7.2 Ingenieurbau
Filtern
Dokumenttyp
- Vortrag (168)
- Beitrag zu einem Tagungsband (67)
- Zeitschriftenartikel (16)
- Posterpräsentation (10)
- Dissertation (4)
- Beitrag zu einem Sammelband (3)
- Buchkapitel (2)
- Tagungsband (Herausgeberschaft für den kompletten Band) (1)
- Sonstiges (1)
Sprache
- Englisch (196)
- Deutsch (75)
- Mehrsprachig (1)
Referierte Publikation
- nein (272) (entfernen)
Schlagworte
- Structural Health Monitoring (22)
- Ground vibration (18)
- Fatigue (12)
- Offshore wind energy (11)
- Structural health monitoring (11)
- Monitoring (10)
- Brücken (9)
- Offshore (9)
- Impact (8)
- Building vibration (7)
- Damage characterization (7)
- Planar tomography (7)
- Vibration measurements (7)
- Bahnerschütterungen (6)
- Design methods (6)
- Deterioration (6)
- Hammer impact (6)
- Layered soil (6)
- Model interpolation (6)
- Numerical modelling (6)
- Offshore wind turbines (6)
- Physical phenomenology (6)
- Pile foundations (6)
- Soil-structure interaction (6)
- Structural systems (6)
- Grout (5)
- Inspection (5)
- Numeric simulation (5)
- Reinforced concrete structure (5)
- SHM (5)
- Train passage (5)
- Train-induced ground vibration (5)
- Vibration (5)
- Bayesian updating (4)
- Container loading (4)
- Crack detection (4)
- Damage detection (4)
- Datenmanagement (4)
- Drop test (4)
- Environmental effects (4)
- Erschütterungen (4)
- Erschütterungsminderung (4)
- Excitation forces (4)
- Foundation load (4)
- Foundations (4)
- Gründungsstrukturen (4)
- High-strength concrete (4)
- Interface (4)
- Layered soils (4)
- Modalanalyse (4)
- Reliability (4)
- Repair (4)
- Shell Buckling (4)
- Slab track (4)
- Steel structures (4)
- Temperature rejection (4)
- Ultrasonic testing (4)
- Vehicle-track-soil interaction (4)
- Wind Energy (4)
- Windenergie (4)
- BIM (3)
- Belastungsversuch (3)
- Bridges (3)
- Buckling (3)
- Compaction Grouting (3)
- Damage localization (3)
- Deep foundations (3)
- Dispersionsmessung (3)
- Elastische Gleiselemente (3)
- Emission (3)
- Erosion (3)
- Erschütterungsprognose (3)
- Fault detection (3)
- Großer Fallturm Horstwalde (3)
- Inspection planning (3)
- Leichtbau (3)
- Maintenance (3)
- Material moisture (3)
- Mitigation (3)
- Monopiles (3)
- Offshore Pile Foundation (3)
- Offshore Windenergieanlagen (3)
- Offshore foundations (3)
- Offshore geomechanics (3)
- Physical testing (3)
- Probabilistic (3)
- Reinforced concrete (3)
- Schwingungsdynamik (3)
- Subspace methods (3)
- Temperature effects (3)
- Train speed (3)
- Tunnel (3)
- Vibration measurement (3)
- Wellengeschwindigkeit (3)
- Wind (3)
- Zivile Sicherheit (3)
- 2-span bridge (2)
- AISTEC (2)
- Acceleration sensors (2)
- Acoustic emission testing (2)
- Amplitude-charge weight laws (2)
- Amplitude-distance laws (2)
- Analysis of variance (2)
- Ansys Autodyn (2)
- Apartment building (2)
- Artificial intelligence (2)
- Attenuation (2)
- Automatisierte schweißtechnische Fertigung (2)
- Axle-sequence spectrum (2)
- Bayes'sche Analyse (2)
- Bayesian System Identification (2)
- Bayesian methods (2)
- Bemessung (2)
- Big Data (2)
- Bitumen (2)
- Bodenübertragungsfunktion (2)
- Box-Behnken (2)
- Brücke (2)
- Cable failure (2)
- Cable-stayed bridge (2)
- Changing process noise (2)
- Chemisoprtion (2)
- Climate chamber (2)
- Compressive Cyclic loading (2)
- Compressive cyclic loading (2)
- Compressive strength (2)
