7.2 Ingenieurbau
Filtern
Dokumenttyp
- Vortrag (170) (entfernen)
Referierte Publikation
- nein (170) (entfernen)
Schlagworte
- Structural Health Monitoring (16)
- Offshore wind energy (9)
- Ground vibration (8)
- Brücken (7)
- Fatigue (7)
- Offshore (7)
- Design methods (6)
- Physical phenomenology (6)
- Pile foundations (6)
- Structural health monitoring (6)
- Offshore wind turbines (5)
- SHM (5)
- Bahnerschütterungen (4)
- Building vibration (4)
- Deterioration (4)
- Foundations (4)
- Gründungsstrukturen (4)
- Model interpolation (4)
- Monitoring (4)
- Numerical modelling (4)
- Structural systems (4)
- Windenergie (4)
- Buckling (3)
- Damage characterization (3)
- Datenmanagement (3)
- Deep foundations (3)
- Erschütterungsminderung (3)
- Grout (3)
- Hammer impact (3)
- Impact (3)
- Inspection (3)
- Leichtbau (3)
- Maintenance (3)
- Monopiles (3)
- Offshore Windenergieanlagen (3)
- Offshore geomechanics (3)
- Physical testing (3)
- Planar tomography (3)
- Probabilistic (3)
- Shell Buckling (3)
- Slab track (3)
- Soil-structure interaction (3)
- Steel structures (3)
- Train passage (3)
- Vibration (3)
- Wind Energy (3)
- Zivile Sicherheit (3)
- AISTEC (2)
- Automatisierte schweißtechnische Fertigung (2)
- Bayesian updating (2)
- Belastungsversuch (2)
- Bridges (2)
- Compaction Grouting (2)
- Container loading (2)
- Coupled fluid-particle simulation (2)
- Crack detection (2)
- Damage detection (2)
- Design (2)
- Dispersionsmessung (2)
- Drop test (2)
- Elastische Elemente (2)
- Elastische Gleiselemente (2)
- Emission (2)
- Environmental effects (2)
- Erosion (2)
- Erschütterungen (2)
- Erschütterungsprognose (2)
- Fault detection (2)
- Foundation load (2)
- GPU parallel computation (2)
- Großer Fallturm Horstwalde (2)
- High-performance computing (2)
- High-strength concrete (2)
- Inspection planning (2)
- Klimakammer (2)
- Layered soil (2)
- Micromechanical modelling (2)
- Modalanalyse (2)
- Numeric simulation (2)
- Offshore Pile Foundation (2)
- Offshore Windenergy Pile Buckling (2)
- Offshore foundations (2)
- Offshore geotechnics (2)
- Offshore wind (2)
- Offshore wind turbine (2)
- Pile Tip Buckling (2)
- Railway (2)
- Railways (2)
- Reinforced concrete structure (2)
- Reliability (2)
- Repair (2)
- Repowering (2)
- Risslumineszenz (2)
- Schwingungsdynamik (2)
- Statistical method (2)
- Subspace-based method (2)
- Suction bucket (2)
- Temperature effects (2)
- Temperature rejection (2)
- Train-induced ground vibration (2)
- Tunnel (2)
- Ultrasonic testing (2)
- Vehicle-track-soil interaction (2)
- Vibration measurement (2)
- Vibration measurements (2)
- Wellengeschwindigkeit (2)
- Wind (2)
- Windenergy (2)
- 2-span bridge (1)
- Achsimpulse (1)
- Acoustic emission testing (1)
- Amplitude-charge weight laws (1)
- Amplitude-distance laws (1)
- Amplituden-Abstands-Gesetze (1)
- Analysis of variance (1)
- Ansys Autodyn (1)
- Apartment building (1)
- Artificial Intelligence (1)
- Artificial intelligence (1)
- Asphalt (1)
- Assessment (1)
- Attenuation (1)
- Automatisierte Fertigung (1)
- Automatisierte schweißtechniche Fertigung (1)
- Axial load bearing (1)
- Axle impulses (1)
- Axle pulses (1)
- Axle-sequence spectrum (1)
- BAM Windenergie Fügetechnik (1)
- Bahngleis (1)
- Ballast track (1)
- Base isolation (1)
- Baugrunddynamik (1)
- Bauwerk-Boden-Wechselwirkung (1)
- Bauwerksmonitoring (1)
- Bauwerksüberwachung (1)
