EXPERIMENTAL ANALYSIS OF THE SIMPLE BENDING STRENGTH OF COMPOSITE STEEL BEAMS OF ROLLED PROFILES WITH SCREWED SPLICE

Welington Vital da Silva, Ronivon Soares Pereira, Cleirton A. Silva Freitas, Valdeir F. de Paula

Abstract: In the construction of any type of building it is necessary to use the connection between the elements, so that the structural engineers make several checks so that there is no collapse in this union. In this sense, this paper presents the experimental study of support capacity of beams supported by steel profiles of laminated section I of type W 250 x 22.3. The profile studied complies with ASTM A572 grade 50 laminated on parallel guides with two symmetry axes. Thus, seven prototypes with different screw points were developed along the metal profile. The seven beams were tested with a length of 3000 mm, with a reference beam. In the remaining six beams changes were made in different positions, varying the number of bolted connections. In addition, a numerical model was developed through the ABAQUS CAE commercial program using the arc length formulation implemented in the program named Riks, the results of the numerical model obtained results close to the experimental one with a 6% error. In which the beams used were the same as those foreseen in this work, but with ASTM A325 and the screw diameter of 19 mm. All models were subjected to simple tensile stress at rupture, where vertical displacements were measured relative to displacements and specific twist deformations of the steel. The bonding bundles withstood the simple bending tests, without the rupture of the high strength bolts. The main contribution of this work was to show that the beams with bolted connections with the specifications described in this work can be used as structural elements, as well as withstand the required design.

Keywords: Beam, Steel, Screw Connections, Laminate, Profile, Single-Fold

DOI: https://doi.org/10.15623/ijret.2018.0708001