35 Dokumente gefunden
Nonlinear Analysis Models for the Static and Dynamic Behaviour of Structural Cables
Cables are integral to the structural stability of cable-supported structures, emphasising the need for improving assessment models in evaluating the structural condition of cable-supported structures. This work aims at enhancing the systematisation of cable models, and focuses on the analysis and system…
Methoden zur Charakterisierung, Modellierung und automatisierten Auswertung von Zustandsdaten im Kontext der digitalen Bauwerkserhaltung
Die Zustandserfassung von Bauwerken wird zunehmend von modernen Technologien unterstützt. Dazu gehören Verfahren zur Aufnahme geometrischer Daten, wie Punktwolken oder Meshes, Bilddaten oder Zeitreihen aus Sensoraufnahmen. Die bildbasierte Auswertung wird erweitert durch leistungsstarke Verarbeitungsverfahren,…
A novel partitioned numerical coupling between vortex particle method–structure–smoothed particle hydrodynamics models for…
The article introduces a novel weakly-partitioned numerical coupling method implemented to analyze the wind-induced response of low-damped structures incorporating a Tuned Liquid Damper (TLD). The proposed methodology integrates the meshless Vortex-Particle Method (VPM) for wind flow and Smoothed Particle…
Amsterdam: Elsevier, 2024-06-21
Pareto and Reliability-Oriented Aeroelastic Shape Optimization of Bridge Decks
Due to the development of new technologies and materials, optimized bridge design has recently gained more attention. The aim is to reduce the bridge components materials and the CO2 emission from the cement manufacturing process. Thus, most long-span bridges are designed to be with high flexibility,…
Weimar: Institut für Strukturmechanik, 2023-03-02
Integration and Comparison Methods for Multitemporal Image-Based 2D Annotations in Linked 3D Building Documentation
aus: Remote Sensing
Data acquisition systems and methods to capture high-resolution images or reconstruct 3D point clouds of existing structures are an effective way to document their as-is condition. These methods enable a detailed analysis of building surfaces, providing precise 3D representations. However, for the condition…
Basel: MDPI AG, 2022-05-09
Partitioned Algorithms using Vortex Particle Methods for Fluid−Structure Interaction of Thin-walled Flexible Structures
Structures under wind action can exhibit various aeroelastic interaction phenomena, which can lead to destructive and catastrophic events. Such unstable interaction can be beneficially used for small-scale aeroelastic energy harvesting. Proper understanding and prediction of fluid−structure interactions…
Weimar: arts + science Weimar GmbH, 2021-06-14
Comparison Metrics for Time-histories: Application to Bridge Aerodynamics
Wind effects can be critical for the design of lifelines such as long-span bridges. The existence of a significant number of aerodynamic force models, used to assess the performance of bridges, poses an important question regarding their comparison and validation. This study utilizes a unified set of…
New York: ASCE, 2020-06-23
On systematic approaches for interpreted information transfer of inspection data from bridge models to structural analysis
In conjunction with the improved methods of monitoring damage and degradation processes, the interest in reliability assessment of reinforced concrete bridges is increasing in recent years. Automated imagebased inspections of the structural surface provide valuable data to extract quantitative information…
Synergistic Framework for Analysis and Model Assessment in Bridge Aerodynamics and Aeroelasticity
Wind-induced vibrations often represent a major design criterion for long-span bridges. This work deals with the assessment and development of models for aerodynamic and aeroelastic analyses of long-span bridges. Computational Fluid Dynamics (CFD) and semi-analytical aerodynamic models are employed to…
Weimar: Bauhaus-Universitätsverlag, 2020-03-11
Prediction of aeroelastic response of bridge decks using artificial neural networks
The assessment of wind-induced vibrations is considered vital for the design of long-span bridges. The aim of this research is to develop a methodological framework for robust and efficient prediction strategies for complex aerodynamic phenomena using hybrid models that employ numerical analyses as well…
