PT Unknown AU Stutz, HH TI Hypoplastic Models for Soil-Structure Interfaces: Modelling and Implementation SE Schriftenreihe des Lehrstuhls Geomechanik und Geotechnik PY 2016 VL 2 PU Christian-Albrechts-Universität zu Kiel WP https://macau.uni-kiel.de/receive/diss_mods_00020008 LA en DE Soil- structure interface; Hypoplasticity; Contact mechanics; Numerical modelling; Boden-Bauwerkskontakt; Hypoplastizität; Kontaktmechanik; Numerische Modellierung; Geomechanik; Geotechnik SN 2943-0364 AB The consideration of interfaces is an important issue when modelling the holistic global structural behaviour of geotechnical engineering structures. The most prominent example is the shaft friction of axial loaded piles and anchors. In this thesis, a stochastic assessment scheme was proposed and applied. This scheme was modified to take into account the special considerations for the assessment of interface models. Based on the assessment and a state-of-the-art review, theoretical considerations were used and a novel scheme was developed. This scheme uses reformulated mathematical operators as well as reduced stress and strain rate tensors, based on existing constitutive equations, to model interfaces. Shear stress mobilization and the volumetric behaviour are predicted more accurately, and the bearing behaviour of frictional contacts can be modelled in a better way. By using the novel scheme, an older hypoplastic interface model for granular interfaces was enhanced, and three different hypoplastic clay interface models were proposed. In addition to the theoretical constitutive model formulation, an implementation method was developed. This allowed a user-friendly implementation of advanced constitutive models as interface models using the capabilities of a commercial finite element software package. This concept was exemplary applied to various 3D boundary value problems and the benefits of such advanced hypoplastic interface model are discussed. PI Kiel ER