Refine
Has Fulltext
- yes (484) (remove)
Document Type
- Conference Proceeding (336)
- Article (130)
- Doctoral Thesis (12)
- Master's Thesis (2)
- Working Paper (2)
- Preprint (1)
- Study Thesis (1)
Institute
- Professur Informatik im Bauwesen (484) (remove)
Keywords
- Modellierung (62)
- Bauwerk (48)
- Finite-Elemente-Methode (41)
- CAD (40)
- Verteiltes System (38)
- Bautechnik (30)
- Computerunterstütztes Verfahren (24)
- Produktmodell (24)
- Architektur (23)
- Simulation (22)
- Optimierung (21)
- Ingenieurbau (20)
- Internet (19)
- Lernendes System (19)
- Mehragentensystem (19)
- Planungsprozess (19)
- Baubetrieb (18)
- Bauplanung (18)
- Tragwerk (18)
- Bauwesen (16)
- Datenmanagement (14)
- Datenaustausch (13)
- Stahlbeton (12)
- Baustatik (11)
- Dreidimensionales Modell (11)
- Gebäude (11)
- Physikalisches Verfahren (11)
- Mobile Computing (10)
- Entscheidungsunterstützung (9)
- Funknetz (9)
- Hochschulbildung (9)
- Konzipieren <Technik> (9)
- Quaternion (9)
- Schale (9)
- Computerunterstütztes Lernen (8)
- Dynamische Belastung (8)
- Informationstechnik (8)
- Nichtlineares Phänomen (8)
- Objektmodell (8)
- Prozessmodell (8)
- Visualisierung (8)
- Wissensverarbeitung (8)
- Bauaufnahme (7)
- IFC (7)
- Lebenszyklus <Wirtschaft> (7)
- Mathematisches Modell (7)
- Projektmanagement (7)
- Software (7)
- Stadtplanung (7)
- Bruchmechanik (6)
- Brückenbau (6)
- Datenbank (6)
- Elastoplastizität (6)
- Forschungskooperation (6)
- Fuzzy-Logik (6)
- Geoinformationssystem (6)
- Langzeitverhalten (6)
- Verkehrsplanung (6)
- Wissensmanagement (6)
- BIM (5)
- Bauablauf (5)
- Bauindustrie (5)
- Bauteil (5)
- Beton (5)
- Computer Supported Cooperative Work (5)
- Controlling (5)
- Datenerfassung (5)
- Datenmodell (5)
- Europa (5)
- Forschung (5)
- Framework <Informatik> (5)
- Geotechnik (5)
- Informationsmanagement (5)
- Planung (5)
- Stahlbau (5)
- Tragverhalten (5)
- Transportproblem (5)
- Versionsverwaltung (5)
- Virtuelle Realität (5)
- Öffentlicher Personennahverkehr (5)
- Angewandte Informatik (4)
- Angewandte Mathematik (4)
- Anwendung (4)
- Bauablauf / Ablaufplanung (4)
- Baukonstruktion (4)
- Benutzeroberfläche (4)
- Building Information Modeling (4)
- Entscheidung bei mehrfacher Zielsetzung (4)
- Gebäudeleittechnik (4)
- Genetischer Algorithmus (4)
- Graphentheorie (4)
- Informationssystem (4)
- Petri-Netz (4)
- Rissbildung (4)
- Schwingung (4)
- Sicherheit (4)
- Standardisierung (4)
- Stochastisches Modell (4)
- Straßenbau (4)
- Transportables Gerät (4)
- Verkehrsnetz (4)
- Zeitabhängigkeit (4)
- Zufallsvariable (4)
- API (3)
- Ablaufplanung (3)
- Bauausführung (3)
- Bauinformatik (3)
- Baustelle (3)
- Bauvorhaben (3)
- Bauzeichnung (3)
- Belastung (3)
- Bewehrung (3)
- Boden-Bauwerk-Wechselwirkung (3)
- Brandschutz (3)
- Data, information and knowledge modeling in civil engineering; Function theoretic methods and PDE in engineering sciences; Mathematical methods for (robotics and) computer vision; Numerical modeling in engineering; Optimization in engineering applications (3)
- Erdbebenbelastung (3)
- Facility-Management (3)
- Gleichgewicht (3)
- Grenzzustand (3)
- Informatik (3)
- Informationsmodell (3)
- Management (3)
- Neuronales Netz (3)
- Nichtlineare Mechanik (3)
- Numerisches Verfahren (3)
- Objektorientierung (3)
- Parameteridentifikation (3)
- Prozessmanagement (3)
- Rechnernetz (3)
- Scheduling (3)
- Stahlkonstruktion (3)
- Textilfaser (3)
- Wahrscheinlichkeitsrechnung (3)
