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Volume Title: ICASGE2017

DOI: ICASGE-RCS

Heba Ali Abdel Rahman

Generally reinforced concrete grade beams are analyzed to support ground floor block walls and to resist limited differential settlement of connected isolated footings. Thus, their contribution to load transfer to soil is ignored. The effect of infill wall between grade beams of the structure is rarely taken into consideration. Analysis and design in this way underestimate actual efficiency of grade beams. In actual condition the structure is generally supported on compressible soil mass and soil-grade beam interface is present. There exits interaction between structure and soil mass below foundation. The flexibility of foundation, and the compressibility of soil mass stiffness of infilled panel formed by upper and lower grade beams, and other factors play an important role in the redistribution of moments and shear forces in the superstructure. Present work is to study behavior of in-filled frame having soil beneath and consisting of foundations pads, columns and grade beams at two levels. This paper presents finite element analysis of brickwork infilling plane frames subjected to gravity loads of different distribution. The distributions include uniform load, two middle third concentrated loads and mid- span concentrated load . The analytical models utilize 3 – D (SEISMOSTRUCT) software. The analyses consider the non – linear behavior of concrete and masonry. Accounting for the effect of vertical load distribution is allowed for this models. Eighteen models have been analyzed to study the effect of infill between grade beams, the relative quality of the infill, and the load pattern in on structural behavior .

concrete; Reinforced; Infilled; Frame; Soil; Interface; Grade Beams