TY - CONF A1 - Shamsuddoha,, Md A1 - Hüsken, Götz A1 - Pirskawetz, Stephan A1 - Baeßler, Matthias A1 - Kühne, Hans-Carsten A1 - Thiele, Marc T1 - Remediation of Cracks Formed in Grouted Connections of Offshore Energy Structures under Static Loads N2 - The future energy demand necessitates the exploration of all potential energy sources both onshore and offshore. Global trend has shifted towards offshore energy, which can be obtained from either carbon intensive or renewable options, hence requiring structures such as rigs, platforms, and monopiles. Most of these structures adopt easily installable construction techniques, where lower foundation need to be connected with the super structure by mean of grouted composite joints. Generally, these composite connections have exterior sleeve, interior pile and infill grout. Being located in remote offshore conditions, connections can experience considerable adverse loading during their lifetimes. Degradations were reported inside similar connections, which were installed in last three decades. Besides, grouting in the offshore sites may often be proven difficult, which eventually leads to reduced capacity of connections in the long run. Thus, repair and rehabilitation of such connections should be planned ahead to minimize operational delays and costs in the future. This study aims at characterizing the nature of crack generation in grouted connections and thereby identifying the potential of repair using suitable repair material. Scaled grouted joints were manufactured using a novel mold, and connections were loaded under static load to visualize the main failure pattern. The failure mechanism and loading capacity are found compatible to previous results from earlier literature. Grouted connection was then repaired using cementitious injectable grout. The effectiveness of the repair system is also discussed. T2 - Twenty-eighth (2018) International Ocean and Polar Engineering Conference CY - Sapporo, Japan DA - 10.06.2018 KW - Offshore KW - Energy KW - Grouted Connection KW - Cracks KW - Repair KW - Rehabilitation PY - 2018 SP - 120 EP - 126 AN - OPUS4-45227 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Kullolli, Borana A1 - Stutz, H. A1 - Bronsert, Jeffrey A1 - Dutto, Paola A1 - Baeßler, Matthias ED - Onate, E. ED - Owen, D. R. J. ED - Peric, D. ED - Chiumenti, M. T1 - A contact problem aplication for the local behaviour of soil pile interaction N2 - The purpose of the work presented in this paper is to analyze locally (at the element level) the contact behavior of a soil-pile contact problem. Therefore, a 2D shear test is modeled using the Finite Element Method. The formulation of a 4 nodded zero-thickness interface element of Beer is chosen with a linear interpolation function. Four constitutive contact models adapted for contact problems have been implemented. The Mohr-Coulomb and Clough and Duncan models were chosen initially, due to the ease of implementation and few number of parameters needed. After, more complicated models in the framework of elasto-plasticity such as: Lashkari and Mortara were implemented for the first time into the finite element code of the shear test problem. They include other phenomena such as: relative density of soil, the stress level and sand dilatancy. From the results the relation between shear displacement and shear stress has been deduced. Finally, a discussion of the advantages and the drawbacks during computation of each model is given at the end. T2 - Conference CY - Barcelona, Spain DA - 05.09.2017 KW - Soil-pile interaction KW - Numerical modelling PY - 2017 SN - 978-84-946909-6-9 SP - 490 EP - 501 PB - CIMNE CY - Barcelona,Spain AN - OPUS4-42960 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Baeßler, Matthias T1 - Aktivitäten der BAM zu Offshore-Windenergie N2 - Die BAM ist in vielen Bereich zum Thema Ausbau Windenergie, insbesondere für den Offshore-Bereich aktiv. Die Aktivitäten