- Wavelet (3)
- XML (3)
- Zuverlässigkeit (3)
- Algorithmus (2)
- Animation (2)
- Approximation (2)
- Ausschreibung (2)
- Aussteifung (2)
- Balken (2)
- Bauentwurf (2)
- Bauschaden (2)
- Bedarfsermittlung (2)
- Bewertung (2)
- Bildverarbeitung (2)
- Breitbandausbau (2)
- Building Information Model (2)
- CAD / Architektur (2)
- Computerunterstützter Unterricht (2)
- Data-Warehouse-Konzept (2)
- Datenverwaltung (2)
- Dialogsystem (2)
- Digitalisierung (2)
- Diskrete Optimierung (2)
- Dokumentenverwaltungssystem (2)
- Dreidimensionales CAD (2)
- Dynamik (2)
- Dünnwandiges Bauelement (2)
- Eigenwert (2)
- Entscheidungsunterstützungssystem (2)
- Entwurf (2)
- Festkörpermechanik (2)
- Flüssigkeit-Bauwerk-Wechselwirkung (2)
- Fraktal (2)
- Freie Schwingung (2)
- Geschichtetes Medium (2)
- Graphische Benutzeroberfläche (2)
- Grundwasser (2)
- Haus (2)
- Holzbau (2)
- Informationsaustausch (2)
- Infrastruktur (2)
- Instandhaltung (2)
- Integrierte Planung (2)
- Klein- und Mittelbetrieb (2)
- Kommunikationstechnik (2)
- Kontinuum (2)
- Kooperation (2)
- Kooperatives Informationssystem (2)
- Kostenoptimierung (2)
- Künstliche Intelligenz (2)
- Lebensdauer (2)
- Marketing (2)
- Matrizenrechnung (2)
- Mechanische Eigenschaft (2)
- Mensch-Maschine-Kommunikation (2)
- Modell (2)
- Monitorüberwachung (2)
- Netzwerk (2)
- Orthotropes Bauteil (2)
- Parallelverarbeitung (2)
- Plastizitätstheorie (2)
- Platte (2)
- Produktinformation (2)
- Produktionsplanung (2)
- Prognose (2)
- Prozessoptimierung (2)
- Rahmentragwerk (2)
- Raumtragwerk (2)
- Reihenfolgeproblem (2)
- Rekonstruktion (2)
- STEP (2)
- Sandwichbauweise (2)
- Schnittstelle (2)
- Skelettbau (2)
- Stabilität (2)
- Terminplanung (2)
- Tunnel (2)
- Umweltfaktor (2)
- Verkehr (2)
- Virtuelles Unternehmen (2)
- Wasserbau (2)
- Windlast (2)
- 4D (1)
- 4D-Simulation (1)
- 5G (1)
- ANSYS (1)
- Ablauf (1)
- Abtastung (1)
- Adaptive sampling method (1)
- Adaptives System (1)
- Aktive Integration (1)
- Altbaumodernisierung (1)
- Ampelmodell (1)
- Amplitude (1)
- Anpassung (1)
- Architektur <Informatik> (1)
- Aufwindkraftwerk (1)
- Ausbildung (1)
- Autobahn (1)
- Automatische Identifikation (1)
- Automatisiertes System (1)
- Bandmatrix (1)
- Bauablaufplan (1)
- Bauablaufplanung (1)
- Bauauftragsrechnung (1)
- Bauführung (1)
- Baugrund (1)
- Bauingenieurstudium (1)
- Baukosten (1)
- Bauphysik (1)
- Bausubstanz (1)
- Bauwerk / Technische Überwachung (1)
- Bauwerksinformationsmodell (1)
- Bauwerksplanung (1)
- Bauzustand (1)
- Bedarfsforschung (1)
- Behinderte (1)
- Beleuchtung (1)
- Beltrami-Gleichung (1)
- Benut (1)
- Benutzer / Beteiligung (1)
- Benutzer-entworfene Wohnungen (1)
- Berechnung (1)
- Berlin (1)
- Berührungslose Messung (1)
- Beschränkung (1)
- Betonbrücke (1)
- Betriebskosten (1)
- Betriebsmittel (1)
- Betriebswirtschaft (1)
- Beulung (1)
- Beurteilung (1)
- Bewertungssystem (1)
- Bewirtschaftung (1)
- Biegemoment (1)
- Bildanalyse (1)
- Bodenmechanik (1)
- Bogenbrücke (1)
- Bogenstaumauer (1)
- Boolean Operations (1)
- Boolesche Operationen (1)
- Brandgefahr (1)
- Brep (1)
- Brücke (1)
- Building Object Model (1)
- Busspur (1)
- CAE (1)
- COM (1)
- CORBA (1)
- CVS <Programm> (1)
- Cauchy-Riemannsche Differentialgleichungen (1)
- Chaostheorie (1)
- China (1)
- Chirale Verbindungen (1)
- Computer Aided Progress Monitoring (1)
- Computergestütztes Verfahren (1)
- Computergraphik (1)
- Constraint <Künstliche Intelligenz> (1)
