Xperimental Studies on Characterising Of Aseismic Performance of Reinforced Concrete Frames

Abstract

A few research works have been carried out for the past two decades, so I took research in advanced side. The basic investigation under dynamic loads starts with the estimation of the natural frequencies of the structure or system under consideration. This is an important parameter under dynamic analysis. Hence a detailed study has been carried out on the influence of un-reinforced masonry infill (masonry infill) on fundamental natural frequency of Reinforced Concrete (RC) frames. Masonry infill though considered as non-structural element largely effect the strength, stiffness and ductility of the framed structure during the application of lateral loads such as wind and earthquake loads. Experimental and numerical studies are carried out on 2D and 3D RC frames under different configurations of masonry infill in addition to bare frames. The RC frames are designed and detailed as per the relevant Indian standard codes. A simple numerical method has been formulated to obtain the natural frequencies of RC frames with masonry infill in the FE analysis. Tri-axial shake table is used for the determination of natural frequencies experimentally. These results are compared with the empirical formulae given in national and international codes for finding the natural frequencies. This research program is a part of the project sanctioned by Ministry of Earth Sciences, Government of India and investigation on 2D frames is carried out at Central Power Research Institute, Bengaluru and at Adhiyamaan College of Engineering, Hosur, focusing on the Response evaluation of RC frames under dynamic loading. This dissertation report consists of design and construction of RC frames, numerical formulation, FE analysis, Shake table tests and comparison of national and international codes.