- Coupled fluid-particle simulation (2)
- Coupler systems (2)
- Crack formation (2)
- Crack pattern (2)
- Cracks (2)
- Cyclic load (2)
- DEM (2)
- DUCON® (2)
- Design (2)
- Digital twin (2)
- Displacements (2)
- Drone (2)
- Drucker-Prager (2)
- Ductility (2)
- E-modulus (2)
- Earth masonry (2)
- Elastische Elemente (2)
- Energy (2)
- Erschütterungsausbreitung (2)
- Evaluation (2)
- Explosion-induced ground vibrations (2)
- Faseroptik (2)
- Feuchte (2)
- Filter effects (2)
- Finite Elemente Simulation (2)
- Finite element models (2)
- Fly ash (2)
- Freight train (2)
- GPU parallel computation (2)
- Gleiströge (2)
- Ground vibration measurements (2)
- Grouted Connection (2)
- Grouted connection (2)
- Grouting (2)
- Halbraum (2)
- High-performance computing (2)
- High-speed (2)
- High-speed train (2)
- Immission (2)
- Injection Sequence (2)
- Irregularities (2)
- Klimakammer (2)
- Knudsen effect (2)
- Laboratory beam structure (2)
- Lehm (2)
- Linear parameter varying systems (2)
- Load vector (2)
- Long-term shrinkage (2)
- Macromechanical Sample Strength (2)
- Material tests (2)
- Mauerwerk (2)
- Measurement (2)
- Measurements (2)
- Messen im Bauwesen (2)
- Metakaolin (2)
- Micro silica (2)
- Micro-reinforcement (2)
- Micromechanical Tensile Failure (2)
- Micromechanical modelling (2)
- Mobile elements (2)
- Modal Analysis (2)
- Molecular diffusion (2)
- Non destructive testing (2)
- Non-destructive testing (2)
- Numerical model (2)
- Numerical modeling (2)
- Office tower (2)
- Offshore Wind Energy (2)
- Offshore Windenergy Pile Buckling (2)
- Offshore geotechnics (2)
- Offshore wind (2)
- Offshore wind turbine (2)
- Offshore-Windenergieanlagen (2)
- Optimal Sensor Placement (2)
- Passenger train (2)
- Physisorption (2)
- Pile Foundation (2)
- Pile Tip Buckling (2)
- Post-impact evaluation (2)
- Prediction (2)
- Prediction of explosion induced ground and building vibration (2)
- Prädiktive Instandhaltung (2)
- Quasi-static and dynamic tests (2)
- Radar (2)
- Railway (2)
- Railway bridge (2)
- Railway tunnel (2)
- Railways (2)
- Randomly heterogeneous soil (2)
- Rehabilitation (2)
- Reinforcement (2)
- Research data management (2)
- Risk (2)
- Risslumineszenz (2)
- SDDLV (2)
- Scattering (2)
- Schadensdetektion (2)
- Schwingungsbasierte Verfahren (2)
- Size effect (2)
- Slenderness effect (2)
- Soil properties (2)
- Soil-Structure-Interaction (2)
- Soil-pile interaction (2)
- Soil-wall-floor model (2)
- Static load (2)
- Statistical evaluation (2)
- Statistical method (2)
- Stereo photogrammetry (2)
- Subspace-based method (2)
- Subspace-based residual (2)
- Suction bucket (2)
- Supplementary cementitious materials (2)
- Surface-tunnel reduction (2)
- System Identification (2)
- Tensile Capacity (2)
- Time-variant reliability (2)
- Tomographic damage evaluation (2)
- Track damage (2)
- Train excitation (2)
- Transmission (2)
- UHPC (2)
- Umwelteinflüsse (2)
- Unterraummethoden (2)
- Value of Information (2)
- Vehicle-track interaction (2)
- Vibrations (2)
- Vollraum (2)
- Wellenausbreitung (2)
- Wellenausbreitung in der Tiefe (2)
- Wind Turbines (2)
- Windenergy (2)
- Zuggeschwindigkeit (2)
- Zuverlässigkeit (2)
- 3D imaging (1)
- Achsfolgespektren (1)
- Achsimpulse (1)
- Amplituden-Abstands-Gesetze (1)
- Analytical Design Methods (1)
- Artificial Intelligence (1)
- Asphalt (1)