- Bayes'sche Analyse (1)
- Bayesian System Identification (1)
- Bayesian methods (1)
- Bayesian system identification (1)
- Belastungsfahrt (1)
- Belastungszug (1)
- Beulen (1)
- Big Data (1)
- Bionik (1)
- Blast (1)
- Bodenschlitz (1)
- Bodenübertragungsfunktion (1)
- Boreholes (1)
- Boundary element method (1)
- Box-Behnken (1)
- Bridge (1)
- Brücke (1)
- Buckling piles circular shells (1)
- Building information modelling (1)
- Bulging (1)
- CFD (1)
- CPT (1)
- Cars (1)
- Centerline solidification cracking (1)
- Changing process noise (1)
- Chemisoprtion (1)
- Climate Chamber (1)
- Climate chamber (1)
- Compressive Cyclic loading (1)
- Compressive cyclic loading (1)
- Compressive strength (1)
- Computer Vision (1)
- Concrete (1)
- Crack Luminescence (1)
- Crack formation (1)
- Crack pattern (1)
- Crack repair (1)
- Cracks (1)
- Cyclic axial shearing (1)
- Cyclic degradation (1)
- Cyclic load (1)
- DEM (1)
- DEM-LBM simulation (1)
- DUCON® (1)
- Damage Detection (1)
- Damage identification (1)
- Deckeneigenfrequenzen (1)
- Deckenschwingungen (1)
- Design models (1)
- Design practice (1)
- DiMoWind RDS-PP Maintenance Digital Twin Offshore Wind Energy (1)
- Digital Image Correlation (1)
- Digital Twin (1)
- Digital twin (1)
- Digitalisierung (1)
- Displacements (1)
- Drone (1)
- Drop Test (1)
- Drucker-Prager (1)
- Ductility (1)
- Dynamic soil properties (1)
- Dynamische Bodenkennwerte (1)
- Dämpfung (1)
- E-modulus (1)
- EERA Joint Program (1)
- Earth masonry (1)
- Earthen hydraulic constructions (1)
- Earthen hydraulic infrastructures (1)
- Einflusslinie (1)
- Einflusslinien (1)
- Einfügungsdämmung (1)
- Elastische Gebäudelagerung (1)
- End-of-life decision making (1)
- Energy (1)
- Entscheidungsfindung (1)
- Environmental (1)
- Environmental Effects (1)
- Ermüdungsprüfung (1)
- Ermüdungsschäden (1)
- Erneuerbare Energien (1)
- Erosion of cohesive soils (1)
- Erschütterungen im Fernfeld (1)
- Erschütterungsausbreitung (1)
- Evaluation (1)
- Excitation forces (1)
- Explosion-induced ground vibrations (1)
- FEM (1)
- Fahrzeug-Fahrweg-Boden-Wechselwirkung (1)
- Faseroptik (1)
- Fatigue deterioration (1)
- Fiber optic sensing (1)
- Filter effects (1)
- Finite Elemente Simulation (1)
- Finite element models (1)
- Flexibility (1)
- Floors (1)
- Fluid-structure interaction (1)
- Fly ash (1)
- Footbridge (1)
- Force reconstruction (1)
- Freight train (1)
- Frequency response function (1)
- GMNIA (1)
- GNSS (1)
- GPU parallelisation (1)
- Gaussian Process (1)
- Gebäudelagerung (1)
- Gebäudemodelle (1)
- Gebäudeschwingungen (1)
- Gekoppelte Fluid-Partikel Simulationen (1)
- Geomechanics (1)
- Geomechanics of offshore foundations (1)
- Geometrie (1)
- Geotechnical site-characterization (1)
- Gleiströge (1)
- Granular Cohesive Materials, (1)
- Ground (1)
- Ground vibration measurements (1)
- Grout Injection (1)
- Grouted Connection (1)
- Grouted connection (1)
- Grouting (1)
- Halbraum (1)
- High-rise buildings (1)
- High-speed train (1)
- Immission (1)
- Impact damage of reinforced concrete (1)
- Impedanzmethode (1)
- Inertial interaction (1)
- Injection Sequence (1)
- Inspeciton (1)
- Interface (1)
- Interface model (1)
- Irregular ballast (1)
- Irregular soil (1)
- Irregularities (1)
- Jacket support structure (1)
- Jet erosion test (1)
- Kinematic interaction (1)
- Knudsen effect (1)
- Kraft auf den Boden (1)
- LBM-DEM (1)
