000019928 001__ 19928
000019928 005__ 20170118182347.0
000019928 04107 $$aeng
000019928 046__ $$k2017-01-09
000019928 100__ $$aMikami, Kazuhisa
000019928 24500 $$aSimilarity Law in Model Ground Tests Focused on Shear Modulus Under Low Confining Stress

000019928 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000019928 260__ $$b
000019928 506__ $$arestricted
000019928 520__ $$2eng$$aIt is popular that model ground tests concerning dynamic problems are conducted under 1g gravitational condition. In those model tests, the similarity law is very important to predict the actual behavior of the real ground. Experimental results, where shear moduli of soils are proportional to the square root of confining stress (here, this is referred to as “square root law of G”), have been frequently available for making a similarity law. This experimental assumption is mainly examined in soil element tests under quite high confining stress comparing with small model ground tests. However, there is little data concerning the shear modulus under extremely low confining stress because of the difficulty of soil element tests under low confining stress conditions. Therefore, shear modulus was estimated under low confining stress conditions using bender elements (BE) not only in the triaxial tests but also in the model ground in this study. Moreover, the shear wave generated by plate hitting is also used to evaluate the shear modulus of soil in the model ground. The shear moduli at various confining stress level are measured using BE and plate hitting in soil container and triaxial tests. There was a good agreement in the shear moduli obtained from the BE tests using the triaxial apparatus and the soil container. However, the shear moduli obtained from the plate hitting method were larger than those from the BE tests. Finally, it was demonstrated that the assumption of “square root law of G” is roughly established under low confining stress although small difference appears in the type of experiments.

000019928 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000019928 653__ $$alow confining stress; shear modulus; similarity law

000019928 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000019928 720__ $$aMikami, Kazuhisa$$iTakada, Susumu$$iToyota, Hirofumi
000019928 8560_ $$ffischerc@itam.cas.cz
000019928 8564_ $$s510139$$uhttps://invenio.itam.cas.cz/record/19928/files/471.pdf$$yOriginal version of the author's contribution as presented on USB, paper 471.
000019928 962__ $$r16048
000019928 980__ $$aPAPER