- Assessment (1)
- Asymptotic local approach (1)
- Automatic modal parameters identification (1)
- Automatisierte Fertigung (1)
- Automatisierte schweißtechniche Fertigung (1)
- Axial load bearing (1)
- Axle impulses (1)
- Axle loads (1)
- Axle pulses (1)
- BAM Windenergie Fügetechnik (1)
- Bahngleis (1)
- Ballast track (1)
- Base isolation (1)
- Baugrunddynamik (1)
- Bauteile (1)
- Bauwerk-Boden-Wechselwirkung (1)
- Bauwerke (1)
- Bauwerksmonitoring (1)
- Bauwerksüberwachung (1)
- Bayesian analysis (1)
- Bayesian system identification (1)
- Beanspruchungszustand (1)
- Belastungsfahrt (1)
- Belastungszug (1)
- Beton (1)
- Betonautobahn (1)
- Betonautobahnen (1)
- Beulen (1)
- Bewertung (1)
- Bionik (1)
- Blast (1)
- Blast tests (1)
- Bodenschlitz (1)
- Bodenvariabilität (1)
- Boundary element method (1)
- Bridge (1)
- Bridge monitoring (1)
- Bruchlastwechselzahlen (1)
- Brückensicherheit (1)
- Buckling piles circular shells (1)
- Building information modelling (1)
- Building response (1)
- Bulging (1)
- CFD (1)
- Cars (1)
- Centerline solidification cracking (1)
- Chemisorption (1)
- Civil structures (1)
- Climate Chamber (1)
- Cohesive soils (1)
- Column/wall resonance (1)
- Combined finite-element boundary-element method (1)
- Components of excitation (1)
- Computer Vision (1)
- Concrete (1)
- Conductor (1)
- Crack (1)
- Crack Luminescence (1)
- Crack growth (1)
- Crack repair (1)
- Cyclic axial shearing (1)
- Cyclic degradation (1)
- DEM-LBM simulation (1)
- Damage Detection (1)
- Damage identification (1)
- Deckeneigenfrequenzen (1)
- Deckenschwingungen (1)
- Design models (1)
- Design practice (1)
- Detection (1)
- DiMoWind RDS-PP Maintenance Digital Twin Offshore Wind Energy (1)
- Digital Image Correlation (1)
- Digital Models (1)
- Digital Twin (1)
- Digitale Zwillinge (1)
- Digitalisierung (1)
- Drop Test (1)
- Drop Tests (1)
- Drop tower (1)
- Druckfestigkeit (1)
- Druckschwellenversuch (1)
- Dynamic loads (1)
- Dynamic soil properties (1)
- Dynamische Bodenkennwerte (1)
- Dynamische Bodensteifigkeit (1)
- Dämpfung (1)
- EERA Joint Program (1)
- Earth (1)
- Earth material (1)
- Earthen hydraulic constructions (1)
- Earthen hydraulic infrastructures (1)
- Einflusslinie (1)
- Einflusslinien (1)
- Einfügungsdämmung (1)
- Elastische Gebäudelagerung (1)
- End-of-life decision making (1)
- Entscheidungsfindung (1)
- Environmental (1)
- Environmental Effects (1)
- Environmental influence (1)
- Erhaltungsmanagement (1)
- Ermüdungsprüfung (1)
- Ermüdungsschäden (1)
- Ermüdungsverhalten (1)
- Erneuerbare Energien (1)
- Erosion of cohesive soils (1)
- Erschütterungen im Fernfeld (1)
- FEM (1)
- FEM analysis (1)
- Fahrzeug-Fahrweg-Boden-Wechselwirkung (1)
- Fallturm (1)
- Fatigue damage (1)
- Fatigue deterioration (1)
- Fiber optic sensing (1)
- Finite element method (1)
- Finite element model updating (1)
- Finite-Elemente-Modellkalibrierung (1)
- Flexibility (1)
- Flexible car body (1)
- Flexible wheelset (1)
- Floor resonance (1)
- Floors (1)
- Fluid-structure interaction (1)
- Footbridge (1)
- Force reconstruction (1)
- Foundation Pile (1)
- Foundation reliability analysis (1)
- Freileitung (1)
- Frequency response function (1)
- GMNIA (1)
- GNSS (1)
- GPU parallelisation (1)
- Gebäudelagerung (1)
- Gebäudemodelle (1)
- Gebäudeschwingungen (1)
- Geomechanics (1)
- Geomechanics of offshore foundations (1)