- LBM-DEM coupling (1)
- Laboratory beam structure (1)
- Laser beam welding (1)
- Lateral load bearing (1)
- Layered soils (1)
- Leichtbauprinzipien (1)
- Lifetime Extension (1)
- Linear parameter varying systems (1)
- Load Test (1)
- Load bearing behaviour (1)
- Long-term shrinkage (1)
- Macromechanical Sample Strength (1)
- Maintal Bridge Gemuenden (1)
- Maintalbrücke Gemünden (1)
- Maintenance Digital Twin Offshore Wind Energy (1)
- Marine geotechnics (1)
- Material Point Method (1)
- Material moisture (1)
- Material tests (1)
- Measurement (1)
- Measurements (1)
- Mechanical challenges (1)
- Messfahrt (1)
- Metakaolin (1)
- Micro silica (1)
- Micro-reinforcement (1)
- Microfine cement (1)
- Micromechanical LBM-DEM simulation (1)
- Micromechanical Tensile Failure (1)
- Micromechanical analysis (1)
- Micromechanical simulation (1)
- Mitigation (1)
- Mix design (1)
- Mobile elements (1)
- Modal Analysis (1)
- Modal load spectrum (1)
- Modal system identification (1)
- Model Update (1)
- Model updating (1)
- Modellierung (1)
- Modes and waves (1)
- Molecular diffusion (1)
- Monopile (1)
- Monopile Buckling (1)
- Movin load test (1)
- Non destructive testing (1)
- Non-Destructive Evaluation (1)
- Non-destructive testing (1)
- Normung (1)
- Numerical analysis (1)
- Numerical model (1)
- Numerical modeling (1)
- Numerical simulation (1)
- Numerical simulation of impact damage (1)
- Offhore (1)
- Office tower (1)
- Offshore Structures (1)
- Offshore Wind (1)
- Offshore Wind Energy (1)
- Offshore Wind Energy Converter (1)
- Offshore Windenergie (1)
- Offshore pile foundations (1)
- Offshore wind energy foundations (1)
- Offshore wind farm (1)
- Offshore wind farms (1)
- Offshore wind-turbine foundations (1)
- Offshore-Wind (1)
- Offshore-Windenergieanlagen (1)
- Offshore-Windkraftanlagen (1)
- Optimal Sensor Placement (1)
- Passenger train (1)
- Pfahlfußbeulen (1)
- Pfahlnachgiebigkeiten (1)
- Physisorption (1)
- Pile Buckling (1)
- Pile Capacity (1)
- Pile Foundation (1)
- Pile ageing (1)
- Pile groups (1)
- Pile retrofit system (1)
- Pile-Tip-Buckling (1)
- Point Cloud (1)
- Post-impact evaluation (1)
- Prediction (1)
- Prediction of explosion induced ground and building vibration (1)
- Predictive maintenance (1)
- Probabilitische Ingenieurmodelle (1)
- Probability of Detection (1)
- Prognose (1)
- Quasi-static and dynamic tests (1)
- Radar (1)
- Railbridge (1)
- Railway bridge (1)
- Railway tracks (1)
- Railway trafiic (1)
- Railway tunnel (1)
- Randelementmethode (1)
- Randomly heterogeneous soil (1)
- Rayleighwellendispersion (1)
- Rechenmodelle (1)
- Rechenverfahren (1)
- Rehabilitation (1)
- Reinforced concrete (1)
- Research data management (1)
- Residual evaluation (1)
- Richtige Fahrzeugmasse (1)
- Risiko (1)
- Risikoanalyse (1)
- Risk (1)
- Risk-based maintenance planning (1)
- Rissprozes (1)
- Rissprozess (1)
- SHM Environmental (1)
- Safety (1)
- Scaling (1)
- Scattering (1)
- Schadensdetektion (1)
- Schadensüberwachung (1)
- Schienenfahrweg (1)
- Schienenfahrwege (1)
- Schwingungsbasierte Verfahren (1)
- Schwingungsmonitoring (1)
- Shrinkage (1)
- Simple and fast prediction (1)
- Simulation and experiment (1)
- Site-characterization (1)
- Size effect (1)
- Slenderness effect (1)
- Soil Struture Interaction (1)
- Soil erosion (1)
- Soil properties (1)
- Soil-Structure-Interaction (1)
- Soil-pile interaction (1)
