الفهرس 
IntroductionOnly 14 pages are availabe for public view
 |  | from | 183 |  |  |
| | | from | 183 | | |
Abstract
The use of advanced composite materials has been successfully applied worldwide for the repair and strengthening of RC structures owing to their superior characteristics such as low unit weight, excellent corrosion resistance, high strength and ease of handling and application. However, the use of FRP for enhancing the punching shear resistance of RC elements has not yet been successful. This is attested to by the lack of provisions for the use of FRP for such applications in the internationally available codes and guidelines. The main objective of this work is to present innovative techniques utilizing hybrid FRP systems for increasing the ultimate punching shear resistance of reinforced concrete salb-colum. Thus introducing a role for the new FRP rechnologies when employed in this area. The hybrid system comprises a combination of FRP material and prefabricated elements connected to the column to form an integrated system capable of enhancing the punching shear resistance of the structure.
The innovative FRP hybird systems were analyzed using a nonlinear finite element software package ANSYS . In addition, an extensive experimental program was carried out for a variety of cases. The results obtained demonstrated the very high efficiency of the proposed systems. The results show good agreement between experimental and theoretical analyses. The results also show that higher values for punching shear enhancement could be achieved depending on the design parameters of the strengthening systems. The magnitude of the increase in the punching shear resistance reveal that both experimental and theroetical analyses. In this regard, the proposed systems are considered to be new innovative techniques for punching shear enhancement which may lead the way to successful applications utilizing FRP. Conclusion draw demonstrate the capability and efficiency of the proposed systems along with semi-empirical for the design of the strengthening systems in addition to recommendations for future research work.