TY - CONF A1 - Hille, Falk A1 - Döhler, M. A1 - Mevel, L. A1 - Rücker, Werner ED - De Roeck, G. ED - Degrande, G. ED - Lombaert, G. ED - Müller, G. T1 - Subspace-based damage detection methods on a prestressed concrete bridge N2 - For the last decades vibration based damage detection of engineering structures has become an important issue for maintenance operations on transport infrastructure. Research in vibration based structural damage detection has been rapidly expanding from classic modal parameter estimation to modern operational monitoring. Methodologies from control Engineering especially of aerospace applications have been adopted and converted for the application on civil structures. Here the difficulty is to regard to the specific environmental and operational influence to the structure under observation. A null space based damage detection algorithm is tested for its sensitivity to structural damage of a prestressed concrete road bridge. Specific techniques and extensions of the algorithm are used to overcome difficulties from the size of the structure which is associated with the number of recorded sensor channels as well as from the operational disturbances by a nearby construction site. It can be shown that for concrete bridges the proposed damage detection methodology is able to clearly indicate the presence of structural damage, if the damage leads to a significant change of the structural system. Small damage which do not result in a System change when not activated by loading, do not lead to a modification of the dynamic response behavior and for that cannot be detected with the proposed global monitoring method. T2 - EURODYN 2011 - 8th International conference on structural dynamics CY - Leuven, Belgium DA - 04.07.2011 KW - Subspace methods KW - Fault detection KW - Monitoring techniques KW - Concrete bridge PY - 2011 SN - 978-90-760-1931-4 IS - MS12 TUE 11:45 SP - 2304 EP - 2310 AN - OPUS4-24689 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Rücker, Werner T1 - Forschungsaktivitäten BAM 7.2 im Bereich Windenergieanlagen T2 - Workshop "Interaktionsmodelle für Windenergieanlagen" CY - Berlin, Germany DA - 2013-11-01 PY - 2013 AN - OPUS4-29491 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CHAP A1 - Döhler, Michael A1 - Hille, Falk A1 - Mevel, L. A1 - Rücker, Werner T1 - Estimation of modal parameters and their uncertainty bounds from subspace-based system identification N2 - An innovative and efficient algorithm to estimate the modal Parameters and their uncertainties from subspace-based System identification has been developed. Applications to Output only measurements have been demonstrated on the S101 Bridge case. PY - 2013 SN - 978-3-200-03179-1 IS - Chapter 5 SP - 91 EP - 106 CY - Vienna, Austria AN - OPUS4-29906 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Döhler, Michael A1 - Hille, Falk A1 - Mevel, L. A1 - Rücker, Werner T1 - Structural health monitoring with statistical methods during progressive damage test of S101 Bridge N2 - For the last decades vibration based damage detection of engineering structures has become an important issue for maintenance operations on transport infrastructure. Research in vibration based structural damage detection has been rapidly expanding from classic modal parameter estimation to modern operational monitoring. Since structures are subject to unknown ambient excitation in operation conditions, all estimates from the finite data measurements are of statistical nature. The intrinsic uncertainty due to finite data length, colored noise, non-stationary excitations, model order reduction or other operational influences needs to be considered for robust and automated structural health monitoring methods. In this paper, two subspace-based methods are considered that take these statistical uncertainties into account, first modal parameter and their confidence interval estimation for a direct comparison of the structural states, and second a statistical null space based damage detection test that completely avoids the identification step. The performance of both methods is evaluated on a large scale progressive damage test of a prestressed concrete road bridge, the S101 Bridge in Austria. In an on-site test, ambient vibration data of the S101 Bridge was recorded while different damage scenarios were introduced on the bridge as a benchmark for damage identification. It is shown that the proposed damage detection methodology is able to clearly indicate the presence of structural damage, if the damage leads to a change of the structural system. KW - Subspace methods KW - Operational modal analysis KW - Uncertainty bounds KW - Damage detection KW - Prestressed concrete bridge PY - 2014 DO - https://doi.org/10.1016/j.engstruct.2014.03.010 SN - 0141-0296 VL - 69 SP - 183 EP - 193 PB - Elsevier CY - Oxford AN - OPUS4-30665 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Baeßler, Matthias A1 - Rücker, Werner ED - Pombo, J. T1 - A distinction between cyclically and dynamically loaded ballasted track N2 - This paper presents the impact of dynamic loading on the deterioration of ballasted track. Firstly it is discussed which types of loading can be observed at the track. The effects of cyclic and dynamic loading on the ballast assembly are discussed with respect to the different boundary conditions of physical model tests compared to those existing in reality. For dynamic loading, on the one hand, the displacements and rotations of single particles at the surface become more important. On the other hand, the load distribution caused by an impact like loading is different from a quasistatic loading. Finally, large scale tests are presented. When comparing the dynamic loading sequences with the solely cyclic loading, limits are found for a vibration level that is associated with an accelerated accumulation of permanent deformations. T2 - 2nd International conference on railway technology: research, development and maintenance CY - Korsika, France DA - 07.04.2014 KW - Ballast KW - Cyclic loading KW - Dynamic loading KW - Vibrations KW - Track deterioration PY - 2014 SN - 978-1-905088-59-1 DO - https://doi.org/10.4203/ccp.104.132 SP - Paper 132, 1 EP - 21 PB - Civil Comp Press AN - OPUS4-30944 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Hille, Falk A1 - Petryna, Y. A1 - Rücker, Werner T1 - Subspace-based detection of fatigue damage on jacket support structures of offshore wind turbines N2 - The paper describes the application of the Stochastic Subspace-based Damage Detection (SSDD) method on model structures for an utilization of this approach on offshore wind turbine structures. Aim of the study was therefore to analyze the usability and efficiency of the detection method as well as to determine an optimized set of parameter for realistic damage on support structures of wind energy turbines. Based on results of an experimental fatigue test on a Steel frame laboratory structure a strategy for a numerical verification of the experimentally evolved damage detection was developed, utilizing a time integration approach to simulate the dynamic response. In a second Step the identified modeling and computing methodology is used to numerically investigate the ability to detect damage in real size structural components of offshore wind turbines. T2 - EWSHM 2014 - 7th European workshop on structural health monitoring CY - Nantes, France DA - 08.07.2014 KW - Damage detection KW - Offshore wind turbines KW - Numerical response PY - 2014 SP - 229 EP - 236 AN - OPUS4-31218 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Hille, Falk A1 - Petryna, Y. A1 - Rücker, Werner ED - Cunha, A. ED - Caetano, E. ED - Ribeiro, P. ED - Müller, G. T1 - Subspace-based detection of fatigue damage on a steel frame laboratory structure for offshore applications N2 - Altematively to common modal analysis as tool for detectmg changes between a reference and an actual (possibly damaged) structural state, the subspace-based damage detection method has been developed in recent years and successfully adopted to test application data sets. Characteristic for that method is that instead of analyzing modal parameters, a Statistical test with respect to changes of a dynamic signature of structural response is introduced. Therefor, a Gaussian residual vector is extracted from the subspace of an output only Vibration data covariance matrix within the reference state. The paper describes the application of this damage detection method within a laboratory fatigue test on a Steel frame structure. Aim of the investigation was to analyze the usability and efficiency of the detection method for realistic damage on carrying structures of wind energy turbines. In a second Step, a numerical model of the lab test structure is developed and validated. Thus, a comparable numerical Simulation of the fatigue damage detection was feasible and the accuracy of the Simulation procedure could be verified. The present study describes the first Step in a two-step approach for quantifying and optimizing fundamental characteristics of SHM Systems for offshore wind turbine structures concerning a required number of sensors and their optimal location. T2 - EURODYN 2014 - 9th International conference on structural dynamics CY - Porto, Portugal DA - 30.06.2014 KW - Damage detection KW - Offshore wind energy KW - Subspace-based detection KW - Schadensdetektion KW - Offshore-Windenergie KW - Subspace-basierte Verfahren PY - 2014 UR - http://paginas.fe.up.pt/~eurodyn2014//CD/papers/506_MS25_ABS_1788.pdf SN - 978-972-752-165-4 SN - 2311-9020 SP - MS25, 3595 EP - 3602 AN - OPUS4-31219 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - RPRT A1 - Rücker, Werner T1 - Dynamische Wechselwirkung eines Schienen-Schwellensystems mit dem Untergrund N2 - Entwickelt wird ein Ersatzsystem für die Dynamik eines Schienenschwellenrostes als Fahrbahn schnellfahrender Züge, das über den