Response Reduction Factor of RC framed structures with Semi-interlocked masonry and unreinforced masnory infill

Abstract

In building construction, RC Frame structures are frequently used due to ease of construction and rapid progress of work. Generally these frames are filled by masonry in fill panel. However, during past earthquakes it was found that the performance of such type of structures significantly depends on out-plane behavior of in fill panel wall. In this study two type of in fills are used i.e., unreinforced masonry in fill and semi-interlocked masonry in fill. For the analysis purpose of in fill, double struct nonlinear cyclic model is used. The main objective of the study is to investigate the importance of interlocked brick in fill in RC frame structure. For understanding the same, nonlinear static pushover analysis is carried out on analytical models using finite element analysis software, seismostruct. The R factor components such as ductility reduction factor and over strength factors were computed from nonlinear static pushover analysis and finally response reduction factor is calculated for all models. In this work, primary focus is given to numerical modeling and nonlinear behavior of brick masonry buildings subjected to lateral loads & calculation response reduction factor of RC in filled frame.