Modal Analysis of RC Masonry Infill Model and Prototype Frames with Openings

Abstract

Modal evaluation is the technique of figuring out the inherent dynamic traits of the shape in phrases of herbal frequencies and mode shapes and the usage of them to create a mathematical version for its dynamic behavior. The dynamics of a structure is defined by frequency and position. Modal evaluation offers the records regarding to exceptional modes of vibration, exceptional form that may be taken up via way of means of the shape at some stage in vibration. These shapes during different modes are called mode shapes and all mode shapes have their corresponding natural frequencies. In this study, modal analysis on 3D-RC Masonry Infill (MI) Model and Prototype frames with openings are carried out. MI is modeled as equivalent diagonal strut which is a macro modeling technique as per the formulation from IS 1893 (part-1):2016. The natural frequencies obtained from modal analysis are compared with the time period formula from IS 1893 (part-1):2016.

Keywords: Natural Frequency, Equivalent Diagonal Strut, Macro modeling, Scale factor, Mode Shapes