Blar i NTNU Open på forfatter "Grimstad, Gustav"
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Development and Evaluation of an Effective Stress Based Model for Soft Clays
Bjerre, Jesper (Master thesis, 2015)The term, natural soft clay, is commonly used to describe a normal or slightly overconsolidated clay. This soil type may be encountered in e.g. Scandinavia, Eastern Canada and South East Asia. The mechanical response of ... -
Development and Implementation of Effective Stress Soil Models
Gavel-Solberg, Vegard (Master thesis, 2014)Soil exhibit complex behavior that require advanced models to recreate stiffness and strength during loading. The complex behavior may be due to preconsolidation, dilation and contraction, softening, anisotropy, stress ... -
Development of effective stress based anisotropic models for soft clays
Grimstad, Gustav (Doktoravhandlinger ved NTNU, 1503-8181; 2009:169, Doctoral thesis, 2009) -
Effect of initially inclined principle stress directions on undrained shear strength for anisotropic clay
Jordbakke, Tormod (Master thesis, 2017)In this thesis is a continuation of Rabstad's and Isachsen's work on the user-defined soil model ADPXX is done. The model aims to include initially consolidated shear stressesin the yield criterion for anisotropic clays, ... -
Effect of Strength Anisotropy on the Stability of Natural Slopes
Aamodt, Magnus T; Grimstad, Gustav; Nordal, Steinar (Journal article; Peer reviewed, 2021)It is well known that low plasticity soft clays have large variations in undrained shear strength with the direction of loading. Laboratory experiments show typically a cross anisotropic behavior, where the undrained shear ... -
Effect of Temperature on Measured Strength Parameters from Variations in Both Storage and Testing Temperatures
Gangenes, Kathrine Buene (Master thesis, 2017)The effect of temperature on laboratory tested mechanical properties of clay has been debated for many years. The fact that soil parameters are affected by variations in temperature is generally agreed upon, resulting in ... -
Effective Stress based Model for Natural Soft Clays incorporating Restructuration
Bjerre, Jesper; Rønningen, Jon Abusland; Grimstad, Gustav; Nordal, Steinar (Chapter, 2018)Several advanced constitutive models have been developed over the last decades to reproduce the mechanical response of natural soft clays observed during laboratory testing and in the field. Features such as anisotropy, ... -
Effective stress models for soft Scandinavian clays
Rønningen, Jon A. (Doctoral theses at NTNU;2019:329, Doctoral thesis, 2019)The modelling of soft Scandinavian clays requires an effective stress based approach, if a complete stress response is to be provided for different loading conditions. Although, the observed behavior is complex, it is seen ... -
Ekvivalente jordfjærer for beregning av platefundament
Jakobsen, Sigurd Solberg (Master thesis, 2015)Winkler foreslo at kontakttrykket, p, i et punkt under et platefundament er proporsjonalt med setningen, s, i det samme punktet. Dette gir stivheten, k = p / s, av de lineært elastiske og innbyrdes uavhengige ekvivalente ... -
Empirical and Numerical Analysis of the Retrogression in the Gjerdrum Landslide
Rogstad, Agnete (Master thesis, 2022)Den 30. desember 2020 gikk det et stort kvikkleireskred på Ask i Gjerdrum. Ti personer og et ufødt barn mistet livet, og skredet forårsaket store skader på bygninger og infrastruktur. For å forhindre slike skredhendelser ... -
Engineering properties of Norwegian peat for calculation of settlements
Long, Mike; Paniagua Lopez, Ana Priscilla; Grimstad, Gustav; Trafford, Andrew; Degago, Samson Abate; L Heureux, Jean-Sebastien (Peer reviewed; Journal article, 2022)Despite some 9% of Norway's area being underlain by peat the geotechnical characteristics of the material have not been well documented. As peatlands form an excellent carbon sink there is much pressure on planning authorities ... -
Enhanced permafrost creep model– user manual and documentation
Ghoreishian Amiri, Seyed Ali; Kadivar, Mehdi (Research report, 2016)The mechanical behavior of frozen soils is one of the challenging topics in the field of geotechnical engineering. The behavior of frozen soils is strongly affected by the amount of ice, while on the other hand, the amount ... -
Et Laboratoriestudie på Hviletrykkskoeffisientens Utvikling under Kryp for både Uforstyrret og Omrørt, Rekonsolidert Tillerleire
Gjengstø, Bård Arvid (Master thesis, 2016)For å løse mange geotekniske problemer er det nødvendig med antagelser om hvilke initielle spenningstilstander jorden er påvirket av. Forholdet mellom horisontal og vertikal effektiv spenning beskrives med jordtrykkskoeffisienten ... -
Evaluation of Pile Driving Effects on Slope Stability in Clay
Attari, Yeganeh; Jostad, Hans Petter; Grimstad, Gustav; Eiksund, Gudmund Reidar (Peer reviewed; Journal article, 2023)Pile driving can trigger slope failure, specifically in sensitive soil deposits or marginally stable slopes. Cases of slope failure during pile installation have been reported in countries such as Norway, Sweden and Canada ... -
Evaluation of Thermosyphons for Permafrost Stabilization in Longyearbyen
Skrebergene, Ole Kristian (Master thesis, 2023)Denne rapporten undersøker effektiviteten av termosifoner som en bærekraftig løsning for å opprettholde permafrostintegriteten i konteksten av skiftende klimaforhold i Longyearbyen, Svalbard. Studien tar sikte på å vurdere ... -
Experimental and numerical studies related to failure of first-year ice ridges against fixed vertically sided structures
Ervik, Åse (Doctoral theses at NTNU;2019:192, Doctoral thesis, 2019) -
Finite Element Analysis of Coupled Thermo-Hydro-Mechanical Processes in Fully Saturated, Partially Frozen Soils
Rostami, Hooman (Master thesis, 2017)Interest in permafrost, or seasonally frozen ground, has been increasing over the last decades. Nearly 24% of the northern hemisphere, is covered with permafrost. Humankind's need for energy and raw materials has pushed ... -
Finite element modelling of soft sensitive clays: Regularisation by the non-local strain method or rate dependency and pore water flow
Rødvand, Laura Anne (Doctoral theses at NTNU;2023:55, Doctoral thesis, 2023) -
Formation and growth of multiple, distinct ice lenses in frost heave
Gao, Hao; Ghoreishian Amiri, Seyed Ali; Kjelstrup, Signe; Grimstad, Gustav; Loranger, Benoit; Scibilia, Elena (Peer reviewed; Journal article, 2022)This paper presents a fully coupled thermo-hydro-mechanical (THM) modelwhich simulates frost heave in fully saturated soils. The model is able tosimulate the formation and growth of multiple distinct ice lenses. The ... -
Frost protection in roads using insulation materials
Grimstad, Gustav; Ghoreishian Amiri, Seyed Ali; Watn, Arnstein; Hoff, Inge (Chapter, 2018)