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The aim of this research is to investigate experimentally the effect of adding shear connectors to the composite deck slabs which have various geometries of steel sheeting. The behavior and resistance of composite slab is basically depending on the development of longitudinal shear resistance. In this study six specimens of composite deck slabs which have different types of geometries of steel sheets (trapezoidal, triangle and T-shapes) with dimensions (1850mm x 500mm x 110mm) were casted and tested under four-point load in presence and absence of shear connectors in order to evaluate the behavior and longitudinal shear resistance of composite slabs. The results show that the adding shear connectors to composite slabs with trapezoidal shape and triangle shape act to increase ultimate load capacity by 22.2% and 17.8% respectively as compared with composite slabs without shear connectors while effect of adding shear connectors to the composite slab with T-shape was very little or can be neglected. As well as the adding shear connectors to composite slabs with trapezoidal shape and triangle shape act to decreasing the deflection as compared with the same load also act to enhance the general performance of slabs. Conclusion From the results of the tested composite slabs specimens, the following conclusions can be drawn: - The presence shear connectors in composite slabs with trapezoidal shape and triangle shape act to increase ultimate load capacity by (22.2% and 17.8%) respectively as compared with composite slabs without shear connectors while the effect of adding shear connectors to the composite slab with T-shape was very little or can be neglected. The adding shear connectors to the composite slabs with trapezoidal shape and triangle shape lead to decrease the deflection after slip happened as compared with the same load while the deflection in the composite slabs with T-shape was approximately same in presence and absence of shear connectors. The development of strain in composite slabs with trapezoidal shape and triangle shape in presence shear connectors were more than absence of shear connectors while the ultimate strain in composite slab with T-shape was approximate same in presence and absence of shear connectors. The adding shear connectors to composite slabs in specimens with trapezoidal shape and triangle shape act to development of maximum end slip to 6.404mm and 10mm respectively while the slip in specimens with T-shape was zero in all the stage o loading. The composite slabs which have Triangle shape failed by flexural failure and showed full interaction whereas the composite slabs which have trapezoidal shape and triangle shape failed by horizontal shear failure and showed partial interaction.

This paper presents the behavior of composite slabs with different geometry of profile steel sheet where the strength of composite deck slab mainly depending on the composite action and strength of the connection between concrete and profile steel sheet. In this study, three full-scale specimens of composite slabs with different types of geometry of profile steel sheets (T-shape, triangle shape and trapezoidal shape) were cast and tested under two-point load in order to evaluate the structural behavior and shear bond of composite slabs. The results show that geometry of profile steel sheet have significantly effect on the behavior and strength of composite slab where the ultimate load increased by (32% and 133%) in composite slabs with (triangle shape and T-shape) respectively as compared with trapezoidal shape. As well as the results were satisfy in term of deflection, horizontal end slip, strain and mode of failure.

The accumulation of rubber tires poses a great danger to the environment, especially since the number of cars is constantly increasing. Therefore, at the beginning work was done to recycle these tires and use them as an alternative to the natural aggregate used in concrete. It was also used in asphalt used in roads. Packaging for the Shear Connecter used in composite section. As this work gave excellent results in reducing the hardness of the shaker contactor, increasing its durability and resistance, and also preserving it from corrosion by rust. Waste rubber was also used to covering the bolts used to connect the beam with the column in steel structures. Where the presence of rubber gave a high ability to dissipate energy when the steel structure is subjected to a seismic load. It also worked to increase the displacement and increase the durability of the steel structure and also reduce the friction between the bolts and their holes. The presence of rubber around the bolt also delayed the failure time of the steel structure and thus the important aim of the research work has been achieved, which is to maintain the safety of people when the structure is exposed to an earthquake load.