Stitching of T-deep beams with large openings by CFRP sheets and NSM steel bars

Shakir, Qasim M. and Yahya, Yahya M. (2024) Stitching of T-deep beams with large openings by CFRP sheets and NSM steel bars. POLLACK PERIODICA : AN INTERNATIONAL JOURNAL FOR ENGINEERING AND INFORMATION SCIENCES, 19 (3). pp. 58-65. ISSN 1788-1994 (print); 1788-3911 (online)

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Abstract

In the present study, a comparison has been conducted to investigate the efficiency of stitching using the near-surface mounted steel bars and externally bonded carbon fibers reinforced polymers technique for strengthening the T-deep beams having large opening within the shear spans and with deficient shear reinforcement. Eight specimens with two locations of openings were tested. It was found that stitching of beams by steel bars with openings located flush to the flange yielded improvement in capacity in range (10–39%). Furthermore, Stitching by external bonded carbon sheets yield enhancements in capacity was 96 and 78% for the top location compared to the control specimen and the vertical near-surface mounted stirrups system. The respective values for the bottom location were 62 and 42% respectively.

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