55246
2022
eng
lecture
0
--
--
--
Wave propagation from hammer, vibrator and railway excitation – theoretical and measured attenuation in space and frequency domain
The attenuation of wave amplitudes is ruled by the planar, cylindrical or spher-ical geometry of the wave front (the geometric or power-law attenuation) but also by the damping of the soil (an exponential attenuation). Several low- and high-frequency filter effects are derived for the layering and the damping of the soil, for the moving static and the distributed train loads and for a homoge-neous or randomly heterogeneous soil. Measurements of hammer- and train-induced vibrations at five sites have been analysed for these attenuation and filter effects. The measured attenuation with distance can be discribed by gen-eralised power laws and some reasons will be discussed. The theoretical filter effects can well be found in the measurements.
10th Wave Mechanics and Vibration Conference (WMVC)nce
Lisbon, Potugal
04.07.2022
06.07.2022
publish
false
true
0
Lutz Auersch
eng
uncontrolled
Hammer impact
eng
uncontrolled
Train passage
eng
uncontrolled
Layered soil
eng
uncontrolled
Attenuation
eng
uncontrolled
Filter effects
eng
uncontrolled
Randomly heterogeneous soil
eng
uncontrolled
Scattering
Ingenieurbau
7 Bauwerkssicherheit
7.2 Ingenieurbau
Infrastruktur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
Präsentation
56035
2022
eng
lecture
0
--
--
--
Measurement and evaluation tools for ground and building vibrations from industrial process-es, construction work, traffic and other sources
Vibration measurements have many causes and many technical and natural sources. Problems can sometimes be solved by short-term measurements, but in many cases, a long-term measurement is necessary. In long-term measurements of days, weeks, months and even years, it is easy to collect a huge quantity of raw data, but at the end, the post-processing of these data can be exhausting (for example one-year vibration data of a wind energy tower). A software has been developed which con-sists of measuring and evaluation routines where the measuring routines can operate different meas-uring systems and different measuring cards. The main advantage of this software is the fact that the interesting evaluations can be integrated in the measuring process so that the characteristics of the vibration can be extracted without storing all the raw data. Only important time segments are stored, for example train passages. The overall concept of the software and the main evaluation routines will be described in some details. Examples of our measurement experience will illustrate the capabilities of the software. 1) Surveying construction work in nearby sensitive buildings (for example an old wind tunnel), including a stable alarm system and meaningful vibration limits. 2) Prediction of train-induced vibration for a planned building to prevent annoyance and to improve the building design. 3) Modal analysis and long term measurements of several single- or multi-span, concrete or steel bridges 4) Modal and wave analysis of coupled floors in a historical building (“Neues Palais” at Potsdam). 5) Soil properties of various measurement sites (different routines to evaluate the dispersion). Moreover, from many projects, amplitudes, frequencies, and attenuation laws have been collected and analysed for the different sources such as vibratory or impact pile driving and ground compaction, demolition work with different machines, blasting in quarries and in tunnel works, bomb and mine clearing.
28th International Congress on Sound and Vibration (ICSV28)
Online meeting
25.07.2022
28.07.2022
publish
false
true
0
Lutz Auersch
eng
uncontrolled
Ground vibration
eng
uncontrolled
Building vibration
eng
uncontrolled
Measurement
eng
uncontrolled
Evaluation
eng
uncontrolled
Modes and waves
Ingenieurbau
7 Bauwerkssicherheit
7.2 Ingenieurbau
Infrastruktur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
Präsentation
56036
2022
eng
lecture
0
--
--
--
Effects of a varying track and soil stiffness on ground vibrations near railway lines
Usually, geometric irregularities are considered as the main cause of ground vibrations from trains. A varying stiffness of the track, the track support and the soil can also generate ground vibrations. The regular stiffness variation of the track on and between the sleepers results in a deterministic dynamic axle load. The random stiffness variation of the track support yields also dynamic axle loads. The dynamic axle loads are generated by the varying wheel displacements under the static axle load by the acceleration of the unsprung mass of the rail vehicle. The random stiffness variation has a second effect. The pulses from the passage of the static axle loads are superposed regularly to the quasi-static response, but also irregularly to yield a “scattered” part of the axle pulses. The same holds for a random variation of the soil stiffness. All these effects of stiffness variations have been calculated by wavenumber-domain multi-beam track models, a random finite-element soil model and the superposition of axle impulses in a stochastic simulation. The results are confronted with many measurements at different sites. It is concluded that the stiffness variation of the track and the soil generate an important ground vibration component near railway lines.
