20.500.12556/DKUM-70693 Measurement and interpretation of the small strain stifness of Boštanj silty sand Merjenje in interpretacija togosti meljastega peska iz Boštanja pri zelo majhnih deformacijah This paper presents measurements, and an interpretation of these measurements, based on the use of bender-element probes for Boštanj silty sand. The samples were prepared at different initial void ratios and isotropically compressed up to 5 MPa. The bender-element technique was used to determine the dynamic shear modulus ($G_0$) of the soils at very small strains. The multiple bender-element probes were shot at different excitation frequencies in order to increase the reliability of the measurements. The $G_0$ stiffness was determined by using three different techniques: a) the first-time arrival, b) the phase-change method and c) the cross-correlation method. The systematic differences observed between the $G_0$ values, calculated using the three techniques, are discussed. The variation of $G_0$ in the log$G_0$ - log$p'$ plane was evaluated for the Boštanj silty sand and compared with other sands. V članku je predstavljeno merjenje in interpretacija meritev z bender elementi na meljastem pesku iz Boštanja. Vzorci so bili pripravljeni pri različnih začetnih količnikih por in obremenjeni v izotropni kompresiji do 5MPa. Tehniko merjenja z bender elementi smo uporabili za določitev dinamičnega strižnega modula ($G_0$) materiala pri zelo majhnih deformacijah. Zanesljivost meritev smo povečali z uporabo skupine signalov z različnimi frekvencami vzbujanja. Togost $G_0$ je bila določena z uporabo treh različnih pristopov, in sicer: a) časovnega prihoda vala, b) spremembe faze in c) navzkrižne korelacije. V članku so pojasnjene razlike med vrednostmi $G_0$ glede na uporabo določenega pristopa, ki so se sistematično pojavljale. Prikazano je spreminjanje togosti $G_0$ meljastega peska iz Boštanja v ravnini log$G_0$ - log$p'$ in primerjave z drugimi peski. silty sand triaxial testing small strain stiffness bender elements time-domain and frequency-domain measurements meljast pesek triosne preiskave togost pri zelo majhnih deformacijah bender elementi meritve v časovni in frekvenčni domeni true false true Angleški jezik Slovenski jezik Fakulteta za gradbeništvo, prometno inženirstvo in arhitekturo Univerze v Mariboru Znanstveno delo 2018-06-06 11:44:53 2018-06-06 11:45:42 2022-08-01 19:41:27 2019-07-11 18:16:25 2009 0 0 str. 57-75 št. 2 Letn. 6 2009 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1854-0171 624 215987712 1577831 1854-0171 URN:SI:UM:DK:NYSUHW5T Acta_geotechnica_Slovenica_2009_Vilhar,_Jovicic_Measurement_and_interpretation_of_the_small_strain_stifness_of_Bostanj_silty_sand.pdf Acta_geotechnica_Slovenica_2009_Vilhar,_Jovicic_Measurement_and_interpretation_of_the_small_strain_stifness_of_Bostanj_silty_sand.pdf 1 CA9FDF6565BAF9229187ACFA2B8DEFE1 89de6d12da09c8468a99b773a7e331994ae0eb973494ebbdc7c418768577e200 0145160d-7c10-11eb-bb7a-00155d0001ca 20.500.12556/dkum/e885f3d7-f16a-4cc8-839e-16a03b75716a https://dk.um.si/Dokument.php?lang=slv&id=125338 http://fgserver3.fg.um.si/journal-ags/2009-2/article-5.asp 1 https://dk.um.si/Dokument.php?lang=slv&id=125337 Fakulteta za gradbeništvo, prometno inženirstvo in arhitekturo Acta geotechnica Slovenica 0 0 0