- Geometrie (1)
- Global ambient vibrations (1)
- Granular Cohesive Materials (1)
- Granular Cohesive Materials, (1)
- Ground (1)
- Grout Injection (1)
- HTLS (1)
- Hard impact (1)
- Harter Anprall an Stahlbetonstrukturen (1)
- High-Rise Building (1)
- High-rise buildings (1)
- Horizontal stress (1)
- IEPE (1)
- Impact damage of reinforced concrete (1)
- Impact damage on reinforced concrete (1)
- Impakt (1)
- Impedanzmethode (1)
- Inertial Interaction (1)
- Inertial interaction (1)
- Inhomogeneous soils (1)
- Innovative Messtechnik (1)
- Inspeciton (1)
- Inspektion (1)
- Interface model (1)
- Irregular ballast (1)
- Irregular soil (1)
- Jacket support structure (1)
- Jet erosion test (1)
- Kinematic Interaction (1)
- Kinematic interaction (1)
- Kraft auf den Boden (1)
- LBM-DEM (1)
- LBM-DEM coupling (1)
- LBM-DEM simulation (1)
- Laminography (1)
- Laser beam welding (1)
- Lateral load bearing (1)
- Leichtbauprinzipien (1)
- Load Test (1)
- Load bearing behaviour (1)
- Load-bearing (1)
- Long-span bridge (1)
- Low-frequency shaker (1)
- Luminescence (1)
- MEMS (1)
- Maintal Bridge Gemuenden (1)
- Maintalbrücke Gemünden (1)
- Maintenance Digital Twin Offshore Wind Energy (1)
- Marine geomechanics (1)
- Marine geotechnics (1)
- Maschinenbetrieb (1)
- Material Point Method (1)
- Material model (1)
- Measurement campaigns (1)
- Mechanical challenges (1)
- Messfahrt (1)
- Microfine cement (1)
- Micromechanical LBM-DEM simulation (1)
- Micromechanical analysis (1)
- Micromechanical simulation (1)
- Minderungsmaßnahmen (1)
- Mix design (1)
- Modal force spectrum (1)
- Modal load spectrum (1)
- Modal system identification (1)
- Model Update (1)
- Model updating (1)
- Modellierung (1)
- Modes (1)
- Modes and waves (1)
- Moisture (1)
- Monopile (1)
- Monopile Buckling (1)
- Monopile installation risks (1)
- Movin load test (1)
- Multi-beam method (1)
- Multiple impact (1)
- NDT (1)
- Nachgiebigkeiten (1)
- Nelson’s method (1)
- Non-Destructive Evaluation (1)
- Normung (1)
- Numerical analysis (1)
- Numerical damage simulation (1)
- Numerical simulation (1)
- Numerical simulation of impact damage (1)
- Numerical simulations (1)
- Offhore (1)
- Office building (1)
- Offshore Structures (1)
- Offshore Wind (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)
- Operational modal analysis (1)
- Optimierungsmethoden (1)
- Optimization techniques (1)
- Pfahlfußbeulen (1)
- Pfahlnachgiebigkeiten (1)
- Physisoprtion (1)
- Pile Buckling (1)
- Pile Capacity (1)
- Pile ageing (1)
- Pile groups (1)
- Pile retrofit system (1)
- Pile-Tip-Buckling (1)
- Point Cloud (1)
- Predictive maintenance (1)
- Probabilistic modelling (1)
- Probabilitische Ingenieurmodelle (1)
- Probability of Detection (1)
- Probability of detection (1)
- Probekörpergeometrien (1)
- Prognose (1)
- Propagation from a tunnel (1)
- Railbridge (1)
- Railway induced vibration (1)
- Railway track (1)
- Railway tracks (1)
- Railway trafiic (1)
- Randelementmethode (1)
- Rayleighwellendispersion (1)
- Rechenmodelle (1)
- Rechenverfahren (1)
- Repowering (1)
- Residential building (1)
- Residual evaluation (1)
- Richtige Fahrzeugmasse (1)
- Rigid vehicle model (1)
- Risiko (1)
- Risikoanalyse (1)
- Risk-based maintenance planning (1)
- Rissprozes (1)
- Rissprozess (1)
- Road bridges (1)
- SHM Environmental (1)
- Safety (1)
- Scaling (1)
- Scattered axle impulses (1)
- Schadensüberwachung (1)
- Scherwellengeschwindigkeit (1)
- Schienenfahrweg (1)
- Schienenfahrwege (1)
- Schubmodul (1)
- Schwingungsmessungen (1)
- Schwingungsmonitoring (1)
- Schädigungsprozesse (1)
- Sensitivity vectors (1)
- Shearing (1)
- Shrinkage (1)
- Sicherheit (1)
- Simple and fast prediction (1)
- Simple prediction (1)
- Simulation and experiment (1)
- Site-characterization (1)
- Soft impact (1)
- Soft track elements (1)
- Soil Struture Interaction (1)
- Soil erosion (1)
- Soil-building interaction (1)
- Soil-building resonance (1)
- Soil-wall floor model (1)
- Soil-water-structure interaction (1)
- Spatially varying ground conditions (1)
- Spektralanalyse (1)
- Stability Buckling soil-structure-interaction piles offshore (1)
- Stabilität (1)
- State of stress (1)
- Statistical correlations (1)
- Statistical tests (1)
- Statistische Auswertung (1)
- Statistische Korrelationen (1)
- Stochastic Subspace Damage Detection (1)
- Strength (1)
- Stress stiffening (1)
- Structural Systems (1)
- Structural integrity (1)
- Structural integrity maintenance (1)
- Structural integrity management (1)
- Strukturmonitoring (1)
- Störgrößen (1)
- Substructures (1)
- Support structures (1)
- Surface Foundation (1)
- Surface line (1)
- Switch (1)
- System identification (1)
- Systemidentifikation (1)
- TOP (1)
- Tagung (1)
- Temperatureinflüsse (1)
- Tensile test (1)
- Test specification (1)
- Tip Buckling (1)
- Track and vehicle irregularities (1)
- Track beam (1)
- Track damage monitoring (1)
- Track damage quantification (1)
- Track vibration (1)
- Track-soil interaction (1)
- Tragfähigkeit (1)
- Tragstrukturen (1)
- Train configuration (1)
- Train passages (1)
- Tran speed (1)
- Transfer fuction (1)
- Transfer function (1)
- Truss structures (1)
- Tunnel line (1)
- Tunnel-pile transfer (1)
- Tunnelstrecke (1)
- Turnout (1)
- Un- certainty (1)
- Uncertainty (1)
- Uncertainty in reference (1)
- Uncertainty quantification (1)
- Under-sleeper pads (1)
- Varying soil stiffness (1)
- Varying stiffness (1)
- Varying track stiffness (1)
- Vibration analysis (1)
- Vibration excitation (1)
- Vibration monitoring (1)
- Wahrscheinlichkeit (1)
- Water-structure interaction (1)
- Wave-Tower interaction (1)
- Wavenumber integrals (1)
- Wavenumber method (1)
- Waves (1)
- Welded (1)
- Wellenfeldberechnung (1)
- Wheelset accelerations (1)
- Wind Energy Structures (1)
- Wind energy (1)
- Wind turbines (1)
- Wind-farm aerodynamics (1)
- Windenergieanlagen (1)
- Windfarm wake analysis (1)
- Zerstreute Achsimpulse (1)
- building information modelling (1)
- elastische Gebäudelagerungen (1)
- fachwerkartige Stahltragwerken (1)
- risk, reliability, inspection planning, offshore wind turbines (1)
- structural health monitoring (1)
- structural integrity management (1)
- support structures (1)
- zerstreute Achslastimpulse (1)
- Übertragungsmatrizen (1)
- Überwachung (1)
Organisationseinheit der BAM
- 7.2 Ingenieurbau (272) (entfernen)