Railways 2022
Montpellier, France
22.08.2022
25.08.2022
publish
false
true
0
Lutz Auersch
eng
uncontrolled
Ground vibration
eng
uncontrolled
Railways
eng
uncontrolled
Varying track stiffness
eng
uncontrolled
Varying soil stiffness
Ingenieurbau
7 Bauwerkssicherheit
7.2 Ingenieurbau
Infrastruktur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
Präsentation
56038
2022
eng
lecture
0
--
--
--
Railway-induced ground and building vibrations – Analysis in frequency-wavenumber domain and fast prediction with approximate models
A simple and fast prediction scheme is presented for train-induced ground and building vibrations. For the emission, finite-element boundary-element or multiple-beam-on-continuous-soil models of the track have been analysed and approximated by faster track-on-Winkler-soil models. The vehicle-track interaction due to irregularities yields the excitation forces. For the transmission of waves in the soil, the wavenumber integral of the compliance of layered soils has been evaluated. The calculation time is reduced for the prediction by using the solution of a homogeneous half-space with a frequency-dependent wave velocity (the dispersion) of the soil. For the immision, many 2 and 3-dimenisonal finite-element building models have been investigated, and a good approximation has been established by a 1-dimensional soil-wall-floor model. In addition, the axle sequence of the train, the quasi-static and the “scattered” response of the soil, and the wave propagation from a tunnel to a pile foundation of a building have been included.
ISMA-Conference
Leuven, Belgium
12.09.2022
14.09.2022
publish
false
true
0
Lutz Auersch
eng
uncontrolled
Ground vibration
eng
uncontrolled
Building vibration
eng
uncontrolled
Railways
eng
uncontrolled
Simple and fast prediction
Ingenieurbau
7 Bauwerkssicherheit
7.2 Ingenieurbau
Infrastruktur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
Präsentation
56450
2022
eng
lecture
0
--
--
--
Geotechnical challenges in the field of Offshore Wind Energy. Micromechanical perspectives beyond the FEM
This talk provides a brief overview on some geomechanical phenomena and problematic issues in the field of offshore wind-energy geotechnics, with reference to their associated challenges for a numerical analysis/simulation. These may include large deformations, fluid coupling and grain-scale phenomena, all of which are generally difficult to be addressed with conventional FE techniques.
These challenges are illustrated here with a practical example for the retrofit of axially loaded piles using compaction grouting techniques. In this case, the mechanical effects of the retrofit may be analysed with standard FE techniques, but require the adoption of strong assumptions, while the injection process itself can only be analysed with special techniques such as the MPM.
Finally, an LBM-DEM framework for the micromechanical analysis of such problems is introduced and a practical application for the estimation of the soil resistance to driving (SRD) in layered profiles is discussed.
Online Symposium on Meshfree models for Engineers: Where are they really worthwhile?
