Analysis of calculated and observed settlements of the silo on loess

Santrač, Petar

doi:10.17559/tv-20140615132437

Cited by 7 publications

(2 citation statements)

References 8 publications

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“…However, they were loess with different parameters, much lower q c in the range of 1.0-3.0 MPa and with a weight from 12.6 to 17.2 kN/m 3 , so much lower than the analysed ones. Santrač et al [70] conducted analyses of the settlement of a silo located in the loess near the village of Novi Sad in Serbia. They also obtained a settlement of more than 20 cm.…”

Section: Discussionmentioning

confidence: 99%

3D FEM Analysis of the Subsoil-Building Interaction

Nepelski

2022

Applied Sciences

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This paper presents the process of advanced numerical analysis of interaction between a building and the subsoil. The analysis covered a wide range of work for both computing and research. As part of the research work, field and laboratory subsoil tests were carried out, as well as geodetic measurements of building settlement and measurements of natural vibrations of an object. The computational work included the analysis of a total of 47 FEM models. The subsoil was described using the Modified Cam-Clay model, with parameters determined using field CPT and SDMT tests, as well as triaxial and edometric laboratory tests. Parts with geodetic benchmarks were separated from the building model, and then multi-variant calculations were made on smaller, partial models with parameters obtained from various methods. Calibration of the main models was performed using 8 partial models for which calculations were carried out in 4–5 variants of parameters. This gave a total of 38 partial models. Then, calculations were carried out on the full model of the building with subsoil. At each stage, the results of vertical displacements were compared to the geodetic values. The measured settlement of the real building in the time from the construction of the underground story to its use for the period of 1 year, was from 2.3 mm to 7.8 mm. The settlement from FEM calculations of small calibration models for the same benchmarks was from 2.0 mm to 9.8 mm with parameters derived from CPT tests and from 1.8 to 7.3 mm for parameters derived from SDMT. For the full building model, settlement from FEM calculations ranged from 2.2 to 8.8 for the variant with a simplified subsoil model, and from 3.7 to 10.5 for the model taking into account the inhomogeneity of the subsoil. As a result, it was found that the displacements from the numerical analysis were convergent with the geodetic values. Detailed numerical analyses also allowed to detect the deviations of the segments from the vertical and to indicate potential damage to the structure. It was also indicated how the work of the subsoil influences the stress distribution in selected structural elements. Behaviour of the subsoil has an impact on the behaviour of the building and its deformations, as well as on the distribution of stresses in the structural elements, and, as a result, on the change in the distribution of internal forces in the structure.

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Section: Discussionmentioning

confidence: 99%

3D FEM Analysis of the Subsoil-Building Interaction

Nepelski

2022

Applied Sciences

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“…Serb loess was also subjected to oedometric test regarding the collapsibility. Meanwhile, observations of subsidence of the existing complex of agricultural buildings were performed [37]. The complex located near Feketić included a mill, an outhouse and an accompanying grain silos.…”

Section: Research Of Collapsibility Of European Loessmentioning

confidence: 99%

Research of the collapsibility of the European loess – review

Lal

2019

Bud-Arch

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Foundation of the buildings on the loessial soil is often associated only with difficulties resulting from the possibility of the collapse of the ground. For these reason, loess is too often unfairly disqualified as the construction subsoil in spite of its good strength and strain parameters. Thanks to continuous development of research and publications of the results, reliable data regarding loess are spread and, as a consequence, loess becomes more and more common soil used in the geotechnicalengineering.Loess collapsibility has been studied since the middle of the 20th century, nevertheless, only the computer techniques and specialist laboratory and microstructural tests, that have been developed from the end of last century, helped us to find an answer to the important questions regarding the occurrence of this phenomenon. Detailed mechanisms that cause sudden loess volumetric reduction due to humidity and load, and the elements that affects the collapsibility are still studied. Furthermore, varied technics are researched, including in-situ tests, which allow estimating the risk of collapse, as well as the methods of its elimination.The aim of this paper is to systematize the directions of current studies of European loess collapsibility and to indicate their most significant results. The review was made on the basis of the scientific publications published in the Polish and international journals as well as the Journal Citation Reports (JCR) Web of Science database.

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