Behavior of Greenhouse Foundations Subjected to Uplift Loads

Peña, Araceli; Valera, D.L.; Perez, F; Ayuso, Javier Perez; Pérez, J.

doi:10.13031/2013.17607

Cited by 3 publications

(3 citation statements)

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“…For greenhouses in Spain, three types of foundations (i.e., piles with full-length concrete, free-base anchorage, and piles with partial-length concrete) were tested against the pull-out force in the field, and numerical simulations were performed [18]. Similar to other studies, the pull-out resistance increased with the embedment depth and foundation diameter.…”

Section: Introductionmentioning

confidence: 88%

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Pull-Out Resistance of Rebar Stake Depending on Installation Conditions and Compaction Levels of Agricultural Soil

Heo,

Choi,

Lee

et al. 2024

Horticulturae

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Strong winds, particularly in the absence of disaster-resistant designs, significantly impact the stability of greenhouse foundations and eventually lead to structural damage and potential harm to crops. As a countermeasure, rebar stakes are commonly used to reinforce the foundations of non-disaster-resistant greenhouses. This study evaluates the pull-out resistance (Rpull-out) of rebar stakes considering various factors like soil compaction, embedded length, installation duration and angle, and changes in soil water content against uplift pressure by strong winds. A combination of field (i.e., the cone penetration test and rebar stake pull-out test) and laboratory (i.e., the compaction test, soil compaction meter test, and soil box test) tests are performed for the assessment of Rpull-out. The results indicate that Rpull-out increases with higher soil compaction, greater embedded length, longer installation duration, and an inclined installation angle. The soil compaction exerts the most significant impact; 90% to 100% of the soil compaction rate has approximately 10 folds higher Rpull-out than the 60–70% compaction rate. If the embedded length is increased from 20 cm to 40 cm, there is a two-fold increase in the average of Rpull-out. Inclined installation of rebar stakes increases Rpull-out by 250% to 350% compared to vertical installation, and rebar stakes installed prior to the uplift event have 1.5 to 6.4 fold increases in Rpull-out than those with instant installation. Additionally, we observed variations in the surface soil moisture due to climatic changes introducing variability in Rpull-out. These findings lead to the proposition of efficient rebar stake installation methods, contributing to the enhanced stability of a greenhouse.

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Section: Introductionmentioning

confidence: 88%

“…Previous studies have examined various greenhouse foundation systems [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24]. In South Korea, several studies examined the pull-out resistance of continuous pipe foundations compared with other types of foundations using a soil container [25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Pull-Out Resistance of Rebar Stake Depending on Installation Conditions and Compaction Levels of Agricultural Soil

Heo,

Choi,

Lee

et al. 2024

Horticulturae

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“…The mechanical performance of different greenhouse structures has been studied by numerical methods [5] and finite elements for static loads [6] and dynamic loads [7]. For this type of structure, there are few real data that can be used to validate calculation models [8,9], due to the high economic cost of monitoring structural performance. Some types of greenhouses with inflexible cladding have been tested on a small scale in wind tunnels to obtain the pressure coefficients on multi-span duo-pitch roofs [10] or single-span roofs with different geometries [11].…”

Section: Introductionmentioning

confidence: 99%

Design and Testing of a Structural Monitoring System in an Almería-Type Tensioned Structure Greenhouse

Peña

Peralta

Marín

2020

Sensors

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Greenhouse cultivation has gained a special importance in recent years and become the basis of the economy in south-eastern Spain. The structures used are light and, due to weather events, often collapse completely or partially, which has generated interest in the study of these unique buildings. This study presents a load and displacement monitoring system that was designed, and full scale tested, in an Almería-type greenhouse with a tensioned wire structure. The loads and displacements measured under real load conditions were recorded for multiple time periods. The traction force on the roof cables decreased up to 22% for a temperature increase of 30 °C, and the compression force decreased up to 16.1% on the columns or pillars for a temperature and wind speed increase of 25.8 °C and 1.9 m/s respectively. The results show that the structure is susceptible to daily temperature changes and, to a lesser extent, wind throughout the test. The monitoring system, which uses load cells to measure loads and machine vision techniques to measure displacements, is appropriate for use in different types of greenhouses.

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Preventive activity in the greenhouse-construction industry of south-eastern Spain

et al. 2011

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Behavior of Greenhouse Foundations Subjected to Uplift Loads

Cited by 3 publications

References 0 publications

Pull-Out Resistance of Rebar Stake Depending on Installation Conditions and Compaction Levels of Agricultural Soil

Pull-Out Resistance of Rebar Stake Depending on Installation Conditions and Compaction Levels of Agricultural Soil

Design and Testing of a Structural Monitoring System in an Almería-Type Tensioned Structure Greenhouse

Preventive activity in the greenhouse-construction industry of south-eastern Spain

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