Online meeting
01.12.2022
publish
false
true
0
Pablo Cuéllar
eng
uncontrolled
Offshore wind energy
eng
uncontrolled
Offshore geotechnics
eng
uncontrolled
Micromechanical simulation
eng
uncontrolled
LBM-DEM
eng
uncontrolled
Pile retrofit system
Angewandte Physik
Ingenieurbau
7 Bauwerkssicherheit
7.2 Ingenieurbau
Energie
Infrastruktur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
Präsentation
54769
2022
deu
lecture
0
--
--
--
Wellenausbreitung und Pfähle im inhomogenen Boden – Gesetzmäßigkeiten für die Gründung von Windenergieanlagen und für die Prognose von Bahnerschütterungen aus Tunneln
Es wird eine gekoppelte Finite-Element-Randelementmethode zur Berechnung von Pfahlgrün-dungen in inhomogenen (geschichteten) Böden vorgestellt. Sie beruht auf den Greenschen Funktionen (Punktlastlösungen) für inhomogene Böden. Diese Lösungen können auch für die Wellenausbreitung in der Tiefe, zum Beispiel von einem Bahntunnel zu einem eingebetteten Gebäude, dem Kellergeschoss benutzt werden. Die Punktlastlösungen in der Tiefe werden mit der Halbraumlösung an der Bodenoberfläche und mit der Vollraumlösung verglichen und Gesetzmäßigkeiten für geschichtete Böden abgeleitet. Zu den Pfahlgründungen werden die Horizontalnachgiebigkeiten von Pfählen in geschichteten Böden dargestellt. Für den homoge-nen und den kontinuierlich steifer werdenden Boden werden Potenzgesetze für den Boden- und Pfahleinfluss aufgestellt. Der Vergleich mit dem Winkler-Modell der rein lokalen Boden-reaktion zeigt, dass die Winkler-Bettung in allen Fällen einen zu kleinen Bodeneinfluss ergibt.
7. VDI-Fachtagung Baudynamik
Würzburg, Germany
27.4.2022
28.4.2022
publish
false
true
0
Lutz Auersch
deu
uncontrolled
Wellenausbreitung in der Tiefe
deu
uncontrolled
Pfahlnachgiebigkeiten
deu
uncontrolled
Erschütterungen
deu
uncontrolled
Tunnel
Ingenieurbau
7 Bauwerkssicherheit
7.2 Ingenieurbau
Infrastruktur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
Präsentation
56601
2022
deu
lecture
0
--
--
--
Die Einfügedämmung bei Schienenfahrwegen Definition, Messung und Berechnung
Die Definition und Beschreibung der Einfügedämmung im Normentwurf DIN 45673-4 ist noch nicht richtig. Es wird die Beschreibung aus DIN 45673-3 herangezogen, die für Messungen gilt. Für die drei Rechenverfahren gibt es jeweils eine passende Beschreibung. Mit diesen Vorlagen ist eine vernünftige Definition der Einfügungsdämmung zu finden. Es bedarf einer Abgrenzung gegenüber anderen (falschen) Möglichkeiten. Des Weiteren ist der Anhang 2 erweitert und der Parametersatz im Anhang 1 auf das Wesentliche reduziert worden.
Norm-Arbeitsausschuss Schwingungsminderung in der Umgebung von Verkehrswegen
Online meeting
14.12.2022
14.12.2022
publish
false
true
0
Lutz Auersch
deu
uncontrolled
Einfügungsdämmung
deu
uncontrolled
Schienenfahrwege
deu
uncontrolled
Kraft auf den Boden
deu
uncontrolled
Erschütterungen im Fernfeld
Ingenieurbau
7 Bauwerkssicherheit
7.2 Ingenieurbau
Infrastruktur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
Präsentation
54243
2022
deu
lecture
0
--
--
--
Die Berechnung der Einfügedämmung bei Schienenfahrwegen – die Impedanzmethode mit einem Freiheitsgrad
Mit dieser Methode kann man die Einfügedämmung eines Schienenstützpunkts/einer Schwelle korrekt berechnen. Sie gilt in ihrer ursprünglichen Form für eine Unterschottermatte in einem Tunnel
Norm-Arbeitsausschuss Schwingungsminderung in der Umgebung von Verkehrswegen
Online meeting
20.1.2022
20.1.2022
publish
false
true
0
Lutz Auersch
deu
uncontrolled
Impedanzmethode
deu
uncontrolled
Elastische Elemente
deu
uncontrolled
Schienenfahrweg
Ingenieurbau
7 Bauwerkssicherheit
7.2 Ingenieurbau
Infrastruktur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
Präsentation
53726
2021
eng
lecture
0
--
--
--
Micromechanical framework for a 3D solid cohesion model - Implemantation, validation and perspectives
This article presents a solid cohesion model for the simulation of bonded granular assemblies in the frame of 3D discrete element approaches (DEM). A simple viscoplastic cohesion model for 2D geometries is extended to 3D conditions, while its yield criterion is generalized as a hyper-surface in the space of bond solicitations to include torsional moments. The model is then calibrated using experimental results of uniaxial traction at both the microscopic and macroscopic scales with an artificial granular cohesive soil. The paper finally presents some simulated results on the macromechanical sample traction application and briefly discusses the model's current limitations and promising prospects for subsequent works.
VII International Conference on Particle-Based Methods PARTICLES 2021
Hamburg, Germany
04.10.2021
publish
false
true
0
Mohammad Hassan Sanayei
A. Farhat
Li-Hua Luu
L. Werner
C. Rettinger
P. Philippe
Pablo Cuellar
eng
uncontrolled
Granular Cohesive Materials,
eng
uncontrolled
DEM
eng
uncontrolled
Micromechanical Tensile Failure
eng
uncontrolled
Macromechanical Sample Strength
Ingenieurbau
7 Bauwerkssicherheit
7.2 Ingenieurbau
Infrastruktur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
Präsentation
54130
2021
eng
lecture
0
--
--
--
Enhancing structural models with material tests and static response data - a case study considering a steel beam with asphalt layer subject to temperature variations
Gradual or sudden changes in the state of structural systems caused, for example, by deterioration or accidental load
events can influence their load-bearing capacity. Structural changes can be inferred from static and/or dynamic response data
measured by structural health monitoring systems. However, they may be masked by variations in the structural response due to
varying environmental conditions. Particularly, the interaction of nominally load-bearing components with nominally non-load
bearing components exhibiting characteristics that vary as a function of the environmental conditions can significantly affect the
monitored structural response. Ignoring these effects may hamper an inference of structural changes from the monitoring data. To
address this issue, we adopt a probabilistic model-based framework as a basis for developing digital twins of structural systems
that enable a prediction of the structural behavior under varying ambient condition. Within this framework, different types of data
obtained from real the structural system can be applied to update the digital twin of the structural system using Bayesian methods
and thus enhance predictions of the structural behavior. In this contribution, we implement the framework to develop a digital
twin of a simply supported steel beam with an asphalt layer. It is formulated such that it can predict the static response of the beam
in function of its temperature. In a climate chamber, the beam was subject to varying temperatures and its static response wass
monitored. In addition, tests are performed to determine the temperature-dependent properties of the asphalt material. Bayesian
system identification is applied to enhance the predictive capabilities of the digital twin based on the observed data.
International Conference on Structural Health Monitoring of Intelligent Infrastructure (SHMII-10)
Online meeting
30.06.2021
02.07.2021
publish
false
true
0
Patrick Simon
eng
uncontrolled
Digital twin
eng
uncontrolled
Structural health monitoring
eng
uncontrolled
Material tests
eng
uncontrolled
Bayesian updating
Ingenieurbau
7 Bauwerkssicherheit
7.1 Baustoffe
7.2 Ingenieurbau
Infrastruktur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
Präsentation
53748
2021
eng
lecture
0
--
--
--
Probabilistic approaches to the design and assessment of offshore foundations considering spatially varying site conditions
In this presentation, we discuss the potential of probabilistic approaches to the design and assessment of offshore foundations. The potential is demonstrated in a numerical example considering a laterally loaded monopile. As an outlook, we present a concept for managing the risk associated with installing large monopiles.
