الفهرس 
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Abstract
The main objective of this thesis was to study the use of the ferrocement layers in the strengthening of post-opened high-strength concrete (HSC) deep beams. An experimental program was conducted on eight simply supported reinforced concrete deep beams. All tested beams had the same dimensions (150 mm x 800 mm x 1300 mm), concrete strength (74 N/mm2 ), ferrocement strength (64 N/mm2 ), the same longitudinal reinforcement ratio (μ= 1.00%), and the values of clear concrete cover kept constant as 25 mm. All beams were tested using four points loading until failure occurred. The main variables studied were: the usage of full or partial ferrocement layers, and. the effectiveness of adding shear connectors, steel wire mesh, and nearsurface mounted (NSM) steel bars in different configurations around the openings on both sides of the beam. Also, an analytical study, using the strut and tie method (STM) was extended to include the effect of the added ferrocement layers, and side steel reinforcements. Test results are presented and discussed. Some of the outcome conclusions were that the shear capacity was decreased by 31% due to the existence of the opening in the shear span and that installing the ferrocement layers without using shear connectors had little effect on the shear capacity. Adding shear connectors to the system regained the full capacity of the original beam. Also, the beam with partial layers showed few enhancements in the shear strength of about 12.5%. Finally, the analytical results obtained using STM were fairly close to those obtained from the experiments.