- Soil-wall floor model (1)
- Soil-water-structure interaction (1)
- Spektralanalyse (1)
- Stability Buckling soil-structure-interaction piles offshore (1)
- Stabilität (1)
- Static load (1)
- Statistical correlations (1)
- Statistical tests (1)
- Statistische Korrelationen (1)
- Stereo photogrammetry (1)
- Stochastic Subspace Damage Detection (1)
- Structural Systems (1)
- Structural integrity (1)
- Structural integrity maintenance (1)
- Structural integrity management (1)
- Strukturmonitoring (1)
- Störgrößen (1)
- Subspace methods (1)
- Subspace-based residual (1)
- Substructures (1)
- Suction Bucket (1)
- Supplementary cementitious materials (1)
- Support structures (1)
- Surface line (1)
- Surface-tunnel reduction (1)
- System Identification (1)
- Systemidentifikation (1)
- TOP (1)
- Temperatureinflüsse (1)
- Tensile Capacity (1)
- Time-variant reliability (1)
- Tip Buckling (1)
- Tomographic damage evaluation (1)
- Track damage (1)
- Train configuration (1)
- Train excitation (1)
- Train passages (1)
- Train speed (1)
- Tran speed (1)
- Transfer fuction (1)
- Transmission (1)
- Tunnel line (1)
- Tunnelstrecke (1)
- UHPC (1)
- Umwelteinflüsse (1)
- Un- certainty (1)
- Uncertainty (1)
- Uncertainty in reference (1)
- Unterraummethoden (1)
- Value of Information (1)
- Varying soil stiffness (1)
- Varying track stiffness (1)
- Vibration monitoring (1)
- Vibrations (1)
- Vollraum (1)
- Water-structure interaction (1)
- Wave-Tower interaction (1)
- Wellenausbreitung (1)
- Wellenausbreitung in der Tiefe (1)
- Wellenfeldberechnung (1)
- Wind Energy Structures (1)
- Wind Turbines (1)
- Wind energy (1)
- Wind turbines (1)
- Wind-farm aerodynamics (1)
- Windfarm wake analysis (1)
- Zuggeschwindigkeit (1)
- elastische Gebäudelagerungen (1)
- risk, reliability, inspection planning, offshore wind turbines (1)
- zerstreute Achslastimpulse (1)
- Übertragungsmatrizen (1)
- Überwachung (1)
Organisationseinheit der BAM
- 7 Bauwerkssicherheit (170) (entfernen)
As many wind turbines approach the end of their design lifetime, from a technical point of view, comprehensive fatigue analysis of all critical parts is necessary to decide what comes after – continued operation, repowering, or decommissioning. Typically, it is a two-stage evaluation process consisting of a physical inspection of the structure and an analytical part to compare the design and actually experienced loading conditions. Structural health monitoring helps to reduce the uncertainties in the estimations by providing insight into deviations between the designed and the built structure. Furthermore, it allows the evaluation of the consumed fatigue lifetime by analyzing the strain measurements that mirror the actual structural response to experienced environmental and operational conditions. However, the measurement values are limited to a sparse number of instrumented spots on the structure, and further extrapolation to the non-instrumented (critical) sections is required to perform a complete fatigue assessment. One known approach is the external force reconstruction, which has only scarcely been considered for application in offshore wind turbines. In order to extend the previously developed thrust force reconstruction framework, this work discusses the possibilities and challenges of wind and wave loading reconstruction in offshore wind turbine support structures.