3rd International Conference on Structural Integrity for Offshore Energy Industry (SI 2021)
Online meeting
15.11.2021
16.11.2021
publish
false
true
0
Ronald Schneider
eng
uncontrolled
Offhore
eng
uncontrolled
Foundations
eng
uncontrolled
Probabilistic
eng
uncontrolled
Design
eng
uncontrolled
Assessment
Angewandte Physik
7 Bauwerkssicherheit
7.2 Ingenieurbau
Energie
Datei im Netzwerk der BAM verfügbar ("Closed Access")
Präsentation
53749
2021
eng
lecture
0
--
--
--
A risk-based framework for optimizing inspection and maintenance of deteriorating structures monitored by vibration-based monitoring systems
In this presentation, a framework for integrating vibration-based structural health monitoring data into the optimization of inspection and maintenance of deteriorating structural systems is presented. The framework is demonstrated in an illustrative example considering a steel frame subject to fatigue.
EERA JP Wind WORKSHOP on Ongoing research in offshore wind structures
Online meeting
16.09.2021
17.09.2021
publish
false
true
0
Ronald Schneider
eng
uncontrolled
Structural Health Monitoring
eng
uncontrolled
Inspection
eng
uncontrolled
Maintenance
eng
uncontrolled
Deterioration
eng
uncontrolled
Vibration
eng
uncontrolled
Structural Systems
Angewandte Physik
Ingenieurbau
7 Bauwerkssicherheit
7.2 Ingenieurbau
Energie
Infrastruktur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
Präsentation
54916
2022
deu
lecture
0
--
--
--
Elastische Elemente in der Emission, Transmission und Immission von Bahnerschütterungen
Dieser Vortrag präsentiert einige Prinzipien und einige Beispiele zur Minderung von Eisenbahnerschütterungen. Die Prinzipien unterscheiden sich für die Minderungsmaßnahmen im Gleis, im Boden und bei Gebäuden. Kraftübertragungsfunktionen isolierter und nicht isolierter Gleissysteme, reflektierte und durchgelassene Wellenamplituden bei gefüllten Bodenschlitzen und die Übertragung der Freifeldschwingungen ins Gebäude werden analysiert. Bei den einfachen Gleismodellen muss der richtige Anteil der unabgefederte Fahrzeugmasse zum eindimensionalen Gleismodell hinzugefügt werden. Der Minderungseffekt eines gefüllten Bodenschlitzes ist von der Steifigkeit und nicht von der Impedanz des Schichtmaterials bestimmt. Bei einer elastischen Gebäudelagerung muss die Minderungswirkung mit der richtigen Boden- (Fundament-) Steifigkeit berechnet werden, und das abgeminderte Gebäudeverhalten hängt wesentlich von der effektiven Gebäudemasse ab, die mit zunehmender Frequenz deutlich kleiner als die starre Gebäudemasse ist.
Norm-Arbeitsausschuss Schwingungsminderung in der Umgebung von Verkehrswegen
Bludenz, Austria
17.5.2022
17.5.2022
publish
false
true
0
Lutz Auersch
deu
uncontrolled
Erschütterungsminderung
deu
uncontrolled
Bahngleis
deu
uncontrolled
Bodenschlitz
deu
uncontrolled
Gebäudelagerung
deu
uncontrolled
Elastische Elemente
Ingenieurbau
7 Bauwerkssicherheit
7.2 Ingenieurbau
Infrastruktur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
Präsentation
53703
2021
eng
lecture
0
--
--
--
Prediction of building noise and vibration – 3D finite element and 1D wave propagation models
Construction work or traffic excite nearby buildings, and the perceptible or audible vibration can be a nuisance for the inhabitants. The transfer of the vibration from the free field to the building has been calculated by the finite element method for many models in consultancy and research work. The analysis for all storeys of certain building points such as walls, columns and floors unveiled some rules, some typical modes, and some wavetype responses. A simplified building-soil model has been created, which includes well these effects of building-soil resonance, wall/column resonance, floor resonances, and the high-frequency reduction. The model consists of one wall for a wall-type apartment building or a column for each specific part (mid, side or corner) of a column-type office building. The building response in the high-frequency (acoustic) region is calculated as mean values over all storeys and over wider frequency bands, by wave-type asymptotes of an infinitely tall building, and by the soil to wall ratio of impedances. The secondary noise is predicted by Transfer values between the building vibration (center of floors, walls at a room corner) and the sound pressure.
