Dokument-ID Dokumenttyp Autoren/innen Persönliche Herausgeber/innen Haupttitel Abstract Auflage Verlagsort Verlag Herausgeber (Institution) Erscheinungsjahr Titel des übergeordneten Werkes Jahrgang/Band ISBN Veranstaltung Veranstaltungsort Beginndatum der Veranstaltung Enddatum der Veranstaltung Ausgabe/Heft Erste Seite Letzte Seite URN DOI Lizenz Datum der Freischaltung OPUS4-31352 Vortrag Auersch, Lutz Durch Schienenverkehr angeregte Wellenausbreitung durch den Boden - Stand der Simulationsmethoden 2014 Werkstattgespräch "Simulation von Vibration und Schall im Verkehrswesen" Werkstattgespräch "Simulation von Vibration und Schall im Verkehrswesen" Cologne, Germany 2014-09-10 2014-09-10 2016-02-20 OPUS4-31284 Vortrag Auersch, Lutz Amplification and reduction phenomena of soil-building interaction by finite-element boundary-element calculations and simplefied methods 2014 Ninth European Conference on Structural Dynamics (EURODYN 2014) Ninth European Conference on Structural Dynamics (EURODYN 2014) Oporto, Portugal 2014-06-30 2014-07-02 2016-02-20 OPUS4-31285 Vortrag Auersch, Lutz The dynamic behavior of railway tracks with under sleeper pads, finite-element boundary-element model calculations, laboratory tests and field measurements 2014 Nith European Conference on Structural Dynamics (EURODYN 2014) Nith European Conference on Structural Dynamics (EURODYN 2014) Oporto, Portugal 2014-06-30 2014-07-02 2016-02-20 OPUS4-30494 Zeitschriftenartikel Auersch, Lutz The use and validation of measured, theoretical, and approximate point-load solutions for the prediction of train-induced vibration in homogeneous and inhomogeneous soils The layered soil is calculated in the frequency wavenumber domain and the solutions for fixed or moving point or track loads follow as wavenumber integrals. The resulting point load solutions can be approximated by simple formula. Measurements yield the specific soil parameters for the theoretical or approximate solutions, but they can also directly provide the point-load solution (the transfer function of that site). A prediction method for the train-induced ground vibration has been developed, based on one of these site-specific transfer functions. The ground vibrations strongly depend on the regular and irregular inhomogeneity of the soil. The regular layering of the soil yields a cut-on and a resonance phenomenon, while the irregular inhomogeneity seems to be important for high-speed trains. The attenuations with the distance of the ground vibration, due to point-like excitations such as vibrator, hammer, or train-track excitations, were investigated and compared. All theoretical results were compared with measurements at conventional and high-speed railway lines, validating the approximate prediction method. St. Petersburg, Russia International Institute of Acoustics and Vibration 2014 International journal of acoustics and vibration 19 1 52 64 2016-02-20 OPUS4-31579 Zeitschriftenartikel Auersch, Lutz; Romero, A.; Galvín, y P. Respuesta dinámica de edificaciones producida por campos de ondas incidentes considerando la interacción suelo-estructura En este artículo se presentan 2 metodologías basadas en las formulaciones del Método de los Elementos de Contorno y del Método de los Elementos Finitos para estudiar el efecto de la interacción suelo-estructura en el comportamiento dinámico de edificaciones. Se ha estudiado la respuesta de un edificio de 3 plantas producida por un campo de ondas incidente con los 2 métodos propuestos. Los resultados obtenidos presentan un buen grado de acuerdo entre ellos. A partir de estos resultados se ha validado un modelo aproximado para estudiar este tipo de problemas y se han examinado diferentes tipologías de edificaciones. Las conclusiones alcanzadas muestran que la respuesta global de las estructuras se debe a la deformación de los forjados y depende de su superficie, de las condiciones de apoyo y del acoplamiento con los forjados de la misma planta. Del mismo modo, se ha observado un acoplamiento del comportamiento de pilares y forjados cuando las rigideces de ambos son similares.