests on 14 square CFSTs with shear connectors have been carried out. Among the 14 CFSTs, there are 13 specimens with steel plate connectors and one specimen with steel bar connectors. The following factors are investigated to figure out their influences on th...

Inibidores de corrosão são largamente utilizados na prevenção de corrosão em operações de estimulação em poços de petróleo. Investigações teóricas e experimentais detalhadas de vinte e três compostos incluindo aminas, derivados de tiouréia e álcoois acetilênicos foram realizadas para estimar a sua eficiência na inibição de corrosão do aço 22% Cr (de estrutura austeníticoferrítica; duplex) em so...

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...

Given the problems of serious asymmetric deformation and difficulty in supporting right-angled trapezoidal roadways during mining process, we established a mechanical model surrounding rock for roadway, determined relationship between deflection tilt angle roadway roof, that typical failure mode is upper slip high side. Two optimized support schemes are proposed, which constant resistance large...