Wolfgang Huhnt

Technische Universität Berlin | TUB · Chair of Computing in Civil Engineering

Modeling indoor and outdoor spaces is an important base in different application fields. In state-of-the-art modeling software products, spaces are often modeled as virtual solids. Nevertheless, these software tools suffer from unreliable identification algorithms for these virtual solids. This paper highlights different application fields and expl...

The need for data is indisputable in all fields of architecture and engineering. It is also state-of-the-art to differentiate kinds of data, e.g. geometric data and semantics. Modern engineering workflows are characterized by their high interoperability between different fields of application. Almost all architecture and civil engineering tasks hav...

This paper introduces polyhedral space partition as a representation of geometric objects in digital building models. Operators to modify such a partition model are presented and strategies to guaranty robustness are explained. The topology of a polyhedral space partition can be stored explicitly by pointers in a digital environment. However, coord...

This paper proposes polyhedral space partitioning as an alternative to component assembly of digital models of objects with complex linear shapes. A partition is specified with a path-connected user model, where each object is bounded by n-manifolds. Faces and cells can be non-convex, multiply-connected and unbounded. The user interacts with the us...

Models, where the geometry of objects is specified by their boundaries (boundary representation), are state of the art in architecture and civil engineering. Nevertheless, an alternative approach is space partition. It covers a description of all solids and the empty space. Advantages of using space partition are obvious: neighboring relations are...

Traditionally, the geometry of building components or rooms is either described by their boundary or it is defined by constructive solid models. Modeling tools are available which are based on the principle of constructing building components and of composing a building by adding building components step by step. However, topological relations are...

Die Nutzung digitaler Modelle in Projekten des Bauwesens ist mit dem Begriff Building Information Modeling (BIM) eng verbunden. Im selben Zusammenhang werden häufig die Industry Foundation Classes (IFC) genannt. Softwarehäuser implementieren gegen diesen Standard und erlauben die Nutzung von Daten über die Grenze eines Softwareproduktes hinaus. In...

Computing in Civil Engineering is an active field of research and teaching, focusing on the development and dissemination of information and communication technologies. For example, complex numerical analyses can be conducted in near real time using new computational methods and concepts. Modeling buildings, processes and machines can be significan...

Die Bauinformatik ist sehr eng mit der Entwicklung und Verbreitung von Informations- und Kommunikationstechnologien verbunden. Komplexe numerische Analysen lassen sich quasi in Echtzeit unter Verwendung von neuartigen Computersystemen und Methoden durchführen. Auch die Modellierung von Gebäuden, Prozessen und Maschinen wird durch innovative Ansätze...

Unter dem Begriff „Building Information Modeling (BIM)“ wird derzeit im Bauwesen ein Weg zur Digitalisierung der Prozesse beschritten. Informationen werden zwischen den Beteiligten nicht mehr in der Form einer technischen Zeichnung ausgetauscht. Die Kommunikation erfolgt auf der Grundlage von digitalen Modellen, die erarbeitet, ausgewertet, verände...

Computing in Civil Engineering is an active field of research and teaching, focusing on the development and dissemination of information and communication technologies. For example, complex numerical analyses can be conducted in near real time using new computational methods and concepts. Modeling buildings, processes and machines can be significan...

The processes of building information modeling (BIM) focus on a digital model a representation of geometry and semantics. Any further use depends on the correctness and completeness of the elements of that model. Model validation attempts to check both aspects. As shown by Kraft and Huhnt (2013), semantics of building components depend on geometric...

Computationally aided construction management tasks require the integration of information provided by numerous domain disciplines. The required information is authored in software products specifically tailored to the needs of each domain and may not be available in the desired structure. A uniform data handling concept is sought in order to integ...

An aim of processes of building information modeling is collecting information by the object context, synchronizing information and delegating information to subsequent information derivation processes. Complex derivations depend on semantic information given by objects of a model instance. Semantic information can be part of a semantic concept of...

Animation of construction processes is a useful tool to understand the complexity of civil engineering projects. The basic idea of existing four-dimensional (4D) animation approaches is to establish a link between a construction task and the component where the task is executed. Tasks are defined in scheduling tools; components are defined in CAD t...

Civil engineering processes are characterized by the specific peculiarity that they need to be designed individually for each project. A modelling technique has been developed at TU Berlin that is suitable to support the design of these processes. In this approach, the process is regarded as a result of a computation which requires specific user in...