- Constraintnetz (1)
- Construction Product data (1)
- Construction Sequence (1)
- Customizing (1)
- Dammbau (1)
- Data, information and knowledge modeling in civil engineering (1)
- Datenbanksystem (1)
- Datenbankverwaltung (1)
- Dateneingabegerät (1)
- Demontage (1)
- Dialogprogrammierung (1)
- Dickwandiges Bauelement (1)
- Differentialoperator (1)
- Digitales Bautagebuch (1)
- Digitales Modell (1)
- Dirac-Gleichung (1)
- Diskrete Fourier-Transformation (1)
- Distributed computing (1)
- Dreidimensionale Comp (1)
- Dreieck (1)
- Druckbelastung (1)
- EXPRESS <Programmiersprache> (1)
- Early design stage (1)
- Echtzeitsystem (1)
- Echtzeitverarbeitung (1)
- Editor (1)
- Eigenwertproblem (1)
- Einfamilienhaus (1)
- Einsturz (1)
- Eisenbahnbrücke (1)
- Elastizitätstheorie (1)
- Elastomer (1)
- Elektromagnetisches Feld (1)
- Elektronischer Produktkatalog (1)
- Ellipsoid (1)
- Emission (1)
- Energiemanagement (1)
- Energieversorgung (1)
- Entity-Relationship-Datenmodell (1)
- Entropie (1)
- Entscheidungstheorie (1)
- Erdbebenschutz (1)
- Ereignisgesteuerte Prozeßkette (1)
- Event-driven Process Chain (1)
- Exchanged Documents (1)
- Expertensystem (1)
- FTTx (1)
- Faktor <Algebra> (1)
- Fallbasiertes Schließen (1)
- Farbenlehre (1)
- Fehler (1)
- Fertigbau (1)
- Finite-Streifen (1)
- Finite-Streifen-Methode (1)
- Function theoretic methods and PDE in engineering sciences (1)
- Funktionsraum / Mathematik (1)
- Fuzzifizierung (1)
- Fuzzy-Optimierung (1)
- GTDS (1)
- Gebäudeleitsystem (1)
- Generelle-Interessen-Skala (1)
- Generierung (1)
- Geographic Information System (1)
- Gesamtbauwerk (1)
- Geschossbau (1)
- Gigabit (1)
- Gittererzeugung (1)
- Glasfaser (1)
- Glasfasernetze (1)
- Global sensitivity analysis (1)
- Graph (1)
- Green-Funktion (1)
- Grenzlast (1)
- Großbaustelle (1)
- Großtafelbau (1)
- Gruppentheorie (1)
- Gründung (1)
- Halbraum (1)
- Hamilton-Operator (1)
- Heizung (1)
- Hermitesche Entwicklung (1)
- Heuristik (1)
- Himmelslichtquotient (1)
- Hochgeschwindigkeitsnetz (1)
- Hochhaus (1)
- Hubbard (1)
- Hydrodynamik (1)
- Hängebrücke (1)
- Immobilienwirtschaft (1)
- Industriepark (1)
- Industry Foundation Classes (IFC) (1)
- Infrastrukturplanung (1)
- Ingenieurbüro (1)
- Ingenieurholzbau (1)
- Intelligentes System (1)
- Interaktive numerische Simulation (1)
- Investitionsplanung (1)
- Iran (1)
- Isogeometric Analysis (1)
- Isotropie (1)
- Iteration (1)
- Kalkulation (1)
- Kapitalwertmethode (1)
- Kartierung (1)
- Katastrophenmanagement (1)
- Kennzahl (1)
- Kernel <Informatik> (1)
- Kette (1)
- Klein- und mittelstädtisches Unternehmen (1)
- Knowledge modelling (1)
- Kollaboration (1)
- Kommunikationsdienst (1)
- Kommunikationsmodell (1)
- Kommunikationsprotokoll (1)
- Komplexe Funktion (1)
- Konforme Abbildung (1)
- Konsistenz <Informatik> (1)
- Konstruktion (1)
- Konstruktionsfehler (1)
- Konvektion (1)
- Kooperatives Arbeiten (1)
- Korrosion (1)
- Kostenanalyse (1)
- Kostenrechnung (1)
- Kraftmethode (1)
- Kran (1)
- Krankenhaus (1)
- Kreis (1)
- Kriechen (1)
- Kuppel (1)
- Laidlaw (1)
- Laplace-Transformation (1)
- Least-squares support vector regression (1)
- Lebenszyklus (1)
- Lebenszykluskonzept (1)
- Lehrter Bahnhof (1)
- Leitsystem (1)
- Luft (1)
- Luftverunreinigender Stoff (1)
- Lüftung (1)
- Managementinformationssystem (1)
- Managment Information System (1)
- Maple (1)
- Markoffsche Kette (1)
- Markowschke (1)
- Materialermüdung (1)