Dieser Kurzvortragg erläutert nichtlineare Phänomene die angesichts der aktuell wachsenden Dimensionen von Monopfahlgründungen für Offshorewindenergieanlagen zunehmend an Bedeutung gewinnen. Insbesondere wird dabei auf das Pfahlfußbeulen sowie das Schalenbeulen des bereits installierten Pfahles eingegangen.
The research project Verification of Buckling Assessment and Behaviour in Large Monopiles (VERBATIM) focuses on challenges arising due to the ongoing increase of dimensions of monopiles as foundation for offshore wind turbines. This project is focused on two main topics:
- Monopile tip buckling during pile installation
- Local buckling of embedded piles during operation
It is known from previous investigations and experiences in practice that large deformations of a monopile tip during offshore installation works can occur. These large deformations initiated at the tip of the monopile are commonly referred to as “pile tip buckling”. Own research focuses on optimising monopile dimensions to reduce the cost of monopile foundations for offshore wind turbines while preventing pile tip buckling.
Buckling of embedded cylindrical shells for offshore structures is a common engineering task. Structures can be analysed using standard software and have been done so in recent studies e.g., Gottschalk. However, the trend towards larger monopile and optimised structures has led to a fundamental need for better and verified models. A main challenge is the submodelling of the structure-soil-interaction. Developing such complex models is one main goal of the VERBATIM project.
For both main topics model tests were performed at the laboratories of BAM and TU Berlin. These experimental results were used to verify related numerical models and simulations.
The new crack luminescence method offers the possibility of making fatigue surface cracks in metallic materials more visible during inspections through a special coating system. This coating system consists of two layers, whereby the first layer has fluorescent properties and emits visible light as soon as it is irradiated by UV light. The top layer is black and is designed to prevent the fluorescent layer from emitting if no crack develops in the underlying material.
The technique proved particularly useful in a wide variety of fatigue tests of steel components under laboratory conditions. Moreover, it has the potential to be used in various industrial applications. To enable industrial deployment and integration into maintenance strategies, a concept study is developed in this contribution, resulting in a qualification framework that can serve as a foundation for determining the reliability of the crack luminescence system in terms of a probability of detection curve. Within this study, factors causing measurement variability and uncertainty are being determined and their influences assessed. Due to the extension of the system by a moving computer vision system for automated crack detection using artificial intelligence, additional long-term effects associated with structural health monitoring systems need to be incorporated into an extended probability of detection study as part of the technical justification.
Finally, important aspects and findings related to design of experiments are discussed, and a framework for reliability assessment of a new optical crack monitoring method is presented, emphasizing the influence of various uncertainty parameters, including long-term effects such as system ageing.