werden exemplarisch für die Tätigkeiten im Bereich FE, PAZ und BI dargestellt. Anlass war eine Zusammenkunft mit dem Verband der Betreiber (AGOW) T2 - Erfahrungsaustausch AGOW-BAM CY - BAM, Berlin, Germany DA - 24.01.2018 KW - Offshore-Wind PY - 2018 AN - OPUS4-43991 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Baeßler, Matthias T1 - Recap: Main Results of the BUMP Study and Relevance for VERBATIM N2 - Zusammenfassung des Forschungsprojekts BUMP hinsichtlich der Relevanz für das Projekt VERBATIM N2 - BUMP had been a theoretical prestudy on open issues for the pile tip buckling of large monopiles. The presentation summarizes the main results and considers the impact for the ongoing VERBATIM project. VERBATIM is set up as a mainly experimental verification project for pile buckling. T2 - Kick-Off Projekt VERBATIM CY - BAM, Berlin, Germany DA - 23.01.2020 KW - Buckling piles circular shells PY - 2020 AN - OPUS4-50515 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Baeßler, Matthias A1 - Rücker, Werner ED - Popp, K. ED - Schiehlen, W. O. T1 - Track Settlement Due to Cyclic Loading with Low Minimum Pressure and Vibrations PY - 2003 SN - 3-540-43892-0 N1 - Serientitel: Lecture notes in applied mechanics – Series title: Lecture notes in applied mechanics VL - 6 IS - 6 SP - 337 EP - 356 PB - Springer CY - Berlin AN - OPUS4-1666 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Rücker, Werner A1 - Auersch, Lutz A1 - Baeßler, Matthias A1 - Knothe, K. A1 - Wu, Y. A1 - Gerstberger, Ulf A1 - Popp, K. A1 - Kruse, H. A1 - Savidis, S. ED - Popp, K. ED - Schiehlen, W. O. T1 - A comparative study of results from numerical track-subsoil calculations T2 - Colloquium 2002 CY - Stuttgart, Germany DA - 2002-03-13 PY - 2003 SN - 3-540-43892-0 N1 - Serientitel: Lecture notes in applied mechanics – Series title: Lecture notes in applied mechanics IS - 6 SP - 471 EP - 488 PB - Springer CY - Berlin AN - OPUS4-2358 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Baeßler, Matthias T1 - Experimentelle Untersuchungen zur dynamischen Stabilität des Schottergleises auf Brücken T2 - Projektausschussitzung "Setzungsverhalten auf Brücken" (Vh 7229), BAM CY - Berlin, Germany DA - 2004-03-11 PY - 2004 AN - OPUS4-3408 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Baeßler, Matthias T1 - Fortschritt der experimentellen Untersuchungen zum Schotteroberbau auf Brücken T2 - 3. Projektausschusssitzung "Schotteroberbau auf Brücken" am Institut für Mechanik der Uni Hannover CY - Hanover, Germany DA - 2004-07-15 PY - 2004 AN - OPUS4-5402 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Baeßler, Matthias T1 - Zur Problematik des Schotteroberbaus auf Eisenbahnbrücken in Schnellfahrstrecken T2 - VDEI-Fachtagung BahnBau CY - Berlin, Germany DA - 2004-11-21 PY - 2004 AN - OPUS4-5403 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Baeßler, Matthias T1 - Untersuchungen zum Sackungsverhalten des Schottergleises T2 - Kolloquium der Arbeitsgruppe Untergrund im DFG Schwerpunktprogramm Systemdynamik und Langzeitverhalten von Fahrwerk, Gleis und Untergrund Universität Karlsruhe (TH) CY - Karlsruhe, Germany DA - 2001-10-16 PY - 2001 AN - OPUS4-6564 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Baeßler, Matthias T1 - Track settlement due to cyclic loading with low minimum pressure and vibrations T2 - Abschlusskolloquium zum DFG-Schwerpunktprogramm "System Dynamics and Long-Term Behaviour of Railway Vehicles, Track and Subgrade" CY - Stuttgart, Germany DA - 2002-03-13 PY - 2002 AN - OPUS4-6573 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Baeßler, Matthias T1 - Benchmarktest zum Fahrweg-Untergrund-System T2 - Kolloquium der Arbeitsgruppe Untergrund im DFG Schwerpunktprogramm Systemdynamik und Langzeitverhalten von Fahrwerk, Gleis und Untergrund Universität Karlsruhe (TH) CY - Karlsruhe, Germany DA - 2001-10-16 PY - 2001 AN - OPUS4-6571 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -