Liquefaction of soils in the light of applied mechanics
DOI:
https://doi.org/10.14195/2184-8394_128_1Keywords:
Cyclic and static liquefaction, Critical states, Seismic wavesAbstract
The advantage of looking at soil liquefaction as an elastoplastic mechanical behaviour that is well modelled by critical state concepts is well accepted, while recognising that it takes places in a wide range of materials and conditions. These issues are outlined in this paper, as the critical state framework has now been extended to other materials apart from sands. This approach integrates the knowledge of the influence of the micromechanics of particles and their contacts on the observed behaviour, and takes into account the effects of continued particle breakage and change in uniformity. The objectives of performance-based design are presented in the light of laboratory and field tests that permit to identify the risk of triggering both cyclic and static liquefaction. It is also discussed how those tests can be performed and their results interpreted to predict these phenomena, under a global mechanical modelling approach.
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