Measured train passages and hammer impacts in combination with track-soil calculation have been successfully used for the detection of damaged slab tracks. This approach is now extended to intact slab and ballast tracks. The vibrations of many tracks have been measured at several levels from rail, sleeper, track plate, base plate, base layer to the subsoil by velocity or acceleration sensors. The time histories have to be integrated once or twice to get the displacements. The displacement signals include an arbitrary time-dependent shift which must be eliminated or respected in the interpretation. On the other hand, the calculation of slab and ballast tracks have been done in frequency-wavenumber domain. The displacements along the track and the frequency-dependent compliance transfer functions can be calculated. The latter can be compared with the results of the hammer impacts on the track. The deformation of the track can be transformed to time histories for a whole train and compared to the measured train passages. Many slab (and ballast) tracks have been measured at different sites. The displacements of the tracks are presented, and the following parameters have been analysed in the measurement results: slab track vs. ballast track, different types of slab tracks, damaged slab tracks, different trains, switches at different measuring points, an elastic layer, the mortar layer, different soils at different places. The soil should have the dominant influence on the track-plate displacements. Slab and ballast track yield also big differences in maximum displacement and width of deformation. Some of the preceding aspects will be analysed in comparison of measurement and theory.
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.
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.
Wir zeigen, dass bei homogenen ausgeprägt sandartigen Böden mit statistisch ermittelten Korrelationen die dynamischen Bodensteifigkeiten mit einer Genauigkeit abgeschätzt werden können, die mit der Ungenauigkeit der seismischen Verfahren übereinstimmt. Mit zunehmenden Feinkornanteil werden die Unsicherheiten der statistischen Korrelationen größer. Bei stark überkonsolidierten glazialen Böden sollte von der Anwendung empirischer Korrelationen Abstand genommen werden.
Current standards like ISO 14837-32:2015 and DIN EN 1998-1/NA:2021 as well as prEN 1997-2:2022 allow for using correlations between the results of in-situ soil penetration tests and shear wave velocity (or shear modulus) to determine soil properties to be used in dynamic analyses. While the ISO and prEN standards even provide some recommendations on specific correlations to be used, the DIN standard does not. Due to the statistical nature of such correlations their general applicability has to be verified. We collected data sets from test sites from Germany as well as New Zealand at which cone penetration tests (CPT) as well as seismic site investigation methods were conducted. These sites comprise sandy soils as well as clayey soils, mixed soils as well as glacial soils. We compare the results of several correlations between CPT results and shear wave velocity. The accuracy of such correlations is assessed with respect to the accuracy of seismic in-situ tests. It turns out that for clean sands such correlations between CPT and Vs have a similar order of variability as seismic in-situ tests conducted at the same site. The higher the fines portion of the soil, the higher the variability of the statistical correlations, and consequently the less the general applicability. For glacial soils and other special soil types usage of statistical correlations to determine dynamic soil properties is not recommended.
