000018339 001__ 18339
000018339 005__ 20170118182218.0
000018339 04107 $$aeng
000018339 046__ $$k2017-01-09
000018339 100__ $$aUrano, Michihiro
000018339 24500 $$aStudy on the Damage Due To Sloshing of Liquefied Ground in Chiba City During the Great East Japan Earthquake

000018339 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000018339 260__ $$b
000018339 506__ $$arestricted
000018339 520__ $$2eng$$aThe Great East Japan Earthquake on March 11, 2011 caused severe damage, particularly to the strip of land along the Pacific Ocean from the Tohoku Region to the Kanto Region. In the Tokyo Bay Area, widespread liquefaction destroyed a large number of wooden houses, pushed up road pavements, and damaged water and gas pipes and manholes. The liquefied ground shook repeatedly and the duration of shaking was long—the Great East Japan Earthquake lasted 3–4 minutes. After the earthquake, a field survey was conducted, targeting the liquefied areas at landfill land with low soil strength such as the landfill of the Tokyo Bay area to correlate ground motion intensity and damage severity. Liquefaction at the bottom layers occurred in inclined or irregular ground surfaces and buckling are common near this boundary. To investigate the mechanism of sloshing, twodimensional seismic response analysis was conducted for areas where damage has occurred in Chiba using FLUSH, a two-dimensional FEM analysis. The shear modulus was reduced to 1/50, 1/100, and 1/200 of typical values. Consequently, the large compressive and tensile strains in the horizontal direction at shallow depth near the road buckling were reproduced at low G values, i.e., 1/100 and 1/200 of typical values. Large compressive and horizontal strain were observed near the boundaries of areas that were not affected by liquefaction within the liquefaction-affected area. Because of the long duration of ground shaking, the nonliquefied and liquefied layers repeatedly collide; consequently, large strains in the horizontal direction occurred.

000018339 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000018339 653__ $$aGreat East Japan Earthquake, Liquefaction, Seismic response analysis

000018339 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000018339 720__ $$aUrano, Michihiro$$iYasuda, Susumu$$iIshikawa, Keisuke
000018339 8560_ $$ffischerc@itam.cas.cz
000018339 8564_ $$s973670$$uhttps://invenio.itam.cas.cz/record/18339/files/1261.pdf$$yOriginal version of the author's contribution as presented on USB, paper 1261.
000018339 962__ $$r16048
000018339 980__ $$aPAPER