Contact models and -discretizations for dry and saturated soils within dynamical applications

岩土工程施工过程及其对周围地区的影响需要一个建模程序，其中土壤和结构之间的接触必须被视为单边接触问题。在固体力学应用中，存在许多方法来表述和离散接触问题。在岩土工程应用中，有许多新的现象需要解决。正确的摩擦行为、与土壤复杂材料模型的相互作用以及饱和土流固耦合相互作用的公式仍然是具有挑战性的问题。尽管新的理论公式和复杂的离散化技术得到了发展，但仍然需要改进。特别是对于动力接触应用和桩在（部分）饱和土壤中安装的解决方案，必须开发包括液化效应在内的新公式。

Geotechnical construction processes and their influence on the surrounding area need a modelling procedure where the contact between soil and structure has to be treated as a unilateral contact prob-lem. Within solid mechanical applications there exist a lot of methods to formulate and discretize contact problems. For geotechnical applications a lot of new phenomena have to be solved. The correct friction behaviour, the interaction with the complex material models of the soil and the formulation of the coupled fluid solid interaction of saturated soils are still challenging issues. Although new theoretical formulations and complex discretization techniques were developed improvements are still required. Especially for dynamical contact applications and for the solutions of pile installation into (partly) saturated soils new formulations including liquefaction effects have to be developed.