The long-term preservation of our infrastructure requires not only intelligent sensor technology and highly developed monitoring procedures, but also innovative digital tools for analyzing, evaluating and utilizing the results. This includes mathematical and, in particular, probabilistic methods for damage detection and tracking as well as for calculating service life and maintenance cycles and data management. The example project Maintal Bridge Gemuenden as part of the AISTEC project shows the workflow for the implementation of structural health monitoring and experimental tests with a train of Deutsche Bahn. The influence lines, as one possible way for damage detection, were measured with a highly accurate GNSS System to locate the trains position when crossing the bridge. The results were compared to measurements from 1987 just before the bridge went in operation.
This presentation deals with the phenomenology and design of pile foundations for offshore wind turbines, and is divided into two lectures.
The second lecture continues with the case of laterally loaded offshore piles, which bears most relevance for the case of the monopile foundations. Here again, a clear separation between physical reality and design methods is intended.
Finally, the last part of the second lecture introduces several advanced topics which lie outside the classical design approaches, namely the hydromechanical coupling effects (i.e. the excess pore-pressure generation around the monopiles), the cyclic pile fatigue and the so-called pile setup (i.e. the time effects on the axial pile capacity). The relevance of the latter two topics is illustrated with experimental results from a field testing campaign on real large-scale piles.
This presentation deals with the phenomenology and design of pile foundations for offshore wind turbines, and is divided into two lectures.
The first lecture presents a brief introduction to the context and peculiarities of such foundations, and then focuses on the particular case of axially loaded piles. This part is most relevant for the relatively slender piles of the multi-pile substructures (i.e. jackets and tripods). A clear distinction between physical phenomenology and practical design is drawn here.
Almost all building materials in civil engineering have an open porosity and interact with or are affected by the environmental conditions. Structures might suffer from effects such as moisture adsorption, carbonation, corrosion, penetration of salt ions and chemical substances, etc. In the hygroscopic range, these processes are mostly driven by diffusion. Due to the confinement of small pores ( 1 m), the Knudsen effect reduces the molecular diffusion. This reduction can become more significant in case of temporal changing pore systems because of physisorption of water vapor, carbonation, or chemisorption.
In this study, unstabilised earth blocks and earth masonry are investigated. In a first step, the pore size distribution of the blocks is measured and sorption isotherms are recorded in experiments. Besides the ordinary physisorption, the involved clay minerals undergo swelling or shrinking due to chemisorption. The following two effects must be considered: first, the reduction of the available pore space by the adsorbed water layer. For this, the Hillerborg sorption theory is used, which is a combination of the well-known Brunauer-Emmett-Teller sorption theory and the Kelvin equation. This allows the computation of adsorbed water layers even in curved pore geometries. Second, the variation of the initial pore size distribution due to chemisorption needs to be modelled. Based on these two models, the effective diffusion coefficient can be predicted. For validation, arrays of relative humidity sensors were embedded into a free-standing earth masonry wall. This monitoring was carried out over more than a year to have a broad variety of environmental conditions and was located in Berlin, Germany.
The prediction of the effective diffusion coefficient can also be transferred to other processes and allows the investigation of materials having temporarily changing pore systems. Examples are the carbonation of cementitious materials, alkali silica reaction, calcium leaching of long-lasting structures, etc. This effect becomes most prominent in the meso-pore range and might alter the effective diffusion coefficient by more than 100 %.
Die VDI Richtlinie 3837 enthält detaillierte Angaben zur Erschütterungsemission. Die DIN 45672-3 enthält nur den Tunnel- oder einen Bodenmesspunkt als Ausgangspunkt der Prognose. Die Erschütterungsanregung durch die Fahrzeug-Fahrweg-Wechselwirkung wird beschrieben. Die ERgebnisse der BAM stimmen sehr gut mit dem Prognosekonzept von Highspeed 2 überein. Dies wird an den Punkten 1. Störgrößen, 2. Achsimpulse, 3. Tunnelstrecken aufgezeigt.