Nowadays geotechnical engineering firms have powerful software tools to extent their consulting business also into dynamic soil-structure interaction, which before has been restricted to a rather small community of specialized experts in this field, and they certainly do. This is particularly true with respect to non-seismic sources, that is all kinds of human induced vibrations. Hence, there is a demand from clients as well as from contractors to have guidance on the requirements as well as the limits of numerical modelling of soil-structure interaction. From the literature as well as from relevant standards, recommendations for the numerical modelling of soil-structure interaction problems involving seismic actions are well known, e. g. ASCE/SEI 4-16. There are, however, some particularities when dealing with human-induced vibrations, which are absent in seismic analyses. For human-induced excitations very little specific guidance has been published in the past. A machine foundation on a homogeneous half space excited by harmonic loads with excitation frequency between 4 Hz and 64 Hz has been analysed by means of several commercially available software packages. Parametric studies have been performed to verify if recommendations for seismic soil-structure analyses are valid for non-seismic analyses as well. This paper provides details on the benchmark example and the most important conclusions from the undertaken parametric studies.
Am Beispiel von mehreren Bauvorhaben wird untersucht, mit welchen Unsicherheiten bei der Anwendung von Korrelationen zwischen Sondierergebnissen und Scherwellengeschwindigkeit zur Beschreibung der dynamischen Bodeneigenschaften gerechnet werden muss. Die Auswertung von Korrelationen aus der Literatur zur Abschätzung der Scherwellengeschwindigkeit aus Drucksondierdaten zeigt, dass bei homogenen Sandböden die Verteilung der Scherwellengeschwindigkeit über die Tiefe sehr gut wiedergegeben werden kann. Die Korrelationen haben dabei die Tendenz, den tatsächlichen Wert zu überschätzen. In den vorliegenden Fällen haben sich Überschätzungen zwischen 20 % und 50 % ergeben. Mit zunehmendem Feinkornanteil werden die Unsicherheiten aus den Korrelationen jedoch größer.
Die natürliche Variabilität des Bodens bewirkt, dass jegliche in-situ Messung dynamischer Bodenparameter stets nur den Untersuchungsort beschreiben, und jede Verwendung für benachbarte Orte bereits eine Extrapolation ist. Gleichzeitig ist die Ermittlung von Bodeneigenschaften in-situ mit erheblichen Kosten verbunden, insbesondere bei Standorten wie z. B. Offshore-Windparks. Im innerstädtischen Raum sind seismische Messungen wegen der vorhandenen Bebauung und Flächenversiegelungen nur eingeschränkt möglich. Es bietet sich daher an, indirekte Methoden auf Basis von Drucksondierungen anzuwenden, weil diese Untersuchungen inzwischen zum Standardrepertoire selbst bei kleineren Bauvorhaben gehören.
Der neue nationale Anhang zu DIN EN 1998-1 erlaubt die Anwendung von Korrelationen zwischen Sondierergebnissen und dynamischen Bodeneigenschaften zur Anwendung bei seismischen Standortanalysen. Es werden jedoch keine Hinweise zur Auswahl geeigneter Korrelationen gegeben. Mit ISO/TS 14837-32 liegt ein Standard vor, in dem sogar für sandartigen Boden und tonartigen Boden zwei konkrete Korrelationen zur Anwendung vorgeschlagen werden. Dasselbe gilt für den Entwurf des Eurocode 7-2, prEN 1997-2 von 2022.
Untersuchungen zeigen, dass seismische Verfahren, wenn sie nicht unter Labor-Freifeldbedingungen durchgeführt werden, signifikante Streuungen aufweisen. Sofern statistische Korrelationen eine Streuung aufweisen, die in derselben Größenordnung liegen wie Ergebnisse seismischer Verfahren, können beide Verfahren in Grundsatz alternativ eingesetzt werden.
Wir zeigen, dass bei homogenen ausgeprägt sandartigen Böden mit statistisch ermittelten Korrelationen die dynamischen Bodensteifigkeiten mit einer Genauigkeit abgeschätzt werden können, die mit der Ungenauigkeit der seismischen Verfahren übereinstimmt. Mit zunehmenden Feinkornanteil werden die Unsicherheiten der statistischen Korrelationen größer. Bei stark überkonsolidierten glazialen Böden sollte von der Anwendung empirischer Korrelationen Abstand genommen werden.
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.