- Materialflusssteuerung (1)
- Mathematical methods for (robotics and) computer vision (1)
- Mathematische Physik (1)
- Mauerwerk (1)
- Maxwellsche Gleichungen (1)
- Mehrdimensionalität (1)
- Mesh quality (1)
- Messtechnik (1)
- Metall verarbeitende Industrie (1)
- Methoden und Verfahren (1)
- Microsoft dot net (1)
- Modalanalyse (1)
- Monte-Carlo-Simulation (1)
- Multiresolution analysis (1)
- Mustererkennung (1)
- NURBS (1)
- Navier-Stokes-Gleichung (1)
- Netzplantechnik (1)
- Netzwerktheorie (1)
- Nichtlineare Optimierung (1)
- Nichtlineare partielle Differentialgleichung (1)
- Nichtlineares System (1)
- Nichtlinearität (1)
- Niedrigenergiehaus (1)
- Norm <Normung> (1)
- Normung (1)
- Numerical modeling in engineering (1)
- Nutzeroberfläche (1)
- Nutzungsänderung (1)
- OIP (1)
- Oberfläche (1)
- Object-oriented programming (1)
- Objektorientierte Programmierung (1)
- Objektorientiertes Datenbanksystem (1)
- Objektversionierung (1)
- Oktalbaum (1)
- Operations Research (1)
- Optimal Planning (1)
- Optimization in engineering applications (1)
- Passivhaus (1)
- Pflasterungen (Mathematik) (1)
- Photogrammetrie (1)
- Planning process (1)
- Planungswerkzeugen (1)
- Plastische Deformation (1)
- Polyharmonische Funktion (1)
- Polystyrol (1)
- Problemlösen (1)
- Procedural modeling (1)
- Produktionssteuerung (1)
- Programm (1)
- Progressive Planung (1)
- Projektdokumentation (1)
- Projektfinanzierung (1)
- Projektierungsbetrieb (1)
- Projektplanung (1)
- Projektsteuerung (1)
- Prozesssimulation (1)
- Qp-spaces (1)
- Quantenphysik (1)
- RFID (1)
- Randelemente-Methode (1)
- Randspannung (1)
- Raumordnung (1)
- Rechteck (1)
- Regelungssystem (1)
- Regelungstechnik (1)
- Regenwasser (1)
- Regressionsanalyse (1)
- Reparatur (1)
- Ressourcenallokation (1)
- Revitalisierung (1)
- Rippendecke (1)
- Robustheit (1)
- SARS (1)
- SDOF (1)
- Sampling (1)
- Sandwichbauteil (1)
- Schadstoffkonzentration (1)
- Schalung (1)
- Scherung (1)
- Schlussfolgern (1)
- Schulgebäude (1)
- Schwingungsdämpfer (1)
- Sensitivitätsanalyse (1)
- Setzung (1)
- Shore Spacing (1)
- Shore Stiffness (1)
- Shoring System (1)
- Sichtbeton (1)
- Software Engineering (1)
- Software-Architektur (1)
- Software-Komponente (1)
- Softwareengineering (1)
- Softwareentwicklung (1)
- Softwaresystem (1)
- Sonnenenergie (1)
- Sonnenscheindauer (1)
- Sonnenstrahlung (1)
- Spannender Baum (1)
- Spannung (1)
- Spannungsintensitätsfaktor (1)
- Spline-Approximation (1)
- Stabilisierung (1)
- Stabwerk (1)
- Stadtentwässerung (1)
- Stadtverkehr (1)
- Stahlbetonbauteil (1)
- Stahlbrücke (1)
- Standard (1)
- Standard-Software (1)
- Standardsoftware (1)
- Standortplanung (1)
- Stapelproblem (1)
- Statik (1)
- Statische Last (1)
- Stochastik (1)
- Stochastischer Prozess (1)
- Stoffgesetz (1)
- Stoffkreislauf (1)
- Stokes-Problem (1)
- Straße (1)
- Straßenbrücke (1)
- Straßenkarte (1)
- Strukturanalyse (1)
- Strukturvergleich (1)
- Strömungsmechanik (1)
- Supply Chain Management (1)
- Surrogate models (1)
- Synchronisierung (1)
- Systemidentifikation (1)
- Tafelbau (1)
- Talsperre (1)
- Teamorganisation (1)
- Teamwork (1)
- Technische Mechanik (1)
- Teilung (1)
- Temperatur (1)
- Templates (1)
- Theorie zweiter Ordnung (1)
- Tragwerk / Vorspannung (1)
- Tragwerksplanung (1)
- Trajektorie (Mathematik) (1)
- Transformation (1)
- Transport (1)
- Trassierung (1)
- Trägheit (1)
- Tunnelbau (1)
- Turmdrehkran (1)
- Unsicherheit (1)
- Unternehmen (1)
