الفهرس 
Seismic Performance Of Steel Frames With Masonry Infill
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Abstract
Using infill walls has a great effect on the strength and ductility of structures. This
research focuses on the assessment of the seismic behavior of multi-bay, multi-story
steel frames with masonry infill. A numerical model is used to study the problem,
considering the skeletal frame elements as well as the masonry infill. Different
parameters are investigated such as; the number of stories, span length, wall thickness,
compression strength and modulus of elasticity of infill walls. The effect of each
parameter on the strength, stiffness, and ductility of the structural system was assessed
with and without the infill. In addition, the presence of a ”soft story” at the ground floor
is investigated. Free vibration analysis is performed to identify the difference in the
fundamental period of vibration for the bare frames and the infill frames. Pushover
analysis is performed to study the effect of infill walls on the frames under lateral loads
beyond the elastic limit. The progress of plastic hinges and the ductility for the various
systems is outlined. Finally, time history analysis is performed and the results are
compared with pushover analysis. Based on the studies it may be conclude that using
infill walls increases the initial stiffness as well as the value of base shear. Increasing
the span length, the compression strength and thickness of infill walls results in an
increase in the base shear. Straining actions on first floor columns increases when soft
story is considered