Steel beam cross sections are normally classified according to the effect of local buckling on the moment capacity of the section. This is achieved by defining slenderness limits for the flange and the web. This paper describes a series of bending tests on cold-formed RHS to examine these limits. The resulting experimental relationship between web slenderness and plastic rotation capacity is gi...

A result of the increased usage of advanced high strength steels (AHSS) for stamped automotive body structures is an increase in press forces and tool wear, as well as component geometrical issues, such as springback and curl. This study investigates a methodology of forming a dual-phase steel component in a ‘softened’, or annealed, condition, then subsequently heat-treating and quenching the c...

Angle sections are commonly designed to bear only axial force, usually neglecting the additional bending moments resulting from the eccentric connection and the shift of the effective centroid. The current work deals with the capacity of single-bolted equal angle sections made from cold-formed steel. The experimental investigation presented herein includes tension and compression tests that sub...

After Northridge (1994) and Kobe (1995) earthquakes, several studies have been conducted to improve the seismic performance of steel structures. In this investigation, new steel moment-resisting connections (FSFN) developed by the authors, were studied by the non-linear numerical analysis. These connections were single-sided beam-to-column assemblies that are representative of exterior beam-to-...

The purpose of this study was to determine the sealing quality of Super EBA cement in laser prepared root-end cavities in comparison with root-end cavities classically prepared with steel burrs. Two groups of three millimeter root sections were prepared. The first group was prepared with the Er:YAG laser and the second group with a steel burr mounted on a surgical handpiece. The sections were f...

The purpose of the study was to measure and compare the level of frictional resistance generated between conventional ceramic brackets (Transcend Series 6000, 3M Unitek, Monrovia, Calif), ceramic brackets with stainless steel slot (Clarity, 3M Unitek), conventional stainless steel brackets (Victory Series, 3M Unitek), and 3 different orthodontic wire alloys: stainless steel (stainless steel, SD...

Metal thin-walled members have been widely used in building industry. Usually they are utilized as purlins, girts or ceiling beams. Due to slenderness of thin-walled cross-sections these structural members are prone to stability problems (e.g. flexural buckling, lateral torsional buckling). If buckling is not constructionally prevented their resistance is limited by buckling strength. In practi...

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...

Due to complexities from the interaction between steel tube and concrete filling of concrete-filled tubular (CFST) columns, their strengths are very complicated, which is a highly nonlinear relation with material geometry. Categorical gradient Boosting (CatBoost), advanced boosting machine, presented solve problems. A total 3103 tests, divided in four datasets, trained tested learners determine...

Mnacho Echenim, Nicolas Peltier. Reasoning on Schemata of Formulæ. Johan Jeuring, John A. Campbell, Jacques Carette, Gabriel Dos Reis, Petr Sojka, Makarius Wenzel, Volker Sorge. AISC 2012 Artificial Intelligence and Symbolic Computation (Part of CICM 2012), Jul 2012, Bremen, Germany. Springer, 7362, pp.310-325, 2012, Lecture Notes in Computer Science (LNCS). <10.1007/978-3-642-31374-5 21>. <hal...