- Unternehmen / Organisation (1)
- VRML (1)
- Variantenvergleich (1)
- Variationsrechnung (1)
- Vektorfunktion (1)
- Verbundbauweise (1)
- Verbunddokument (1)
- Verbundtragwerk (1)
- Verbundwerkstoff (1)
- Verkehrsaufkommen (1)
- Verkehrsleitsystem (1)
- Verkehrsmittelwahl (1)
- Vernetztes System (1)
- Versagen (1)
- Version control (1)
- Versionsabgleich (1)
- Versionskontrolle (1)
- Versionsverschmelzung (1)
- Versorgungsnetz (1)
- Verteilte Anwendungen (1)
- Verteilte Modelle (1)
- Verteiltes Datenbanksystem (1)
- Verteiltes Datenverarbeitungssystem (1)
- Verteiltes Softwaresystem (1)
- Vertrag (1)
- Viereck (1)
- Viskoelastisches Gelenk (1)
- Viskoplastizität (1)
- Vorfertigung (1)
- Vorgespannte Konstruktion (1)
- Vorspannung (1)
- Wartezeit (1)
- Wasserkraftwerk (1)
- Wechselwirkung (1)
- Weimar / Herzogin-Anna-Amalia-Bibliothek (1)
- Werkstoffprüfung (1)
- Wirtschaftlichkeit (1)
- Wissensmodellierung (1)
- Wohnung (1)
- Work Face (1)
- World Wide Web (1)
- Wärme (1)
- Wärmestrom (1)
- Zeitrestriktion (1)
- Zugstab (1)
- Zusammengesetzte Fließbedingung (1)
- Zuverlässigkeitstheorie (1)
- adaption (1)
- anforderungsorientierte Projektabwicklung (1)
- applets (1)
- automation (1)
- building (1)
- building Information model (1)
- cable force (1)
- cable stayed bridge (1)
- civil engineer . active integration (1)
- communications service (1)
- comparison of structure (1)
- computergestützte Baufortschrittskontrolle (1)
- concurrency control (1)
- construction (1)
- construction industry (1)
- construction management (1)
- construction schedule (1)
- cooperation (1)
- course of events (1)
- data collection (1)
- decision making (1)
- distributed applications (1)
- distributed models (1)
- editor (1)
- foundation (1)
- function spaces (1)
- generation (1)
- group document (1)
- initial equilibrium state (1)
- initial shape (1)
- internetbasierte Projektplattform (1)
- knowledge exchange (1)
- learning objects (1)
- merge (1)
- methodes and procedures (1)
- multi-criterion analysis (1)
- object splitting (1)
- object versioning (1)
- product and process models (1)
- pull learning (1)
- reconciliation (1)
- repository (1)
- reusability (1)
- räumliche Anfragesprache (1)
- scheduling (1)
- software architecture (1)
- software component (1)
- spatial query (1)
- standard (1)
- standard software (1)
- structural design (1)
- structural engineering (1)
- system (1)
- transparency (1)
- user interface (1)
- versioning (1)
- versions (1)
- web-based learning (1)
- Änderung (1)
- Überwachung (1)
The contribution introduces a method for the distributed process modelling in order to support the process orientation in Structural Engineering, i.e., the modelling, analysis and management of planning processes. The approach is based on the Petri Net theory for the modelling of planning processes and workflows in Structural Engineering. Firstly, a central and coarse process model serves as a pre-structuring system for the detailed modelling of the technical planning activities. Secondly, the involved planning participants generate distributed process models with detailed technical workflow information. Finally, these distributed process models will be combined in the central workflow net. The final net is of great importance for the process orientation in Structural Engineering, i.e., the identification, publication, analysis, optimization and finally the management of planning processes.
