Mechanical response of the real tree root architecture under lateral load

Ramos-Rivera, Johnatan; Rahardjo, Harianto; Tsen-Tieng, Daryl Lee; Nong, Xue-Feng; King, Fong Yok

doi:10.1139/cjfr-2019-0332

Cited by 10 publications

(3 citation statements)

References 21 publications

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“…Some numerical studies on root-soil interaction of trees under lateral loads (e.g. Rahardjo et al, 2009;Yang et al, 2017;Kim et al, 2020;Ramos-Rivera et al, 2020) have suggested that rooting length and depth and windward roots contributed mostly to the tree anchorage strength. However, how these findings on root-soil interaction mechanics translate to different loading conditions (groundwater, rate) is uncertain.…”

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confidence: 99%

Centrifuge modelling of root–soil interaction of laterally loaded trees under different loading conditions

et al. 2023

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Understanding the stability of trees under lateral loads arising from natural hazards (e.g. extreme weather and debris flows) is important as fallen trees can become a potential threat to life and infrastructure. Two 1:20 scale 3D printed analogue root system models with architectures from field-surveyed root architecture data, were used to simulate the push-over behaviour of trees in silty sand under different conditions in the centrifuge. The peak overturning moments obtained were verified against data from field winching tests. Horizontal roots orientated in the loading direction and the central taproot complex contributed most to the overturning resistance. Increasing soil matric suction due to a lowering of the water table, increasing the loading rate and considering the presence of the fine root fraction all resulted in higher moment capacity and rotational stiffness of the root systems. The overturning behaviour was ductile in fully saturated soil and more brittle in partially saturated cases, with more root breakages in the windward horizontal roots and the taproot complex in the latter. These results suggest that it is important to measure the groundwater conditions when conducting winching tests and demonstrate a connection between soil effective stress, total root breakage area and peak moment resistance.

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Section: Auto-generated Pdf By Review Géotechniquementioning

confidence: 99%

Centrifuge modelling of root–soil interaction of laterally loaded trees under different loading conditions

et al. 2023

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“…Considering historic trees, continuous, ongoing care, and keeping them in good condition while maintaining the appropriate conservation standards is particularly important [12][13][14]. In urban areas, there are occasions in which individual trees can fail under the influence of high wind loads, thus, causing a danger to people and property [15]. A large part of this urban greenery comprises thousands of mature trees that can be found growing along roadsides, in parks, and within residential, industrial, shopping, and business districts.…”

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confidence: 99%

Sustainable Management of Very Large Trees with the Use of Acoustic Tomography

Dudkiewicz

Durlak

2021

Sustainability

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This manuscript summarizes the process by which large trees are protected in Poland, how they gain protected status, and the use of acoustic tomography to assess the structural soundness of five individual trees. The authors discuss tree stressors and tree care options, and how the outcome of each assessment was used in the decision-making process. Moreover, the use of acoustic tomography as an assessment tool helps to gain public acceptance for the assessment. In sustainable development, there is talk of the conscious management of urban vegetation, and specifically tree populations in the city. In line with sustainable development, actions are taken to manage the existing natural resources, e.g., historic trees, properly. Thanks to using an acoustic tomograph, it is possible to diagnose old tree specimens, take care of the safety of people and property near the natural monument, and to test candidates for their eligibility as monuments. Thanks to the research presented, it was ordered that one poplar tree be left and observed in Lublin, that two linden trees be cut down in Sandomierz and Lublin, that arborist works consisting of lowering the height of a linden tree in Sandomierz be undertaken, and that monument protection be applied for an ash tree in Łęczna. A visual tree assessment (VTA) was the starting point for this research. Each of the trees could endanger the safety of site users, and the diagnostics performed using sound waves were crucial in assessing their health condition. Our results highlight that acoustic tomography is an essential diagnostic method applicable to trees belonging to cultural heritage, such as old trees, and is effective in preventive tree management through the monitoring of mid- to long-term changes in internal decay or cavities that are difficult to diagnose with the naked eye.

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“…b) QP2 -Quais são as principais técnicas usadas na análise e conservação da saúde das árvores e florestas urbanas, no que diz respeito ao risco de queda? i. Uma forma de avalição convencional é feita de modo subjetivo e visual por um inspetor, o que não garante que o julgamento de dois inspetores seja o mesmo para as mesmas condições(BRAZOLIN, 2009;RAMOS-RIVERA et al, 2020).…”

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Proposta de sistema de monitoramento de árvores utilizando sensores inerciais dentro do paradigma de internet das coisas.

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The presence of trees in urban centers provides a series of benefits for individual and community well-being. Therefore, it is important to maintain them properly in cities, otherwise it can cause a high number of ruptures or falls, which can lead to human or material losses. With tools for preventive or corrective actions in relation to the impacts of winds and storms on trees and urban forests, it is possible to prevent or reduce damage from these occurrences. In this sense, this research proposed a tree monitoring system, focusing on the analysis and prediction of the risk of tree falls in urban environments. The proposed hypothesis seeks to obtain the relationship between wind speed and the variables related to the rupture of a tree. Using the prototyping methodology, a system was designed and implemented to prove the hypotheses raised. A mathematical modeling was used to predict the point of fall and rupture of the tree, and the prototypes were evaluated through laboratory and field experiments. By carrying out experiments to validate the processing and energy consumption, using a time stamp on the generated data, results were obtained that show the viability of a monitoring system, highlighting as one of the main results the data collection system based on the internet of things, with sensors installed in trees and data storage and analysis performed in the cloud.

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Mechanical response of the real tree root architecture under lateral load

Cited by 10 publications

References 21 publications

Centrifuge modelling of root–soil interaction of laterally loaded trees under different loading conditions

Centrifuge modelling of root–soil interaction of laterally loaded trees under different loading conditions

Sustainable Management of Very Large Trees with the Use of Acoustic Tomography

Proposta de sistema de monitoramento de árvores utilizando sensores inerciais dentro do paradigma de internet das coisas.

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