الفهرس 
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Abstract
As a continuation to a research program that have been undertaken at the
department of structural engineering of the University of Alexandria for studying the
strength and behavior of reinforced concrete slab-column connections, a total of twenty
specimens have were tested to failure. Fourteen of these specimens were for the study
of slab-edge column connections with spandrel beams. The other six specimens were
for the study of slab-interior column connections. The experimental work that has been
performed for this investigation is explained in detail. This includes specimen details,
materials used and fabrication of specimens, instrumentation, loading system, and testing
procedure. Behavior of the tested specimens during loading stages is described and test
results are reported.
The aim of this work was to study experimentally the effect of certain
parameters on the strength and behavior of the two types of connections and to
develope a method for predicting their strength.
The experimental study conducted on the edge-connection specimens indicated
that the behavior and strength of an edge connection are influenced by the presence and
dimensions of a spandrel .beam, its torsion strength, the ratio of the slab tension
reinforcement around the column placed normal to the spandrel beam, the ratio of the
moment to the axial load that are applied onto the connection, and by the presence of
openings next to column corners.
The experimental study conducted on the interior column slab-connection
specimens demonstrated that the behavior and strength of an interior connection are greatly influenced by the aspect ratio of the column cross section, the ratio of the column
side to the slab effective depth, the moment to axial load ratio applied to the column
stub, and the presence of openings next to the column corners.
Based on the observed mechanism offailure, an equilibrium method is presented
for predicting the ultimate capacity of a slab-edge column connection with a spandrel
beam. The method takes into account the interaction between the moment and the axial
load acting on the connection. When compared against tests the method has been found
to be satisfactorily correlating the test results.
As to interior connections, an eccentric shear stress model is proposed for
predicting the strength of interior connections transferring shear force and moment
between column stub and slab. The method adopts a critical section that is based on the
observed mode of failure of the tested specimens in the present investigation When
checked against tests, the method demonstrated satisfactory correlation between the
predicted values and the test results.