In many engineering applications two or more different interacting systems require the numer-ical solution of so-called multifield problems. In civil engineering the interaction of fluid and structures plays an important role, i.e. for fabric tensile structures of light and flexible materials often used for large roof systems, capacious umbrellas or canopies. Whereas powerful numerical simulation techniques have been established in structural engineering as well as in fluid mechan-ics, only relatively few approaches to simulate the interaction of fluids with civil engineering constructions have been presented. To determine the wind loads on complex structures, it is still state-of-the-art to apply semi-empirical, strongly simplifying methods or to perform expensive ex-periments in wind tunnels. In this paper an approach of a coupled fluid-structure simulation will be presented for membrane and thin shell structures. The interaction is described by the struc-tural deformation as response to wind forces, resulting in a modification of the fluid flow domain. Besides a realistic determination of the wind loads, information on the structural stability can be obtained. The so-called partitioned solution is based on an iterative frame algorithm, integrating different codes for Computational Fluid Dynamics (CFD) and for Computational Structural Dy-namics (CSD) in an explicit or an implicit time-stepping procedure. All data exchange between the two different applications is performed via a neutral geometric model provided by a coupling interface. A conservative interpolation method is used for the interpolation of the nodal loads. The time-dependent motion of the structure requires a dynamic modification of the different grids and a redefinition of the Navier-Stokes equations in an Arbitrary Langrangian Eulerian (ALE) formulation. As an example for the present implementation, results of a coupled fluid-structure simulation for a textile membrane canopy will be presented.
The truss model for predicting shear resistance of reinforced concrete beams has usually been criticized because of its underestimation of the concrete shear strength especially for beams with low shear reinforcement. Two challengers are commonly encountered in any truss model and are responsible for its inaccurate shear strength prediction. First: the cracking angle is usually assumed empirically and second the shear contribution of the arching action is usually neglected. This research introduces a nouvelle approach, by using Artificial Neural Network (ANN) for accurately evaluating the shear cracking angle of reinforced and prestressed concrete beams. The model inputs include the beam geometry, concrete strength, the shear reinforcement ratio and the prestressing stress if any. ...
The paper is about model based parameter identification and damage localization of elastomechanical systems using input and output measurements in the frequency domain. An adaptation of the Projective Input Residual Method to subsystem damage identification is presented. For this purpose the projected residuals were adapted with respect to a given subsystem to be analysed. Based on the gradients of these projected subsystem residuals a damage indicator was introduced which is sensitive to parameter changes and structural damages in this subsystem. Since the computations are done w.r.t. the smaller dimension of a subsystem this indicator shows a computational performance gain compared to the non-subsystem approach. This gain in efficiency makes the indicator applicable in online-monitoring and online-damage-diagnosis where continuous and fast data processing is required. The presented application of the indicator to a gantry robot could illustrate the ability of the indicator to indicate and locate real damage of a complex structure. Since in civil engineering applications the system input is often unknown, further investigations will focus on the output-only case since the generalization of the presented methods to this case will broaden its application spectrum.
For the analysis of arbitrary, by Finite Elements discretized shell structures, an efficient numerical simulation strategy with quadratic convergence including geometrically and physically nonlinear effects will be presented. In the beginning, a Finite-Rotation shell theory allowing constant shear deformations across the shell thickness is given in an isoparametric formulation. The assumed-strain concept enables the derivation of a locking-free finite element. The Layered Approach will be applied to ensure a sufficiently precise prediction of the propagation of plastic zones even throughout the shell thickness. The Riks-Wempner-Wessels global iteration scheme will be enhanced by a Line-Search procedure to ensure the tracing of nonlinear deformation paths with rather great load steps even in the post-peak range. The elastic-plastic material model includes isotropic hardening. A new Operator-Split return algorithm ensures considerably exact solution of the initial-value problem even for greater load steps. The combination with consistently linearized constitutive equations ensures quadratic convergence in a close neighbourhood to the exact solution. Finally, several examples will demonstrate accuracy and numerical efficiency of the developed algorithm.
A Multi-objective Model for Optimizing Construction Planning of Repetitive Infrastructure Projects
(2004)
This paper presents the development of a model for optimizing resource utilization in repetitive infrastructure projects. The model provides the capability of simultaneous minimization of both project duration and work interruptions for construction crews. The model provides in a single run, a set of nondominated solutions that represent the tradeoff between these two objectives. The model incorporates a multiobjective genetic algorithm and scheduling algorithm. The model initially generates a randomly selected set of solutions that evolves to a near optimal set of tradeoff solutions in subsequent generations. Each solution represents a unique scheduling solution that is associated with certain project duration and a number of interruption days for utilized construction crews. As such, the model provides project planners with alternative schedules along with their expected duration and resource utilization efficiency.
