Performance of quadrilateral perforated prestressed concrete rafters

This study focuses on the behavior of simply supported perforated prestressed concrete rafters (PPCRs) under single midspan monotonic static loading. The experimental program consists of testing seven specimens, one solid (control) rafter, and six perforated quadrilateral openings. The main investig...

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Bibliographic Details
Published in:	Maǧallaẗ al-abḥath al-handasiyyaẗ Vol. 11; no. 1 B; pp. 26 - 37
Main Authors:	Izzat, Amir Faruq, al-Khafaji, Falah J., Oukaili, Nazar K.
Format:	Journal Article
Language:	English
Published:	Kuwait Kuwait University, Academic Publication Council 01-03-2023
Online Access:	Get full text
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Summary:	This study focuses on the behavior of simply supported perforated prestressed concrete rafters (PPCRs) under single midspan monotonic static loading. The experimental program consists of testing seven specimens, one solid (control) rafter, and six perforated quadrilateral openings. The main investigated variables are the number and height of the openings. The test findings indicate that, in comparison to the solid rafter, the presence of quadrilateral openings in the PPCRs led to reducing the load capacity by (4.3-36%) and increasing the midspan deflection at ultimate by (14.8-33%). Also, increasing the number of concrete posts between openings resulted in increasing the failure load and decreasing the deflection at all stages of performance of the prestressed concrete rafter. On the other hand, decreasing the depth of the upper and lower chords by 25% for PPCRs with the same number of openings led to a reduction in the failure load by 36, 29.5, and 24.5% for rafters with 6, 8, and 10 openings, respectively.
ISSN:	2307-1877 2307-1885
DOI:	10.36909/jer.11561