Jürgens, HaukeHaukeJürgensVogel, PaulPaulVogelHenke, SaschaSaschaHenkeGrabe, JürgenJürgenGrabe2022-09-142022-09-142022-09Geotechnik 45 (3): 155-169 (2022-09)http://hdl.handle.net/11420/13599For the numerical calculation of the stability of structures in soil. The use of the finite element method (FEM) for the design and recalculation of geotechnical structures is steadily increasing. For both slopes and retaining walls, the advantages of the FEM are already used for accurate determination of the deformations and stresses of structures in the serviceability limit state (SLS). The application in the ultimate limit state (ULS) is currently still a research topic for structures with soil-structure interaction, such as retaining walls. An extended strength reduction, where component strength is reduced in addition to the shear parameters of the soil, is intended to account for the influence of the structure in ULS-simulations. In addition to the component strength, other parameters, such as the external load-bearing capacity of anchors or the contact friction between soil and component, play a role for determination of the governing failure mechanism. Using a Python script, the strength reduction approach implemented in PLAXIS 2D is re-implemented and verified exemplarily on a braced excavation pit and a tie-back quay wall. By extending the own strength reduction implementation with additional parameters, which are relevant for the stability of geotechnical structures, their influence on the stability calculation and the resulting failure mechanisms is investigated.de0172614520223155169Calculation methodsexcavation pitsExcavationsFEMNumerical methodsPython-Scriptingquay wallsSoil-structure interactionsoil-structure-interactionstrength reductionJournal Article10.1002/gete.202200003Other