الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
 |  | from | 112 |  |  |
| | | from | 112 | | |
Abstract
In the last few decades, the scientific community has been extensively involved in the investigation about the interaction between infill masonry walls and R.C frames in the seismic structural behavior, both for new and for existing buildings. It is observed from many researches in experimental and analytical studies, that the presence of infill elements can reduce horizontal displacement and increase the overall resistance to horizontal loading. The purpose of this research is to study analytically by using finite element program package-SeismoStruct computer program of an advanced double-strut nonlinear cyclic model for masonry panels, the effect of infill on the response of R.C frames under different types of loading such as dynamic time history loading and static pushover loading. A summary of research work done by the others was conducted in literature review chapter clarifying the different case of infilled frame to study the global effect of infilled frame. The parametric study can be divided into two case studies. The first case study was performed on a 4-story, 3-bay plane RC frame. The frame was analyzed with 6 different infill wall applications by removing infills from one different story for each model. The frames were analyzed under nonlinear dynamic time history and static pushover analysis to sketch response curves, pushover curves to study the effect of irregularity on the performance of the frames when subject to lateral loading. The results of this case study show that uniform distribution of masonry infill panels increase base shear capacity 4.39 times of the bare frame and the top story displacement decreased 96.64%. The irregular distribution of masonry panels along frame height by removing infill panels from intermediate story causes a big discontinuity in terms of strength and stiffness and the base shear capacity decreased to a value varied from 1.35 to 3.47 time that of bare frame. The second case study is a 3-bay plane RC frame analyzed with different number of stories, 4, 10 and 15 stories. The frames were designed according to Egyptian code under gravity loads only and the frames do not meet the new code seismic design requirements. These frames were analyzed under static pushover analysis. The purpose of this case is to study the effect of infill panels on the base shear capacity of the frames with different height. The results of this case study show that base shear value increased in case of 4- story frame 5.2 times of bare frame. The value of maximum base shear of full infilled 10 and 15 story frames decreased about 5.37% and 20.1%, respectively.