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http://dx.doi.org/10.12989/eas.2017.13.6.589

Dynamic response of concrete beams reinforced by Fe2O3 nanoparticles subjected to magnetic field and earthquake load  

Mohammadian, Hossein (Department of Civil Engineering, Jasb Branch, Islamic Azad University)
Kolahchi, Reza (Department of Civil Engineering, Jasb Branch, Islamic Azad University)
Bidgoli, Mahmood Rabani (Department of Civil Engineering, Jasb Branch, Islamic Azad University)
Publication Information
Earthquakes and Structures / v.13, no.6, 2017 , pp. 589-598 More about this Journal
Abstract
In this paper, dynamic response of the horizontal concrete beam subjected to seismic ground excitation is investigated. The structure is reinforced by $Fe_2O_3$ nanoparticles which have the magnetic properties. The hyperbolic shear deformation beam theory (HSDBT) is used for mathematical modeling of the structure. Based on the Mori-Tanaka model, the effective material properties of concrete beam is calculated considering the agglomeration of $Fe_2O_3$ nanoparticles. Applying energy method and Hamilton's principle, the motion equations are derived. Harmonic differential quadrature method (HDQM) along with Newmark method is utilized for numerical solution of the motion equations. The effects of different parameters such as volume fraction and agglomeration of $Fe_2O_3$ nanoparticles, magnetic field, boundary conditions and geometrical parameters of concrete beam are studied on the dynamic response of the structure. In order to validation of this work, an exact solution is used for comparing the numerical and analytical results. The results indicated that applying magnetic field decreases the of the structure up to 54 percent. In addition, increase too much the magnetic field (Hx>5e8 A/m) does not considerable effect on the reduction of the maximum dynamic displacement.
Keywords
dynamic response; $Fe_2O_3$ nanoparticles; seismic ground excitation; HDQM; magnetic field;
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Times Cited By KSCI : 4  (Citation Analysis)
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