Experimental and Numerical Prediction of Torsional Behavior of Steel Beam with Sinusoidal Web
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RESEARCH PAPER
Experimental and Numerical Prediction of Torsional Behavior of Steel Beam with Sinusoidal Web Mahyar Maali1 Received: 4 February 2019 / Accepted: 23 August 2019 © Shiraz University 2019
Abstract This study is concerned with the torsional behavior of I-beams with sinusoidal corrugated web. A compact-type numerical and experimental program was planned to observe pure torsion. This type of beam is quite important for the building design and construction. Specifically, the torsional behavior mentioned throughout this paper is a significant aspect to investigate the overall mechanical properties. The torsion load and rotation capability of experimental and finite element models were investigated for the I-sinus-shaped steel beams. The torsion load of elastic torsion compared to plastic torsion is approximately 76.77%, 86.46%, 83.50% and 78.11% for the Ex-Simple, Ex-sinus 30°, Ex-sinus 70° and Ex-IPE160, respectively. The increased rotation of elastic torsion compared to plastic torsion is approximately 45.12%, 40%, 50.55% and 38% for Ex-Simple, Ex-sinus 30°, Ex-sinus 70° and Ex-IPE160, respectively. Keywords Sinus-shaped · Steel beams · Finite element models · Experimental models · Maximum torsion load
1 Introduction The I-shaped steel beams are extensively used in steel structures, for which it is very important to design the I-beams with optimum dimensions and low weight. A new type of steel I-profile with sinusoidal corrugated web is proposed for this study to design more economical buildings. A sinusoidal beam profile is composed of a sinusoidal web plate and two flanges that are connected with the plate. It is considered to optimize the dimensions of bearing elements and to provide low weight in the engineering design. Therefore, studies which tried to provide optimum dimensions and low weight have increased in recent years. Thin-walled steel beams can be designed with a variety of properties to lend to different performance requirements, which typically include ductility, strength, corrosion resistance and weldability (De’nan et al. 2016). However, the steel beams are generally not resistant to torsion, and the interaction effects because of torsional behavior as well as bending behavior can dramatically decrease the usability of steel beams in buildings. The shear and bending actions develop warping and torsion, in * Mahyar Maali [email protected] 1
Department of Civil Engineering, Faculty of Engineering, Ataturk University, 25030 Erzurum, Turkey
an I-type profile, which the flanges and the web resist torsion and warping in a combined way (Trahair and Pi 1997). Since little has been reported on such built-up I-beams in the literature, it is necessary to investigate the structural behavior of the sinusoidal built-up I-sections. Moon et al. (2009) investigated shear resistance, interactive shear buckling and lateral-torsional buckling behavior in trapezoidal corrugated web steel beams (Ding et al. 2012). A prestressing box girder with steel corrugated webs is modeled to determine the t
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