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AN ANCHORAGE TECHNIQUE FOR FLEXURAL STRENGTHENING OF RC BEAMS USING NSM BFRP BARS

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Last updated: 13 Dec 2022

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Near-surface mounted (NSM) fiber reinforced polymer (FRP) bars are bec…s related works indicated that failure of the NSM FRP-strengthened be
embedded through-section (ETS) end anchorage technique is introduced t…s. The ETS end anchorage technique was manually developed by forming
whereas the remaining two specimens were strengthened utilizing NSM BF…. The beams were subjected to a four-point bending test until failure
and the results were evaluated. The experimental results revealed that…city and post-yield stiffness of NSM BFRP-strengthened beams. Moreove
ETS end anchorage achieved 90% of the ultimate tensile capacity of the…d a significant impact on the load capacity of the strengthened beams
AN ANCHORAGE TECHNIQUE FOR FLEXURAL STRENGTHENING OF RC BEAMS USING NSM BFRP BARS
ICASGE'23

Abstract

Near-surface mounted (NSM) fiber reinforced polymer (FRP) bars are becoming increasingly effective in strengthening and upgrading reinforced concrete (RC) beams. Most of the previous related works indicated that failure of the NSM FRP-strengthened beam was due to premature debonding failure. In this study, embedded through-section (ETS) end anchorage technique is introduced to increase the flexural capacity of RC beams strengthened with NSM basalt fiberreinforced polymer (BFRP) bars. The ETS end anchorage technique was manually developed by forming a bent part with angle 45o at the ends of basalt FRP bars using BFRP bars and sheet. Five RC rectangular beams were prepared and tested. One specimen was kept as an unstrengthened beam as a reference. Two specimens were strengthened with NSM BFRP bars using ETS end anchorage, whereas the remaining two specimens were strengthened utilizing NSM BFRP bars without anchorages. The axial stiffness of BFRP bars was kept constant for all strengthened beams. The beams were subjected to a four-point bending test until failure, and the results were evaluated. The experimental results revealed that using the proposed nonmechanical anchor significantly enhance the flexural capacity and post-yield stiffness of NSM BFRP-strengthened beams. Moreover, ETS end anchorage achieved 90% of the ultimate tensile capacity of the BFRP bars. The surface area of BFRP reinforcement and the number of the end anchorages had a significant impact on the load capacity of the strengthened beams

Keywords

Near-surface mounted (NSM) fiber reinforced polymer (FRP) bars are becoming increasingly effective in strengthening and upgrading reinforced concrete (RC) beams. Most of the previous related works indicated that failure of the NSM FRP-strengthened be, embedded through-section (ETS) end anchorage technique is introduced to increase the flexural capacity of RC beams strengthened with NSM basalt fiberreinforced polymer (BFRP) bars. The ETS end anchorage technique was manually developed by forming a, whereas the remaining two specimens were strengthened utilizing NSM BFRP bars without anchorages. The axial stiffness of BFRP bars was kept constant for all strengthened beams. The beams were subjected to a four-point bending test until failure, and the results were evaluated. The experimental results revealed that using the proposed nonmechanical anchor significantly enhance the flexural capacity and post-yield stiffness of NSM BFRP-strengthened beams. Moreover, ETS end anchorage achieved 90% of the ultimate tensile capacity of the BFRP bars. The surface area of BFRP reinforcement and the number of the end anchorages had a significant impact on the load capacity of the strengthened beams

Authors

First Name

Hesham

Last Name

M. Diab

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Volume

ICASGE2021

Issue Date

1 Jan 2021

Publish Date

29 May 2022

Link

https://icasge.conferences.ekb.eg/article_1577.html

Order

306

Publication Type

Conference

Publication Title

ICASGE'23

Publication Link

https://icasge.conferences.ekb.eg/

Details

Type

Article

Locale

en

Created At

13 Dec 2022