On the Influence of Steel Geometry on the Induced Currents in Steel Reinforced Concrete Building due to a Nearby Lightning Strike to Ground

In this paper, a study is carried out to determine the magnitude and nature of the induced currents in the steel structure of a steel reinforced concrete building due to a nearby lightning strike to ground. The influence of various parameters of steel geometry of a building on the induced currents is investigated. Electromagnetic model is employed for the study and numerical electromagnetic code 2 is used for the numerical field computations. The time-domain quantities are obtained using appropriate Fourier and inverse Fourier transform techniques in MATLAB. It is observed that the height of the building and increased number of rods in the columns and beams have an effect to increase the peak value of the induced currents. It is also observed that the roof in the building has the shielding effect to reduce the peak value of the induced current. The diameters of the rods and material used have no significant influence on the magnitude and nature of the induced currents.