Schienen und über den Boden gekoppelt ist. Für Schienen und Schwellen entstand ein dreidimensionales Ersatzsystem auf der Basis der finiten Elemente. Damit werden Grundlagen für exaktes Messen dynamischer Wechselwirkungen geschaffen. T3 - BAM Forschungsberichtreihe - 78 KW - Eisenbahnoberbau KW - Schwingungsbeanspruchung PY - 1981 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-3723 SN - 0938-5533 VL - 78 SP - 1 EP - 128 PB - Bundesanstalt für Materialprüfung (BAM) CY - Berlin AN - OPUS4-372 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - RPRT A1 - Kohl, Christian A1 - Rücker, Werner T1 - Integration der Untergrunddynamik in das Programmsystem MEDYNA am Beispiel des Intercity Experimental (ICE) N2 - Entwicklung eines Oberbaumoduls, das aus den elastischen Schienen, den Zwischenlagen zwischen Schienen und Schwellen, den Schwellen sowie dem eigentlichen Untergrund, der als linear elastischer Halbraum modelliert wird, besteht. Als Besonderheit wird hier die Wellenausbreitung im Untergrund berücksichtigt. Zur Verifikation dieses Modells wurden Eigenfrequenzen, -formen und Frequenzgänge verschiedener Fahrzeug-/ Fahrwegmodelle auf der Basis des Hochgeschwindigkeitszuges ICE berechnet. T3 - BAM Forschungsberichtreihe - 169 KW - MKS-Systeme KW - Bodendynamik KW - Fahrzeug-Fahrweg-Dynamik KW - Fete Fahrbahn KW - Erschütterungsausbreitung PY - 1990 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-2810 SN - 978-3-88314-959-4 SN - 0938-5533 VL - 169 SP - 1 EP - 119 PB - Wirtschaftsverlag NW CY - Bremerhaven AN - OPUS4-281 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - RPRT A1 - Rücker, Werner T1 - Ermittlung der Schwingungserregung beim Betrieb schienengebundener Fahrzeuge in Tunneln sowie Untersuchung des Einflusses einzelner Parameter auf die Ausbreitung von Erschütterungen im Tunnel und dessen Umgebung N2 - Auswirkungen einzelner Systemparameter auf das Frequenz- und Amplitudenverhalten des Tunnels und die Art und Weise der Schwingungsausbreitung werden dargestellt. T3 - BAM Forschungsberichtreihe - 64 PY - 1980 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-3866 SN - 0938-5533 VL - 64 SP - 1 EP - 178 PB - Bundesanstalt für Materialprüfung (BAM) CY - Berlin AN - OPUS4-386 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Hu, Wei-Hua A1 - Said, Samir A1 - Rohrmann, Rolf A1 - Rücker, Werner A1 - Cunha, A. A1 - Rogge, Andreas ED - De Stefano, A. T1 - Vibration-based structural health monitoring of a highway bridge based on continuous dynamic measurements during 14 years N2 - This paper presents the continuous dynamic measurements of an aging prestressed box-beam bridge during the period from 2000 to 2013, which consists of dynamic properties and environmental/operational factors, as well as the Variation of the extracted health features after removing the environmental/operational effects. Firstly, the variations of frequency estimates, temperatures and traffic loads from 2000 to 2013 are described. Subsequently, correlation analysis between them indicates the nonlinear influences of the temperature on the frequency estimates. The Multiple Linear Regression (MLR) method is used to remove the environmental/operational effects and the health index is proposed by performing the Novelty Detection analysis of the residual errors. Finally, the variations of the health index may indicate clear structural modifications that can be also characterized by the long term monitoring of the dynamic strain in the prestressed cable. T2 - SHMII-7 - 7th International conference on structural health monitoring of intelligent infrastructure CY - Torino, Italy DA - 01.07.2015 KW - Westend bridge PY - 2015 SP - 1 EP - 12 AN - OPUS4-35124 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Rücker, Werner T1 - Aufgaben der Dauerüberwachung und bauliche Bewertung am Beispiel von Betonbrücken und Windenergieanlagen T2 - Deutscher Ausschuss für Stahlbeton, Fachtagung 2005, BAM CY - Berlin, Germany DA - 2005-03-10 PY - 2005 AN - OPUS4-7145 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Baeßler, Matthias A1 - Rücker, Werner ED - Soize, C. ED - Schueller, G. T1 - New results on the behaviour of ballasted tracks on bridge decks T2 - IMO-WIND: An integrated monitoring system for offshore wind energy turbines CY - Paris, France DA - 2005-09-04 KW - Schotteroberbau KW - Beschleunigung KW - Eisenbahnbrücken KW - Gleislage KW - Destabilisierung PY - 2005 SN - 90-5966-033-1 VL - 2 SP - 1077 EP - 1082 PB - Millpress CY - Rotterdam AN - OPUS4-11234 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Baeßler, Matthias A1 - Rücker, Werner T1 - Die Wirkung vertikaler Überbaubeschleunigungen von Eisenbahnbrücken auf den Schotteroberbau KW - Schotteroberbau KW - Beschleunigung KW - Eisenbahnbrücken KW - Gleislage KW - Destabilisierung PY - 2005 SN - 0013-2810 VL - 56 IS - 1 SP - 14 EP - 22 PB - Eurailpress Tetzlaff-Hestra CY - Hamburg AN - OPUS4-11232 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -