Retrofitting of box section concrete beams to resist shear and torsion using Near-Surface-Mount (NSM) GFRP Stirrups
There are a few kinds of research about box section Reinforced Concrete (RC) beams under the effect of combined shear and torsional stresses. In the present research, the concept of adding external strengthening, in the transverse direction, is adopted. The paper focuses on using Glass Fiber Reinfor...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Gruppo Italiano Frattura
2024-01-01
|
| Series: | Fracture and Structural Integrity |
| Subjects: | |
| Online Access: | https://www.fracturae.com/index.php/fis/article/view/4532/3941 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832568697000034304 |
|---|---|
| author | Moaz A. Nasser Ahmed A. Mahmoud Tarek S. Mustafa Ahmed N. M. Khater |
| author_facet | Moaz A. Nasser Ahmed A. Mahmoud Tarek S. Mustafa Ahmed N. M. Khater |
| author_sort | Moaz A. Nasser |
| collection | DOAJ |
| description | There are a few kinds of research about box section Reinforced Concrete (RC) beams under the effect of combined shear and torsional stresses. In the present research, the concept of adding external strengthening, in the transverse direction, is adopted. The paper focuses on using Glass Fiber Reinforced Polymer GFRP ropes as near-surface mount stirrups. Nine box-section concrete specimens were decanted and tested. Three variables are adopted, (1) GFRP stirrups diameter, (2) GFRP stirrups inclination, and (3) GFRP stirrups spacing. The experimental results showed considerable enhancement in the shear capacity of the strengthened beams by 8 to 56% depending on the effectiveness of the studied parameters. Ductility and toughness were improved when more intensive strengthening schemes were adopted. The shear capacity of all tested beams based on Egyptian code ECP 208�2019 is calculated and compared with that from American code ACI 440�2019 and Canadian code CSA-A23.3-04. The shear capacity from both Egyptian and American codes compared with experimental loads. The analytical results are conservative in some cases and unconservative in others while the analytical results in general are conservative. The Canadian code CSA-A23.3-04 is unconservative compared to the experimental results for the range of the studied parameters and specimens. |
| format | Article |
| id | doaj-art-32bdbdc9e54445baa071e8b48aa475ba |
| institution | Kabale University |
| issn | 1971-8993 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-32bdbdc9e54445baa071e8b48aa475ba2025-02-03T00:39:27ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89932024-01-01186731933610.3221/IGF-ESIS.67.2310.3221/IGF-ESIS.67.23Retrofitting of box section concrete beams to resist shear and torsion using Near-Surface-Mount (NSM) GFRP StirrupsMoaz A. NasserAhmed A. MahmoudTarek S. MustafaAhmed N. M. KhaterThere are a few kinds of research about box section Reinforced Concrete (RC) beams under the effect of combined shear and torsional stresses. In the present research, the concept of adding external strengthening, in the transverse direction, is adopted. The paper focuses on using Glass Fiber Reinforced Polymer GFRP ropes as near-surface mount stirrups. Nine box-section concrete specimens were decanted and tested. Three variables are adopted, (1) GFRP stirrups diameter, (2) GFRP stirrups inclination, and (3) GFRP stirrups spacing. The experimental results showed considerable enhancement in the shear capacity of the strengthened beams by 8 to 56% depending on the effectiveness of the studied parameters. Ductility and toughness were improved when more intensive strengthening schemes were adopted. The shear capacity of all tested beams based on Egyptian code ECP 208�2019 is calculated and compared with that from American code ACI 440�2019 and Canadian code CSA-A23.3-04. The shear capacity from both Egyptian and American codes compared with experimental loads. The analytical results are conservative in some cases and unconservative in others while the analytical results in general are conservative. The Canadian code CSA-A23.3-04 is unconservative compared to the experimental results for the range of the studied parameters and specimens.https://www.fracturae.com/index.php/fis/article/view/4532/3941experimentalanalyticalreinforced concrete box section beamsnear-surface mount (nsm)retrofittingshear and torsionglass- fiber-reinforced polymer (gfrp) |
| spellingShingle | Moaz A. Nasser Ahmed A. Mahmoud Tarek S. Mustafa Ahmed N. M. Khater Retrofitting of box section concrete beams to resist shear and torsion using Near-Surface-Mount (NSM) GFRP Stirrups Fracture and Structural Integrity experimental analytical reinforced concrete box section beams near-surface mount (nsm) retrofitting shear and torsion glass- fiber-reinforced polymer (gfrp) |
| title | Retrofitting of box section concrete beams to resist shear and torsion using Near-Surface-Mount (NSM) GFRP Stirrups |
| title_full | Retrofitting of box section concrete beams to resist shear and torsion using Near-Surface-Mount (NSM) GFRP Stirrups |
| title_fullStr | Retrofitting of box section concrete beams to resist shear and torsion using Near-Surface-Mount (NSM) GFRP Stirrups |
| title_full_unstemmed | Retrofitting of box section concrete beams to resist shear and torsion using Near-Surface-Mount (NSM) GFRP Stirrups |
| title_short | Retrofitting of box section concrete beams to resist shear and torsion using Near-Surface-Mount (NSM) GFRP Stirrups |
| title_sort | retrofitting of box section concrete beams to resist shear and torsion using near surface mount nsm gfrp stirrups |
| topic | experimental analytical reinforced concrete box section beams near-surface mount (nsm) retrofitting shear and torsion glass- fiber-reinforced polymer (gfrp) |
| url | https://www.fracturae.com/index.php/fis/article/view/4532/3941 |
| work_keys_str_mv | AT moazanasser retrofittingofboxsectionconcretebeamstoresistshearandtorsionusingnearsurfacemountnsmgfrpstirrups AT ahmedamahmoud retrofittingofboxsectionconcretebeamstoresistshearandtorsionusingnearsurfacemountnsmgfrpstirrups AT tareksmustafa retrofittingofboxsectionconcretebeamstoresistshearandtorsionusingnearsurfacemountnsmgfrpstirrups AT ahmednmkhater retrofittingofboxsectionconcretebeamstoresistshearandtorsionusingnearsurfacemountnsmgfrpstirrups |