This paper focuses on a new three-level discretisation strategy which enables the transition between continuum/structural (I) and structural/black box modelling (II). The transition (I) is realised by means of a model adaptive concept based on an innovative finite element technology. For transition (II) we apply the truncated balanced realisation method (TBR). The latter represents an established system theoretical model reduction technique which is here combined with a novel substructure technique. The approach provides a modular concept to facilitate the computational analysis of complex structures. The final goal is to apply the strategy to life time estimation.
A geometrical inclusion-matrix model for the finite element analysis of concrete at multiple scales
(2003)
This paper introduces a method to generate adequate inclusion-matrix geometries of concrete in two and three dimensions, which are independent of any specific numerical discretization. The article starts with an analysis on shapes of natural aggregates and discusses corresponding mathematical realizations. As a first prototype a two-dimensional generation of a mesoscale model is introduced. Particle size distribution functions are analysed and prepared for simulating an adequate three-dimensional representation of the aggregates within a concrete structure. A sample geometry of a three-dimensional test cube is generated and the finite element analysis of its heterogeneous geometry by a uniform mesh is presented. Concluding, aspects of a multiscale analysis are discussed and possible enhancements are proposed.
A comprehensive framework of information management system for construction projects in China has been established through extensive literature survey and field investigation. It utilizes the potential information technologies and covers the practical management patterns as well as the major aspects of construction project management. It can be used to guide and evaluate the design of the information management systems for construction projects in order to make the system to be applicable to a wide variety of construction projects and survive the changes in project management.
This paper describes a framework for computer-aided conceptual design of building structures that results from building architectural considerations. The central task that is carried out during conceptual design is the synthesis of the structural system. This paper proposes a methodology for the synthesis of structural solutions. Given the nature of architectural constraints, user-model interactivity is devised as the most suitable computer methodology for driving the structural synthesis process. Taking advantage of the hierarchical organization of the structural system, this research proposes a top-down approach for structural synthesis. Through hierarchical refinement, the approach lends itself to the synthesis of global and local structural solutions. The components required for implementing the proposed methodology are briefly described. The main components have been incorporated in a proof-of-concept prototype that is being tested and validated with actual buildings.
Iso-parametric finite elements with linear shape functions show in general a too stiff element behavior, called locking. By the investigation of structural parts under bending loading the so-called shear locking appears, because these elements can not reproduce pure bending modes. Many studies dealt with the locking problem and a number of methods to avoid the undesirable effects have been developed. Two well known methods are the >Assumed Natural Strain< (ANS) method and the >Enhanced Assumed Strain< (EAS) method. In this study the EAS method is applied to a four-node plane element with four EAS-parameters. The paper will describe the well-known linear formulation, its extension to nonlinear materials and the modeling of material uncertainties with random fields. For nonlinear material behavior the EAS parameters can not be determined directly. Here the problem is solved by using an internal iteration at the element level, which is much more efficient and stable than the determination via a global iteration. To verify the deterministic element behavior the results of common test examples are presented for linear and nonlinear materials. The modeling of material uncertainties is done by point-discretized random fields. To show the applicability of the element for stochastic finite element calculations Latin Hypercube Sampling was applied to investigate the stochastic hardening behavior of a cantilever beam with nonlinear material. The enhanced linear element can be applied as an alternative to higher-order finite elements where more nodes are necessary. The presented element formulation can be used in a similar manner to improve stochastic linear solid elements.
Business and engineering knowledge in AEC/FM is captured mainly implicitly in project and corporate document repositories. Even with the increasing integration of model-based systems with project information spaces, a large percentage of the information exchange will further on rely on isolated and rather poorly structured text documents. In this paper we propose an approach enabling the use of product model data as a primary source of engineering knowledge to support information externalisation from relevant construction documents, to provide for domain-specific information retrieval, and to help in re-organising and re-contextualising documents in accordance to the user’s discipline-specific tasks and information needs. Suggested is a retrieval and mining framework combining methods for analysing text documents, filtering product models and reasoning on Bayesian networks to explicitly represent the content of text repositories in personalisable semantic content networks. We describe the proposed basic network that can be realised on short-term using minimal product model information as well as various extensions towards a full-fledged added value integration of document-based and model-based information.
