Mechanical behavior of trees with structural defects under lateral load: a numerical modeling approach

Tree structural defects are a common cause of tree failure. These structural defects often result from progressive wood decay over time. Therefore, special attention is required to study the changes in the lateral responses of trees as defects are introduced. This can show how, using these changes,...

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Main Authors: Kim, Yongmin, Rahardjo, Harianto, Lee, Daryl Tsen-Tieng
Other Authors: School of Civil and Environmental Engineering
Format: Article
Language:English
Published: 2022
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Online Access:https://hdl.handle.net/10356/159820
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1598202022-07-06T05:22:21Z Mechanical behavior of trees with structural defects under lateral load: a numerical modeling approach Kim, Yongmin Rahardjo, Harianto Lee, Daryl Tsen-Tieng School of Civil and Environmental Engineering Engineering::Civil engineering::Geotechnical Decay Root Plate Tree Failure Tree structural defects are a common cause of tree failure. These structural defects often result from progressive wood decay over time. Therefore, special attention is required to study the changes in the lateral responses of trees as defects are introduced. This can show how, using these changes, significant tree defects that can ultimately disrupt tree stability be detected. In this study, a three-dimensional (3D) numerical model was proposed to investigate the mechanical behavior of trees with structural defects under lateral load. The 3D numerical model was verified by non-destructive tree pulling tests with the incorporation of the overall stiffness of the tested trees. Then, trees with structural defects were simulated with different tree geometries and defect sizes. In addition, to examine the effect of decay volume extents and deterioration in elastic modulus due to decay, a simplified two-dimensional (2D) numerical simulation was performed. Through comparison with the results of the tree pulling tests, the 3D numerical model was found to be appropriate and applicable for the evaluation of the tree’s lateral response as well as the effects on tree stability. Numerical analysis results, therefore, confirmed the fact that the mechanical behavior of the tree under lateral load is strongly dependent on the presence of significant decay that can cause whole tree failure. National Parks Board Submitted/Accepted version The research presented in this paper was supported by National Parks Board, Singapore through a collaborative research project with Nanyang Technological University entitled Eye On Trees (EOT). 2022-07-06T05:22:20Z 2022-07-06T05:22:20Z 2021 Journal Article Kim, Y., Rahardjo, H. & Lee, D. T. (2021). Mechanical behavior of trees with structural defects under lateral load: a numerical modeling approach. Urban Forestry & Urban Greening, 59, 126987-. https://dx.doi.org/10.1016/j.ufug.2021.126987 1618-8667 https://hdl.handle.net/10356/159820 10.1016/j.ufug.2021.126987 59 126987 en Urban Forestry & Urban Greening © 2021 Elsevier GmbH. All rights reserved. This paper was published in Urban Forestry & Urban Greening and is made available with permission of Elsevier GmbH. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Civil engineering::Geotechnical
Decay
Root Plate
Tree Failure
spellingShingle Engineering::Civil engineering::Geotechnical
Decay
Root Plate
Tree Failure
Kim, Yongmin
Rahardjo, Harianto
Lee, Daryl Tsen-Tieng
Mechanical behavior of trees with structural defects under lateral load: a numerical modeling approach
description Tree structural defects are a common cause of tree failure. These structural defects often result from progressive wood decay over time. Therefore, special attention is required to study the changes in the lateral responses of trees as defects are introduced. This can show how, using these changes, significant tree defects that can ultimately disrupt tree stability be detected. In this study, a three-dimensional (3D) numerical model was proposed to investigate the mechanical behavior of trees with structural defects under lateral load. The 3D numerical model was verified by non-destructive tree pulling tests with the incorporation of the overall stiffness of the tested trees. Then, trees with structural defects were simulated with different tree geometries and defect sizes. In addition, to examine the effect of decay volume extents and deterioration in elastic modulus due to decay, a simplified two-dimensional (2D) numerical simulation was performed. Through comparison with the results of the tree pulling tests, the 3D numerical model was found to be appropriate and applicable for the evaluation of the tree’s lateral response as well as the effects on tree stability. Numerical analysis results, therefore, confirmed the fact that the mechanical behavior of the tree under lateral load is strongly dependent on the presence of significant decay that can cause whole tree failure.
author2 School of Civil and Environmental Engineering
author_facet School of Civil and Environmental Engineering
Kim, Yongmin
Rahardjo, Harianto
Lee, Daryl Tsen-Tieng
format Article
author Kim, Yongmin
Rahardjo, Harianto
Lee, Daryl Tsen-Tieng
author_sort Kim, Yongmin
title Mechanical behavior of trees with structural defects under lateral load: a numerical modeling approach
title_short Mechanical behavior of trees with structural defects under lateral load: a numerical modeling approach
title_full Mechanical behavior of trees with structural defects under lateral load: a numerical modeling approach
title_fullStr Mechanical behavior of trees with structural defects under lateral load: a numerical modeling approach
title_full_unstemmed Mechanical behavior of trees with structural defects under lateral load: a numerical modeling approach
title_sort mechanical behavior of trees with structural defects under lateral load: a numerical modeling approach
publishDate 2022
url https://hdl.handle.net/10356/159820
_version_ 1738844807868973056