By Th. Triantafyllidis
This conference introduced jointly specialists in cyclic soil behaviour with a purpose to talk about vital effects and new principles within the box, and to share services in layout of assorted difficulties regarding cyclic or dynamic behaviour of soils.
This book covers a number of topics:
* Theory and research, together with constitutive kin of soil below cyclic loading, post-seismic balance research of soil/structure, dynamic balance of constructions, liquefaction research of marine constructions because of cyclic loading, and more
* Cyclic and dynamic laboratory and version checking out, centrifuge trying out and in-situ checking out.
* Numerical research, together with desktop tools
* layout of industrial functions and marine buildings, set up equipment of piles, vibrocompaction, densification of ballast in railway buildings, case stories of earthquakes and post-liquefaction observations.
Read or Download Cyclic Behaviour of Soils and Liquefaction Phenomena: Proceedings of the International Conference, Bochum, Germany, 31 March - 2 April 2004 PDF
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Additional info for Cyclic Behaviour of Soils and Liquefaction Phenomena: Proceedings of the International Conference, Bochum, Germany, 31 March - 2 April 2004
And Tokimatsu, K. 1989. Liquefaction resistance of a partially saturated sand. Journal of the Japanese Geotechnical Society. Soils and Foundations. 29(2): 157–162. CONCLUSIONS To investigate the effects of partial saturation, multiple series of triaxial monotonic and cyclic loading tests were carried out in undrained condition on samples of clean sand prepared at varying densities and varying levels of saturation which is expressed in terms of B-value. The outcome of these tests is summarized as follows.
With respect to the velocity of the longitudinal wave (P-wave), field measurements have shown that it often yields values, which are approximately equal to or somewhat smaller than the P-wave velocity through water for the case of seemingly saturated loose soil deposits existing at depths below the ground water table. Shown in Figure 1 is the collection of in-situ data on the P-wave velocity monitored in Japan at a number of sites where the downhole logging was conducted. All the data are arranged by choosing the elevation of the ground water table as a datum, that is, as zero depth.
60 under otherwise identical conditions is demonstrated in Figure 5 where it may be seen that the number of cycles needed to reach the state of liquefaction was Nc = 48 which is significantly large as compared to the corresponding number in the previously mentioned test result shown in Figure 4. 6%. Note that the velocity of P-wave propagation is now VP = 721 m/sec. The data of this test is plotted in Figure 13 as indicated by point B. 09 at the beginning of the undrained loading is displayed in Figure 6.