BEHAVIOR OF REINFORCED CONCRETE CONTINUOUS DEEP BEAMS WITH OPENINGS AND USING MULTIPLE TYPES OF STRENGTHING

Abstract

In this research, thirteen specimens of reinforced concrete continuous deep beams were cast and tested. One was the main reference without openings, three were a reference for each style depending on the arrangement of the openings, while the other nine were strengthen beams using NSM technology. Three models were used to implement the strengthening (horizontal, vertical and inclined). The results showed an increase in load capacity after applying strengthening to the specimens, as well as an improvement in stiffness and ductility. The specimens with inclined strengthening gave the highest increase in load capacity The increase rates ranged between (19%-30%), The specimens with horizontal strengthening gave an increase ranging between (7%-26%), The specimens with vertical strengthening also gave an increase ranging between (7%-22%).

Keywords

• strengthen
• near surface mounted
• deep beam
• failer mode
• crack patterns