----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- This paper presents 2 methodologies based on the Boundary Element Method and the Finite Element Method to study soil-structure interaction effect on building behaviour. A 3-story building response induced by an incident wave field is studied using both methods. The results obtained show a good agreement. Then, a simplified model is validated from these methods and several buildings are analysed. Conclusions show that structural responses are due to floor deformation, and depend on their area, support conditions and coupling. A coupling between floors and columns when both elements have similar stiffness is also observed. Barcelona Univ. Universitat Politécnica de Catalunya 2014 Revista internacional de métodos numéricos para cálculo y diseño en ingeniería 30 4 256 263 10.1016/j.rimni.2013.09.001 2016-02-20 OPUS4-31163 Beitrag zu einem Tagungsband Auersch, Lutz Cunha, A.; Caetano, E.; Ribeiro, P.; Müller, G. Amplification and reduction phenomena of soil-building interaction by finite-element boundary-element calculations and simplified methods Vibration of normal apartment, office and production buildings, which are excited by technically induced ground vibrations are considered. Many wavelengths of the Rayleigh waves of the soil fit into the foundation dimensions. The related high discretization effort can nowadays be realized with detailed soil-structure interaction method. The combined finite-element boundary-element method is used here as a detatiled method. Simplified method can be used with less computation time, but these methods must be calibrated by exact results. One simplification is to extent the structure to infinity and to solve the problem by wavenumber domain methods. Another simplification is the use of a Winkler soil instead of the continuous soil. Usually, the Winkler parameters are not only soil parameters but depend also on the rigid or flexible foundation structure. Substructure methods use commercial FEM software for the building part. The contribution will show some detailed and some simplified results on large structural elements such as foundation plates, walls, storey plates on columns as well as results on complete buildings. The reduction of the ground vibration by stiff elements and the amplification due to floor or building resonances are discussed which are the most important phenomena of the soil-building interaction. 2014 EURODYN 2014 - 9th International conference on structural dynamics (Proceedings) 978-972-752-165-4 EURODYN 2014 - 9th International conference on structural dynamics Porto, Portugal 30.06.2014 02.07.2014 591 597 2016-02-20 OPUS4-31164 Beitrag zu einem Tagungsband Auersch, Lutz; Said, Samir; Knothe, Esther; Rücker, Werner Cunha, A.; Caetano, E.; Ribeiro, P.; Müller, G. The dynamic behavior of railway tracks with under sleeper pads, finite-element boundary-element model calculations, laboratory tests and field measurements A variety of isolation measures exists to reduce the vibration in the neighbourhood of railway lines. They can be roughly classified as elastic or stiffening systems. There are the following elastic elements, rail pads or resilient fixation systems between rail and sleeper, under sleeper pads or sleeper shoes under the sleepers, and ballast mats under the ballast. Stiffening systems (plates) are used as slab tracks, floating slab tracks, or mass-spring systems. In the EU project "Railway induced vibration abatement solutions (RIVAS)", elastic under sleeper pads have been investigated. The dynamic behaviour of the track and the surrounding soil has been calculated by the combined finite-element boundary-element method in a systematic parameter study. It has been shown that the mitigation effect can be improved by soft under sleeper pads or by heavy sleepers. Consequently, such track elements (soft under sleeper pads and heavy sleepers) have been thoroughly investigated in laboratory tests to establish the static and dynamic parameters as well as their serviceability. Finally, field tests at and near railway tracks with and without under sleeper pads have been performed. To determine the reduction effect of the isolated track, the ground vibrations excited by trains or artificial sources have been measured. The soil properties at the different sites have also been measured so that the comparison of the isolated and un-isolated track can take into account possible differences of the soil parameters. The contribution shows how the different (numerical, laboratory and field) methods and results can be combined to achieve an improved mitigation solution with soft under sleeper pads and heavy sleepers for ballasted and slab tracks. 2014 EURODYN 2014 - 9th International conference on structural dynamics (Proceedings) 978-972-752-165-4 EURODYN 2014 - 9th International conference on structural dynamics Porto, Portugal 30.06.2014 02.07.2014 805 812 2016-02-20