Napetostno - deformacijska stanja v peščenih materialih

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Jezik:	Slovenski jezik
Leto izida:	2010
Izvor:	Ljubljana
Tipologija:	2.11 - Diplomsko delo
Organizacija:	UL FGG - Fakulteta za gradbeništvo in geodezijo
Založnik:	[B. Likar]
UDK:	624.131(043.2)
COBISS:	5004385
Št. ogledov:	1567
Št. prenosov:	398
Ocena:	0 (0 glasov)
Metapodatki:

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Sekundarni jezik:	Angleški jezik
Sekundarni naslov:	Stress - strain states in sandy materials
Sekundarni povzetek:	Thesis compares dynamic shear modulus of soil in different stress states obtained by tests in hollow cylinder apparatus. The first part of thesis represents theoretical background of cyclic torsional shear test on hollow cylindrical specimens in sense of stresses and strains which appear in hollow cylindrical specimens during testing. This part includes also conclusions of tests mentioned in the literature. Next part is a study of a procedure for preparation of sandy specimens and testing procedure according to the Japanese standards for determination of deformation properties of soil with hollow cylinder apparatus (JGS 0543-2000). After literature review in first part of thesis experimental part follows in which cyclic torsional shear tests on hollow cylindrical specimens were done with purpose to determine an impact of anisotropic consolidation on dynamic shear modulus of soil. Six tests were made in two different sandy materials with different initial effective circumferential stresses. All tests were in first part deformation controlled like it is prescribed in mentioned Japanese standard. The assumption of an impact of anisotropic consolidation on the shear stiffness of soil planed to be confirmed. The second part of tests were stress controlled test in few steps to see what is the impact of different direction (shear, axial, shear and axial) of loading up on the response of soil. The specimens of one-granular sand were prepared after dry deposition method, while samples of sandy silt were prepared after sedimentation method.
Sekundarne ključne besede:	civil engineering;graduation thesis;geotechnical;soil testing;torsional Shear Test on hollow cylindrical soil specimens;dynamic shear modulus;
Vrsta datoteke:	application/pdf
Vrsta dela (COBISS):	Diplomsko delo
Komentar na gradivo:	Univ. v Ljubljani, Fak. za gradbeništvo in geodezijo
Strani:	XII, 94 str., pril.
Vrsta dela (ePrints):	thesis
Naslov (ePrints):	Stress-strain states in sandy materials
Ključne besede (ePrints):	geotehnika;preizkuševanje zemljin;torzijske triosne preiskave votlih vzorcev;dinamični strižni modul zemljin
Ključne besede (ePrints, sekundarni jezik):	Geotechnical;Soil Testing;Torsional Shear Test on Hollow Cylindrical Soil Specimens;dynamic shear modulus
Povzetek (ePrints):	Diplomsko delo obravnava raziskave dinamičnega strižnega modula zemljin pri različnih napetostnih stanjih, dobljenega s pomočjo torzijskega triosnega aparata za votle vzorce. Prvi del naloge predstavlja teoretično osnovo torzijskih triosnih preiskav votlih vzorcev v smislu predstavitve napetosti in deformacij, ki se pojavijo v vzorcu med preiskovanjem, ter zaključke že opravljenih tovrstnih preiskav predstavljenih v strokovni literaturi. Sledi študij postopka izvajanja preiskav od pripravljanja peščenih vzorcev do samega poteka preiskav, povzetega po japonskem standardu za določitev deformacijskih lastnosti zemljin s pomočjo torzijske triosne preiskave votlega vzorca (JGS 0543-2000). V nadaljevanju so bile opravljene preiskave z namenom ugotavljanja vpliva anizotropne konsolidacije na strižni modul zemljine. Opravljenih je bilo šest preiskav na dveh različnih materialih pri različnih začetnih efektivnih napetostih v obročni smeri. Vse preiskave so bile v prvem delu vodene deformacijsko po omenjenem japonskem standardu. Z njimi smo želeli potrditi začetno predpostavko o vplivu anizotropne konsolidacije na strižno togost zemljin. V drugem delu je bil vzorec obremenjen z napetostno vodeno obremenitvijo v več stopnjah z namenom ugotavljanja vpliva različnih smeri obremenjevanja (strižna, vertikalna, strižna in vertikalna) na obnašanje zemljine. Vzorci iz enozrnatega peska so bili pripravljeni po metodi suhega nasipavanja in zbijanja, medtem ko je bila za pripravo vzorcev iz peščenega melja izbrana sedimentacijska metoda.
Povzetek (ePrints, sekundarni jezik):	Thesis compares dynamic shear modulus of soil in different stress states obtained by tests in hollow cylinder apparatus. The first part of thesis represents theoretical background of cyclic torsional shear test on hollow cylindrical specimens in sense of stresses and strains which appear in hollow cylindrical specimens during testing. This part includes also conclusions of tests mentioned in the literature. Next part is a study of a procedure for preparation of sandy specimens and testing procedure according to the Japanese standards for determination of deformation properties of soil with hollow cylinder apparatus (JGS 0543-2000). After literature review in first part of thesis experimental part follows in which cyclic torsional shear tests on hollow cylindrical specimens were done with purpose to determine an impact of anisotropic consolidation on dynamic shear modulus of soil. Six tests were made in two different sandy materials with different initial effective circumferential stresses. All tests were in first part deformation controlled like it is prescribed in mentioned Japanese standard. The assumption of an impact of anisotropic consolidation on the shear stiffness of soil planed to be confirmed. The second part of tests were stress controlled test in few steps to see what is the impact of different direction (shear, axial, shear and axial) of loading up on the response of soil. The specimens of one-granular sand were prepared after dry deposition method, while samples of sandy silt were prepared after sedimentation method.
Ključne besede (ePrints, sekundarni jezik):	Geotechnical;Soil Testing;Torsional Shear Test on Hollow Cylindrical Soil Specimens;dynamic shear modulus
ID:	8310886