The methods currently used for scheduling building processes have some major advantages as well as disadvantages. The main advantages are the arrangement of the tasks of a project in a clear, easily readable form and the calculation of valuable information like critical paths. The main disadvantage on the other hand is the inflexibility of the model caused by the modeling paradigms. Small changes of the modeled information strongly influence the whole model and lead to the need to change many more details in the plan. In this article an approach is introduced allowing the creation of more flexible schedules. It aims towards a more robust model that lowers the need to change more than a few information while being able to calculate the important propositions of the known models and leading to further valuable conclusions.
A Flexible Model for Incorporating Construction Product Data into Building Information Models
(2006)
When considering the integration and interoperability between AEC-FM software applications and construction products' data, it is essential to investigate the state-of-the-art and conduct an extensive review in the literature of both Building Information Models and electronic product catalogues. It was found that there are many reasons and key-barriers that hinder the developed solutions from being implemented. Among the reasons that are attributed to the failure of many previous research projects to achieve this integration aim are the proprietary developments of CAD vendors, the fragmented nature of construction product data i.e. commercial and technical data, the prefabrication versus on-site production, marketing strategies and brand-naming, the referencing of a product to the data of its constituents, availability of life-cycle data in a single point in time where it is needed all over the whole life-cycle of the product itself, taxonomy problems, the inability to extract search parameters from the building information model to participate in the conduction of parametric searches. Finally and most important is keeping the product data in the building information model consistent and up-to-date. Hence, it was found that there is a great potential for construction product data to be integrated to building information models by electronic means in a dynamic and extensible manner that prevents the model from getting obsolete. The study has managed to establish a solution concept that links continually updated and extensible life-cycle product data to a software independent building information model (IFC) all over the life span of the product itself. As a result, the solution concept has managed to reach a reliable building information model that is capable of overcoming the majority of the above mentioned barriers. In the meantime, the solution is capable of referencing, retrieving, updating, and merging product data at any point in time. A distributed network application that represents all the involved parties in the construction product value chain is simulated by real software tools to demonstrate the proof of concept of this research work.
The purpose of this research is to develop the method to retrieve a building name from the impression of the building. First, the images of the building are registered as database by the questionnaire. Next, the images of the objective building are compared with the degree of matching in image databases, and the building with high synthetic matching degree is retrieved. This system could get a good retrieval result. Moreover, image processing was done, and image databases are trained by neural network from the amount of characteristics of the image, and the retrieval system by image processing was examined.
The research of the best building design requires a concerted design approach of both structure and foundation. Our work is an application of this approach. Our objective is also to create an interactive tool, which will be able to define, at the early design stages, the orientations of structure and foundation systems that satisfy as well as possible the client and the architect. If the concerns of these two actors are primarily technical and economical, they also wish to apprehend the environmental and social dimensions of their projects. Thus, this approach bases on alternative studies and on a multi-criterion analysis. In this paper, we present the context of our work, the problem formulation, which allows a concerted design of Structure and Foundation systems and the feasible solutions identifying process.
The synchronous distributed processing of common source code in the software development process is supported by well proven methods. The planning process has similarities with the software development process. However, there are no consistent and similarly successful methods for applications in construction projects. A new approach is proposed in this contribution.
Methods with the convergence order p 2 (Newton`s, tangent hyperbolas, tangent parabolas etc.) and their approximate variants are studied. Conditions are presented under which the approximate variants preserve their convergence rate intrinsic to these methods and some computational aspects (possibilities to organize parallel computation, globalization of a method, the solution of the linear equations versus the matrix inversion at every iteration etc.) are discussed. Polyalgorithmic computational schemes (hybrid methods) combining the best features of various methods are developed and possibilities of their application to numerical solution of two-point boundary-value problem in ordinary differential equations and decomposition-coordination problem in convex programming are analyzed.
The evolution of data exchange and integration standards within the Architectural, Engineering and Construction industry is gradually making the long-held vision of computer-integratedconstruction a reality. The Industry Foundations Classes and CIMSteel Integration Standards are two such standards that have seen remarkable successes over the past few years. Despite successes, these standards support the exchange of product data more than they do process data, especially those processes that are loosely coupled with product models. This paper reports on on-going research to evaluate the adequacy of the IFC and CIS/2 standards to support process modeling in the steel supply chain. Some initial recommendations are made regarding enhancements to the data standards to better support processes.
The primary objective of initial shape analysis of a cable stayed bridge is to calculate initial installation cable tension forces and to evaluate fabrication camber of main span and pylon providing the final longitudinal profile of the bridge at the end of construction. In addition, the initial cable forces depending on the alternation of the bridge’s shape can be obtained from the analysis, and will be used to provide construction safety during construction. In this research, we conducted numerical experiments for initial shape of Ko-ha bridge, which will be constructed in the near future, using three different typical methods such as continuous beam method, linear truss method, and IIMF (Introducing Initial Member Force) method