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Main achievements:
· General Input on different levels of depth, based on existing knowledge and formulation of condition indicators known, but also known to be inefficient for a lot of boundary condition. Lots of indicators are used independently and most of the methods are based on empiric observations and some deterministic approaches. Effects of Time (e.g. changes of soil conditions due to an earthquake event as well as long term timing before - during and after) are usually not taken into consideration in evaluating risk.
· Therefore a critical review of those existing methods and the enhancement of knowledge for main indicators are crucial to be able to evaluate clear defined and mechanically valid condition indicators for soil.
· Condition indicator will include (which has not been done till now) the loading function (horizontal and overlaid vertical movement s) as well as local stress conditions e.g. different situations for different types of foundation.
· Achievements of new methods of identification of damage will allow describing changes in soil behavior and will be included into the formulation of the indicators.
Added value to the research field and society:
· Coupling the mechanical known indicators soil properties - loading function in less indicators being able to describe the influence of time on the liquefaction susceptibility and strength.
· Detailed study of silty soils, which are known but not studied in terms of liquefaction susceptibility.
· Studying the influence of multidirectional (horizontal and vertical acceleration and loading functions) earthquake by means of the SNF funded and worldwide unique dynamic Hollow Cylinder Apparatus of IGT.
· As a result of this we gain the ability to identify condition indicators of the soil in respect of their locations (e.g. below buildings) and the differences in the type of earthquake (shot type, continuous type) as well as location in three dimensional affected subsoil conditions (/e.g. basins) where vertical accelerations can exceed the horizontal (which is can be crucial for the soil) can be regarded.
· Interaction with WP 6 and WP3 in the "during an earthquake phase" lead to analyses procedure to judge critical and non critical changes in the ground condition (which will also be modeled in the HCA) for aftershock events and for the long term risk in the environment
· As a side effect of the laboratory testing reliability of sampling procedures for cyclic testing will be established so that effects related to the direct transfer of condition indicators evaluated in the laboratory to risk analysis procedure could be taken into account.
