20.500.12556/DKUM-70852 Numerical modeling of the negative skin friction on single vertical and batter pile Numerično modeliranje negativnega trenja plašča na posamičnem vertikalnem nagnjenem pilotu In this paper the negative skin friction on single vertical and batter piles is investigated. First, a finite-element model (using ABAQUS software) based on the studies Lee et al. and Comodromos and Bareka was developed. After that, the results of the model were compared and validated. Then a single vertical end bearing and a single skin friction pile under different earth-surface loadings were analyzed and the down-drag force as well as the neutral plane location were studied. Subsequently, the performances of the single end bearing and the friction pile, with different inclination angles between 0 and 30º, were analyzed. Moreover, the sensitivity analysis was implemented using 2-D models. This showed a satisfactory compatibility with the results of the study of Lee et al. and Comodromos and Bareka. Finally, it was concluded that the drag load of the pile and the neutral plane position depend on the condition of the soil surrounding the pile, the 2D or 3D model type , the earth-surface loading intensity, the type of end-bearing pile or friction pile and the pile’s inclination angle. The simulation results agree well with the experimental findings. V članku je preučevano negativno trenje na posamičnem vertikalnem in nagnjenem pilotu. Razvit je bil model s končnimi elementi (z uporabo ABAQUS programske opreme) na osnovi študij Lee in drugi in Comodromos in Bareka. Rezultati modela so bili primerjani z znanimi potrjenimi rešitvami, nato je bil za različne obtežbe na površini analiziran posamični vertikalni pilot, ki nosi na nogi in plašču, pri čemer sta bili preučevani trenjska sila zaradi negativnega trenja in položaj nevtralne ravnine. Nadalje je bila izvedena analiza odziva posamičnega pilota, ki nosi na nogi in plašču za različne kote naklona pilota med 0 in 30°. Poleg tega je bila z 2-D modeli izvedena analiza občutljivosti. Analiza je pokazala zadovoljivo skladnost z rezultati študije avtorjev Lee in drugi ter Comodromos in Bareka. Na koncu je bilo ugotovljeno, da sta trenjska sila zaradi negativnega trenja in položaj nevtralne ravnine odvisna od stanja tal okoli pilota, od uporabe 2-D ali 3-D modela, intenzitete obtežbe na površini, tipa pilota (nosilnost na nogi ali na plašču) in odklona pilota od vertikale. negative skin friction batter pile down-drag force neutral plane gradbeništvo piloti nagnjen pilot trenje negativno trenje na plašču numerično modeliranje trenjska sila zaradi negativnega trenja nevtralna ravnina true false true Angleški jezik Slovenski jezik Fakulteta za gradbeništvo, prometno inženirstvo in arhitekturo Univerze v Mariboru Znanstveno delo 2018-06-15 14:01:43 2018-06-15 14:02:42 2022-08-01 19:54:31 2019-07-11 18:22:02 2015 0 0 str. 47-55 št. 2 Letn. 12 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1854-0171 624.154 215987712 284299008 1854-0171 URN:SI:UM:DK:VWKZOPIZ Acta_geotechnica_Slovenica_2015_Hajitaheri_Ha,_Hassanlourad_Numerical_modeling_of_the_negative_skin_friction_on_single_vertical_and_batt.pdf Acta_geotechnica_Slovenica_2015_Hajitaheri_Ha,_Hassanlourad_Numerical_modeling_of_the_negative_skin_friction_on_single_vertical_and_batt.pdf 1 6760F79FD5F1D554CE95D50DD1A2C37F 3072c45712463d046897cc8e62dc528468fa8783b2cf257b91c3b162ec374e6e 0a730ee6-7c10-11eb-bb7a-00155d0001ca 20.500.12556/dkum/df96ff9d-fd9b-4926-84a8-2967c84a7c00 https://dk.um.si/Dokument.php?lang=slv&id=125753 http://fgserver3.fg.um.si/journal-ags/2015-2/article-4.asp 1 https://dk.um.si/Dokument.php?lang=slv&id=125754 Fakulteta za gradbeništvo, prometno inženirstvo in arhitekturo Acta geotechnica Slovenica 0 0 0