Solid and Hollow Pre-Tensioned, Pre-Stressed Concrete Orchard Posts—Computational and Experimental Comparative Analysis.
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| Title: | Solid and Hollow Pre-Tensioned, Pre-Stressed Concrete Orchard Posts—Computational and Experimental Comparative Analysis. |
|---|---|
| Authors: | Michałek, Jarosław1 (AUTHOR) jaroslaw.michalek@pwr.edu.pl, Dudkiewicz, Jacek1 (AUTHOR) |
| Source: | Materials (1996-1944). Jun2025, Vol. 18 Issue 11, p2525. 15p. |
| Subjects: | Mass production, Concrete testing, Civil engineers, Civil engineering, Tree branches |
| Abstract: | For several years now, fruit-growers have increasingly often used pre-tensioned, pre-stressed concrete posts for supporting branches of fruit trees and suspending protective nets in order to limit damage to fruits caused by hail, wind, snow, heavy rainfall, insects and birds. Pre-tensioned, pre-stressed concrete posts most often have a trapezoidal cross-section, which is ideally suitable for mass production in a self-supporting non-dismantlable steel mould on a pre-stressing bed. Posts with 70 mm × 75 mm, 80 mm × 85 mm and 90 mm × 95 mm cross-sections are typically produced, whereas 100 mm × 120 mm and 130 mm × 140 mm posts are manufactured to order. Furthermore, it is proposed to produce hollow posts. Such posts are lighter than solid posts, but they require a more complicated production technology. This paper presents selected parts of a comparative computational–experimental analysis of solid and hollow posts. In the Building Structures Laboratory in the Building Structures Department at the Civil Engineering Faculty of the Wrocław University of Science and Technology, experimental tests of pre-stressed concrete orchard posts of 70 mm × 75 mm and 90 mm × 95 mm with solid and hollow cross-sections were carried out on a full scale. The theoretical analysis and research has shown that the resistance to bending, cracking resistance and rigidity of hollow posts (with their cross-sectional outline unchanged) will not significantly differ from those of the currently produced solid posts. At same time, material savings will be achieved. Therefore, the main task is to master the continuous moulding of hollow posts from dense plastic concrete with the simultaneous pulling out of the cores, producing longitudinal hollows in the posts. [ABSTRACT FROM AUTHOR] |
| Copyright of Materials (1996-1944) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 185869687 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Solid and Hollow Pre-Tensioned, Pre-Stressed Concrete Orchard Posts—Computational and Experimental Comparative Analysis. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Michałek%2C+Jarosław%22">Michałek, Jarosław</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> jaroslaw.michalek@pwr.edu.pl</i><br /><searchLink fieldCode="AR" term="%22Dudkiewicz%2C+Jacek%22">Dudkiewicz, Jacek</searchLink><relatesTo>1</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Materials+%281996-1944%29%22">Materials (1996-1944)</searchLink>. Jun2025, Vol. 18 Issue 11, p2525. 15p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Mass+production%22">Mass production</searchLink><br /><searchLink fieldCode="DE" term="%22Concrete+testing%22">Concrete testing</searchLink><br /><searchLink fieldCode="DE" term="%22Civil+engineers%22">Civil engineers</searchLink><br /><searchLink fieldCode="DE" term="%22Civil+engineering%22">Civil engineering</searchLink><br /><searchLink fieldCode="DE" term="%22Tree+branches%22">Tree branches</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: For several years now, fruit-growers have increasingly often used pre-tensioned, pre-stressed concrete posts for supporting branches of fruit trees and suspending protective nets in order to limit damage to fruits caused by hail, wind, snow, heavy rainfall, insects and birds. Pre-tensioned, pre-stressed concrete posts most often have a trapezoidal cross-section, which is ideally suitable for mass production in a self-supporting non-dismantlable steel mould on a pre-stressing bed. Posts with 70 mm × 75 mm, 80 mm × 85 mm and 90 mm × 95 mm cross-sections are typically produced, whereas 100 mm × 120 mm and 130 mm × 140 mm posts are manufactured to order. Furthermore, it is proposed to produce hollow posts. Such posts are lighter than solid posts, but they require a more complicated production technology. This paper presents selected parts of a comparative computational–experimental analysis of solid and hollow posts. In the Building Structures Laboratory in the Building Structures Department at the Civil Engineering Faculty of the Wrocław University of Science and Technology, experimental tests of pre-stressed concrete orchard posts of 70 mm × 75 mm and 90 mm × 95 mm with solid and hollow cross-sections were carried out on a full scale. The theoretical analysis and research has shown that the resistance to bending, cracking resistance and rigidity of hollow posts (with their cross-sectional outline unchanged) will not significantly differ from those of the currently produced solid posts. At same time, material savings will be achieved. Therefore, the main task is to master the continuous moulding of hollow posts from dense plastic concrete with the simultaneous pulling out of the cores, producing longitudinal hollows in the posts. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Materials (1996-1944) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.3390/ma18112525 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 15 StartPage: 2525 Subjects: – SubjectFull: Mass production Type: general – SubjectFull: Concrete testing Type: general – SubjectFull: Civil engineers Type: general – SubjectFull: Civil engineering Type: general – SubjectFull: Tree branches Type: general Titles: – TitleFull: Solid and Hollow Pre-Tensioned, Pre-Stressed Concrete Orchard Posts—Computational and Experimental Comparative Analysis. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Michałek, Jarosław – PersonEntity: Name: NameFull: Dudkiewicz, Jacek IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 06 Text: Jun2025 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 19961944 Numbering: – Type: volume Value: 18 – Type: issue Value: 11 Titles: – TitleFull: Materials (1996-1944) Type: main |
| ResultId | 1 |
