Deformability of non-prismatic prestressed concrete beams with multiple openings of different configurations

Amjad Majeed Al-Hilali; Amer Farouk Izzet; Nazar K. Oukaili

doi:https://doi.org/10.1515/jmbm-2022-0013

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Publication Date

Sat Jan 01 2022

Journal Name

Journal Of The Mechanical Behavior Of Materials

Volume

31

DOI

https://doi.org/10.1515/jmbm-2022-0013

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Deformability of non-prismatic prestressed concrete beams with multiple openings of different configurations

Amjad Majeed Al-Hilali

Amer Farouk Izzet

Nazar K. Oukaili

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Abstract<p>This work presents experimental research using draped prestressed steel strands to improve the load-carrying capacity of prestressed concrete non-prismatic beams with multiple openings of various designs. The short-term deflection of non-prismatic prestressed concrete beams (NPCBs) flexural members under static loading were used to evaluate this improvement. Six simply supported (NPCBs) beams, five beams with openings, and one solid specimen used as a reference beam were all tested as part of the experiment. All of the beams were subjected to a monotonic midpoint load test. The configuration of the opening (quadrilateral or circular), as well as the depth of the chords, were the variables studied in this study. In comparison to a solid beam, experimental results show that beams with openings have a lower load-carrying capacity not exceeding (2.3–10.6%) and higher mid-span deflection through all loading stages of elastic, service, and ultimate loads (14–73%), (19–44%), and (31–55%), respectively. Furthermore, specimens with circular openings had stiffer behaviour under load than those with quadrilateral openings. Beams with quadrilateral openings and inclined posts, on the other hand, were stiffer than beams with quadrilateral openings and vertical posts.</p>

Publication Date

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Journal Name

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