Euronoise 2021
Online meeting
25.10.2021
27.10.2021
publish
false
true
0
Lutz Auersch
eng
uncontrolled
Building vibration
eng
uncontrolled
Finite element models
eng
uncontrolled
Soil-wall floor model
eng
uncontrolled
Apartment building
eng
uncontrolled
Office tower
Ingenieurbau
7 Bauwerkssicherheit
7.2 Ingenieurbau
Infrastruktur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
Präsentation
53704
2021
deu
lecture
0
--
--
--
Die Amplitudenabnahme im Boden bei Punkt- und Zuglast
Die Linienlastgesetzmäßigkeit gilt nicht für Zuganregung. Die Punktlastgesetzmäßigkeit wird bei kurzen Zügen in größeren Entfernungen erreicht. Bei langen Zügen reduziert sich die Abnahme um r-0,3 für die theoretische exponentielle Dämpfungsabnahme, um r-0,5 für die vereinfachte potentielle Dämpfungsabnahme. Die gemessenen Abnahmereduktionen liegen in diesem Bereich.
Norm-Arbeitsausschuss Schwingungsminderung in der Umgebung von Verkehrswegen
Cologne/Germany und Online meeting
28.10.2021
28.10.2021
publish
false
true
0
Lutz Auersch
deu
uncontrolled
Amplituden-Abstands-Gesetze
deu
uncontrolled
Geometrie
deu
uncontrolled
Dämpfung
Ingenieurbau
7 Bauwerkssicherheit
7.2 Ingenieurbau
Infrastruktur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
Präsentation
53033
2021
eng
lecture
0
--
--
--
Numerical Modelling of Local Pile Deformations and Buckling incorporating the Pile-Soil-Interaction
Pile Tip Buckling and Buckling of embedded piles both depend very much on the pile-soil-interaction and its modelling. The presentation gives an overview about current problems and research activities in the light of the development of numerical models.
WESC Wind Energy Science Conference
Hannover, Germany
25.05.2021
28.05.2021
publish
false
true
0
Matthias Baeßler
eng
uncontrolled
Offshore Wind Energy Converter
eng
uncontrolled
Pile Foundation
eng
uncontrolled
Monopile Buckling
eng
uncontrolled
Pile Tip Buckling
Angewandte Physik
7 Bauwerkssicherheit
7.2 Ingenieurbau
Energie
Datei im Netzwerk der BAM verfügbar ("Closed Access")
Präsentation
52221
2021
deu
lecture
0
--
--
--
Vorstellung des Bauwerksmonitoring der Maintalbrücke Gemünden im Vorhaben AISTEC
Im Abteilungsseminar wird der aktuelle Umsetzungsstand des Bauwerksmonitorings an der Maintalbrücke Gemünden vorgestellt, sowie die nächsten Schritte zur Systemintegration von Konzepten an Realbauwerken.
