STRENGTH PROPERTIES OF TRUSS ELEMENTS MADE OF ENVIRONMENTALLY-FRIENDLY STRUCTURAL LUMBER
Introduction: Softwood lumber is widely used to manufacture load-bearing structures. However, the quality of round wood used to manufacture such lumber has been deteriorating lately. Round wood decreases in diameter and often has heart rot. The article looks into the possibility of manufacturing ele...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Saint Petersburg State University of Architecture and Civil Engineering
2020-06-01
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| Series: | Architecture and Engineering |
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| Online Access: | https://aej.spbgasu.ru/index.php/AE/article/view/297/162 |
| _version_ | 1818136766310252544 |
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| author | Vladimir Melekhov Viktor Byzov Aleksandr Chernykh Shirali Mamedov |
| author_facet | Vladimir Melekhov Viktor Byzov Aleksandr Chernykh Shirali Mamedov |
| author_sort | Vladimir Melekhov |
| collection | DOAJ |
| description | Introduction: Softwood lumber is widely used to manufacture load-bearing structures. However, the quality of round wood used to manufacture such lumber has been deteriorating lately. Round wood decreases in diameter and often has heart rot. The article looks into the possibility of manufacturing elements of load-bearing structures using beams made of round wood of small diameter that have not been previously used to manufacture structural materials for construction purposes. It is suggested to make beams of such round wood preserving the trunk structure to the maximum (heartwood beams). Due to the preservation of the annual growth ring pattern, such beams have better strength properties as compared to traditional structural lumber. Purpose of the study: The study is aimed to determine the strength properties of engineering structures’ elements made of heartwood beams sawn from round wood of small diameter. Methods: The authors tested an experimental truss made of heartwood beams by means of incremental loading until destruction. Results: The strength properties of the truss elements made of heartwood beams sawn from round wood of small diameter were determined. There is a good fit between the calculated values of stress in the truss elements and the experimental data. The structure was damaged in the panel points connecting the compression strut with the elements of the tension and compression chords. The tension elements and their joints remained undisturbed. The experimental structure has a safety factor of 2. Compared to the design load, such a value shows that the experimental truss has the required bearing capacity and is robust. The findings confirm that the strength properties of heartwood beams match the requirements for elements of load-bearing structures. The strength properties of heartwood beams make it possible to use them to manufacture load-bearing structures. |
| first_indexed | 2024-12-11T09:45:37Z |
| format | Article |
| id | doaj.art-721889ee7f64408f8ec376993282e77b |
| institution | Directory Open Access Journal |
| issn | 2500-0055 2500-0055 |
| language | English |
| last_indexed | 2024-12-11T09:45:37Z |
| publishDate | 2020-06-01 |
| publisher | Saint Petersburg State University of Architecture and Civil Engineering |
| record_format | Article |
| series | Architecture and Engineering |
| spelling | doaj.art-721889ee7f64408f8ec376993282e77b2022-12-22T01:12:33ZengSaint Petersburg State University of Architecture and Civil EngineeringArchitecture and Engineering2500-00552500-00552020-06-0152253110.23968/2500-0055-2020-5-2-25-31STRENGTH PROPERTIES OF TRUSS ELEMENTS MADE OF ENVIRONMENTALLY-FRIENDLY STRUCTURAL LUMBERVladimir Melekhov0Viktor Byzov1Aleksandr Chernykh2Shirali Mamedov3Northern (Arctic) Federal University named after M.V. LomonosovSaint Petersburg State University of Architecture and Civil EngineeringSaint Petersburg State University of Architecture and Civil EngineeringSaint Petersburg State University of Architecture and Civil EngineeringIntroduction: Softwood lumber is widely used to manufacture load-bearing structures. However, the quality of round wood used to manufacture such lumber has been deteriorating lately. Round wood decreases in diameter and often has heart rot. The article looks into the possibility of manufacturing elements of load-bearing structures using beams made of round wood of small diameter that have not been previously used to manufacture structural materials for construction purposes. It is suggested to make beams of such round wood preserving the trunk structure to the maximum (heartwood beams). Due to the preservation of the annual growth ring pattern, such beams have better strength properties as compared to traditional structural lumber. Purpose of the study: The study is aimed to determine the strength properties of engineering structures’ elements made of heartwood beams sawn from round wood of small diameter. Methods: The authors tested an experimental truss made of heartwood beams by means of incremental loading until destruction. Results: The strength properties of the truss elements made of heartwood beams sawn from round wood of small diameter were determined. There is a good fit between the calculated values of stress in the truss elements and the experimental data. The structure was damaged in the panel points connecting the compression strut with the elements of the tension and compression chords. The tension elements and their joints remained undisturbed. The experimental structure has a safety factor of 2. Compared to the design load, such a value shows that the experimental truss has the required bearing capacity and is robust. The findings confirm that the strength properties of heartwood beams match the requirements for elements of load-bearing structures. The strength properties of heartwood beams make it possible to use them to manufacture load-bearing structures.https://aej.spbgasu.ru/index.php/AE/article/view/297/162load-bearing structuresstrength properties of beamsannual growth ring patternexperimental-truss testing. |
| spellingShingle | Vladimir Melekhov Viktor Byzov Aleksandr Chernykh Shirali Mamedov STRENGTH PROPERTIES OF TRUSS ELEMENTS MADE OF ENVIRONMENTALLY-FRIENDLY STRUCTURAL LUMBER Architecture and Engineering load-bearing structures strength properties of beams annual growth ring pattern experimental-truss testing. |
| title | STRENGTH PROPERTIES OF TRUSS ELEMENTS MADE OF ENVIRONMENTALLY-FRIENDLY STRUCTURAL LUMBER |
| title_full | STRENGTH PROPERTIES OF TRUSS ELEMENTS MADE OF ENVIRONMENTALLY-FRIENDLY STRUCTURAL LUMBER |
| title_fullStr | STRENGTH PROPERTIES OF TRUSS ELEMENTS MADE OF ENVIRONMENTALLY-FRIENDLY STRUCTURAL LUMBER |
| title_full_unstemmed | STRENGTH PROPERTIES OF TRUSS ELEMENTS MADE OF ENVIRONMENTALLY-FRIENDLY STRUCTURAL LUMBER |
| title_short | STRENGTH PROPERTIES OF TRUSS ELEMENTS MADE OF ENVIRONMENTALLY-FRIENDLY STRUCTURAL LUMBER |
| title_sort | strength properties of truss elements made of environmentally friendly structural lumber |
| topic | load-bearing structures strength properties of beams annual growth ring pattern experimental-truss testing. |
| url | https://aej.spbgasu.ru/index.php/AE/article/view/297/162 |
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