some considerable damage to steel structures during the hyogo-ken nanbu earthquake occurred. among them, many exposed-type column bases failed in several consistent patterns, such as brittle base plate fracture, excessive bolt elongation, unexpected early bolt failure, and inferior construction work, etc. the lessons from these phenomena led to the need for improved understanding of column base...

A sensitive and selective method has been developed for the determination of Mo in steel samples using a nanometre-sized titanium dioxide micro-column (20 mm 6 3.0 mm id) and inductively coupled plasma atomic emission spectrometry (ICP-AES). Under the optimized conditions (pH 1.0, flow rate 1.5 mL min), Mo was retained on the column and separated from the iron matrix, then eluted with 0.5 mol L...

Concrete-filled composite elements have recently gained popularity as beams and columns all over the world. They advantages similar to reinforced concrete elements, such moulding process lack of maintenance filled concrete, well hollow steel enhancing compressive strength bending capacity by using smaller sections. In this paper, buckling behaviour thin-walled with circular cross-section differ...

This study presents the optimal drift design method to control the elastic and inelastic performance of steel moment frames. This is formulated as a problem that minimizes the lateral displacement at the top of a building satisfying the constraints on the total structural weight and the column-to-beam strength ratios at the joints. This uses the resizing method based on the linear static analys...

An electric charge-tunable micro-column (CTMC) was developed as a precolumn for reversed-phase capillary chromatography using conductive carbon fibers as the stationary phase. The carbon fibers, which constitute one electrode, are packed into a heat-shrinkable tube, which is attached to a stainless-steel column body. The mobile phase flows into CTMC through a stainless-steel tube that acts as...

The behavior of steel structures subjected to seismic actions depends directly on the connections behavior. There are two current tendencies for ensuring the structural ductility: allowing the formation of plastic hinges in the beams by using reduced beam sections or reduced web sections or by ensuring the plastic hinge formation in the connection by using dissipative elements. This paper prese...

An efficient beam element, the modified elastofiber MEF element, has been developed to capture the overall features of the elastic and inelastic responses of slender columns and braces under axial cyclic loading without unduly heavy discretization. It consists of three fiber segments, two at the member ends and one at midspan, with two elastic segments sandwiched in between. The segments are de...

We have developed a method for forming carbon nanotubes (CNTs) directly on the surfaces of stainless steel materials that are important industrially. Using plasma-assisted chemical vapor deposition (PCVD), CNTs are formed at comparatively low temperatures, thus avoiding excessive annealing and degradation of the stainless steel. Because the catalytic metals needed for CNT formation are containe...