Abteilungs-Vortragsseminar Abteilung 7. Bauwerkssicherheit
Online meeting
03.03.2021
03.03.2021
publish
false
true
0
Ralf Herrmann
deu
uncontrolled
Structural Health Monitoring
deu
uncontrolled
Maintalbrücke Gemünden
deu
uncontrolled
Bauwerksüberwachung
deu
uncontrolled
Datenmanagement
Ingenieurbau
7 Bauwerkssicherheit
7.2 Ingenieurbau
Infrastruktur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
Präsentation
53000
2021
eng
lecture
0
--
--
--
Stochastic subspace-based damage detection of a temperature affected beam structure
Structural health monitoring (SHM) of civil structures often is limited due to changing environmental conditions, as those changes affect the structural dynamical properties in a similar way like damages can do. In this article, an approach for damage detection under changing temperatures is presentedand applied to a beam structure. The used stochastic subspace-based algorithm relies on a reference null space estimate, which is confronted to data from the testing state in a residual function. For damage detection the residual is evaluated by means of statistical hypothesis tests. Changes of the system due to temperature effects are handled with a model interpolation approach from linear parameter varying system theory. From vibration data measured in the undamaged state at some few reference temperatures, a model of the dynamic system valid for the current testing temperature is interpolated. The reference null space and the covariance matrix for the hypothesis test is computed from this interpolated model. This approach has been developed recently and was validated in an academic test case on simulations of a mass-spring-damper. In this paper, the approach is validated experimentally on a beam structure under varying temperature conditions in a climate chamber. Compared to other approaches, the interpolation approach leads to significantly less false positive alarms in the reference state when the structure is exposed to different temperatures, while faults can still be detected reliably
10th International Conference on Structural Health Monitoring of Intelligent Infrastructure, SHMII 10
Online meeting
30.06.2021
publish
false
true
0
Eva Viefhues
eng
uncontrolled
Damage detection
eng
uncontrolled
Subspace methods
eng
uncontrolled
Temperature effects
eng
uncontrolled
Model interpolation
eng
uncontrolled
Climate chamber
eng
uncontrolled
Laboratory beam structure
Ingenieurbau
7 Bauwerkssicherheit
7.2 Ingenieurbau
Infrastruktur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
Präsentation
53026
2021
deu
lecture
0
--
--
--
Aktivitäten in Forschung und Zulassung im Bereich Windenergie
Die vielfältigen Tätigkeiten der BAM im Bereich technischer Sicherheit von Windenergieanlagen werden vorgestellt und im Bereich aktueller Entwicklungen in der Fügetechnik detailliert.
Arbeitskreis Gründungsstrukturen und Stahlbau der WAB
Online meeting
13.04.2021
publish
false
true
0
Matthias Baeßler
Thomas Kannengießer
deu
uncontrolled
BAM Windenergie Fügetechnik
Angewandte Physik
7 Bauwerkssicherheit
7.2 Ingenieurbau
9 Komponentensicherheit
9.4 Integrität von Schweißverbindungen
Energie
Datei im Netzwerk der BAM verfügbar ("Closed Access")
Präsentation
52812
2021
eng
lecture
0
--
--
--
Bayesian system identification of a reinforced concrete beam subject to temperature variations based on static response data
Changes in the measured response of structural systems can be an indication of structural damages. However, such changes can also be caused by the effect of varying environmental conditions. To detect, localize and quantify changes or damages in structural systems subject to varying environmental conditions, physics-based models of the structural systems have to be applied which explicitly account for the influence of ambient conditions on the structural behavior. Data obtained from the structural systems should be used to calibrate the models and update predictions. Bayesian system identification is an effective framework for this task. In this paper, we apply this framework to learn the parameters of two competing structural models of a reinforced concrete beam subject to varying temperatures based on static response data. The models describe the behavior of the beam in the uncracked and cracked condition. The data is collected in a series of load tests in a climate chamber. Bayesian model class selection is then applied to infer the most plausible condition of the beam conditional on the available data.
Tenth International Conference on Bridge Maintenance, Safety and Management (IABMAS 2020)
Online meeting
11.04.2021
15.04.2021
publish
false
true
0
Patrick Simon
eng
uncontrolled
Bayesian system identification
eng
uncontrolled
Reinforced concrete
eng
uncontrolled
Damage identification
eng
uncontrolled
Environmental effects
eng
uncontrolled
Structural health monitoring
eng
uncontrolled
Structural systems
Ingenieurbau
7 Bauwerkssicherheit
7.2 Ingenieurbau
Infrastruktur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
Präsentation