Nonlinear Analysis of Structures: Wind Induced Vibrations
The proceedings at hand are the result of the International Master Course Module: "Nonlinear Analysis of Structures: Wind Induced Vibrations" held at the Faculty of Civil Engineering at Bauhaus-University Weimar, Germany in the summer semester 2019 (April - August). This material summarizes the results…
Weimar: Universitätsverlag, 2019-11-22
Nonlinear Numerical Modelling of Cable Elements in Bridges for Dynamic Analysis
Identifying cable force with vibration-based methods has become widely used in engineering practice due to simplicity of application. The string taut theory provides a simple definition of the relationship between natural frequencies and the tension force of a cable. However, this theory assumes a perfectly…
Determination of complex aerodynamic admittance of bridge decks under deterministic gusts using the Vortex Particle Method
Long-span bridges are prone to wind-induced vibrations. Therefore, a reliable representation of the aerodynamic forces acting on a bridge deck is of a major significance for the design of such structures. This paper presents a systematic study of the two-dimensional (2D) fluid-structure interaction of…
Structural Optimization of Composite Cross-Sections and Elements using Energy Methods
Structural optimization has gained considerable attention in the design of structural engineering structures, especially in the preliminary phase. This study introduces an unconventional approach for structural optimization by utilizing the Energy method with Integral Material Behavior (EIM), based on…
Wireless Sensor Networks Composed of Standard Microcomputers and Smartphones for Applications in Structural Health Monitoring
aus: Sensors
Wireless sensor networks have attracted great attention for applications in structural health monitoring due to their ease of use, flexibility of deployment, and cost-effectiveness. This paper presents a software framework for WiFi-based wireless sensor networks composed of low-cost mass market single-board…
Basel: MDPI, 2019-05-03
A categorical perspective towards aerodynamic models for aeroelastic analyses of bridge decks
Reliable modelling in structural engineering is crucial for the serviceability and safety of structures. A huge variety of aerodynamic models for aeroelastic analyses of bridges poses natural questions on their complexity and thus, quality. Moreover, a direct comparison of aerodynamic models is typically…
London: Royal Soc. Publ., 2019-03-13
Weiterentwicklung der Zonenmethode für den Nachweis der Feuerwiderstandsdauer von rechteckigen Stahlbetondruckgliedern
Die Zonenmethode nach Hertz ist ein vereinfachtes Verfahren zur Heißbemessung von Stahlbetonbauteilen. Um eine händische Bemessung zu ermöglichen, werden daher verschiedene Annahmen und Vereinfachungen getroffen. Insbesondere werden die thermischen Dehnungen vernachlässigt und das mechanische Verhalten…
Weimar: Bauhaus-Universitätsverlag, 2018-10-17
Aeroelastic analyses of bridges using a Pseudo-3D vortex method and velocity-based synthetic turbulence generation
The accurate representation of aerodynamic forces is essential for a safe, yet reasonable design of long-span bridges subjected to wind effects. In this paper, a novel extension of the Pseudo-three-dimensional Vortex Particle Method (Pseudo-3D VPM) is presented for Computational Fluid Dynamics (CFD)…
A synergistic study of a CFD and semi-analytical models for aeroelastic analysis of bridges in turbulent wind conditions
Long-span bridges are prone to wind-induced vibrations. Therefore, a reliable representation of the aerodynamic forces acting on a bridge deck is of a major significance for the design of such structures. This paper presents a systematic study of the two-dimensional (2D) fluid-structure interaction of…
Thermisch-energetische Gebäudesimulation auf Basis eines Bauwerksinformationsmodells
Für eine Abschätzung des Heizwärmebedarfs von Gebäuden und Quartieren können thermisch-energetische Simulationen eingesetzt werden. Grundlage dieser Simulationen sind geometrische und physikalische Gebäudemodelle. Die Erstellung des geometrischen Modells erfolgt in der Regel auf Basis von Bauplänen oder…
Berlin: Bauhaus-Universität Weimar / Fakultät Bauingenieurwesen / Professur Modellierung und Simulation - Konstruktion, 2018-04-01