Designing structures involves the fulfillment of topological properties. Based on these requirements a new technique is outlined which enables the direct modeling of the desired topology rather than wrapping the topological properties into a geometric model. This topological model will then be utilized in building up a consistent geometric model. T...

This article describes the use of process-modelling techniques in civil engineering. Process modelling is regarded as a key competence in different economic sectors. Civil and structural engineers execute complex processes. This article explains why existing modelling techniques are not suitable for the specific class of processes in civil and stru...

Within the project preparation phase, experienced professionals manually map design information onto process information with the aim to develop realistic and practical schedules. Unfortunately, the map-ping itself is neither part of any underlying data model nor is it supported by current scheduling tools. As a consequence the process of setting u...

This paper presents an approach to handle different types of subsequent modifications in construction processes. It is focused on a formalized approach with the objective that effects of subsequent modifications are detected automatically. The approach presented in this paper makes use of an existing modeling technique specifically focused on const...

VorbemerkungDAVOS-Modellierkonzept ModellbildungModellieren von MengenModellieren von Typen und Klassen ObjekttypObjektklasseModellieren von RelationenModellieren der KonsistenzVerwalten von ÄnderungenEditierbare Visualisierung Geometrische FunktionalitätObjektmodellPhysikalische FunktionalitätAlgorithmenBenutzungsoberflächeGeneralisiertes Finite-E...

Construction processes require preparation phases where rules, agreements and arrangements for the execution of the project are discussed and determined. Detailed information is worked out where among others the construction activities are named and follow up charts are determined. In practice, follow up charts are developed that describe the proje...

This paper is focused on the consideration that construction processes can be executed in a better way if specific interfaces are avoided. The interfaces regarded in this paper result form the decomposition of construction activities into subsets. This decomposition is influenced by traditional outlines of professions. As a consequence of this deco...

Projects in structural and civil engineering are individual, and high quality engineering solutions have to be developed in projects where time frames and budgets are more and more important. It is well known in practice and it can be shown in theory that each project requires an individual project planning. Tasks have to be subdivided into subtask...

Die fachlichen Grundlagen der Aufgaben, die in einem Bauunternehmen zu bearbeiten sind, wurden in verschiedenen Disziplinen entwickelt. Maßgeblich waren der Baubetrieb und die Betriebswirtschaftslehre. Die parallele Entwicklung hat jedoch dazu geführt, dass grundlegende Begriff und Verfahren zwischen den Disziplinen nicht aufeinander abgestimmt sin...

Im vorliegenden Beitrag wird ein Integrationskonzept vorgestellt, bei dem das fachspezifische Wissen des Anwenders integraler Bestandteil des Konzeptes ist. Grundgedanke des Konzeptes ist es, die Informationen vorerst im Kontext der Anwendung, mit der sie erstellt wurden, zu belassen. Die Interpretation der Informationen erfolgt durch den Anwender,...

Usually, the co-ordination of design and planning tasks of a project in the construction industries is done in a paper based way. Subsequent modifications have to be handled manually. The effects of modifications cannot be determined automatically. The approach to specify a complete process model before project start does not consider the requireme...

Summary This paper presents a specific modeling technique that is focused on preparing planning processes in civil engineering. Planning processes in civil engineering are characterized by some peculiarities so that the sequence of planning tasks needs to be determined for each planning project. Neither the use of optimized partial processes nor th...

This paper is concerned with information models which support both, technical and economical tasks in construction companies. Today it is state of the art to use software tools in construction companies. However, the information models of these tools are not coordinated. This is specifically true for the medium and small construction companies in G...

Construction data is a useful source of information for construction project management. The sources of data for various aspects of construction management is, in addition to the current project information and the engineer's professional experience, also historical data from previous projects. An example of the use of historical cost data is in th...

This paper presents an approach to handle different types of subsequent modifications in civil engineering planning and construction processes. It is focused on a formalized approach with the objective that effects of subsequent modifications are detected automatically. The approach presented in this paper makes use of an existing modeling techniqu...

Follow up charts require a list of activities, inter-dependencies between activities, and the duration of each activity as its input. This is also true to construction processes where follow up charts for complex projects can cover thousands of construction activities. The management of such a huge list requires a structure. For this purpose, proje...

Kurzfassung: Zur Vorbereitung der Planungsphase werden Angaben über die Pla-nungsphase in einem Prozessmodellkern spezifiziert. Ein vollständiges Prozessmodell wird berechnet. Die abgeleiteten Aussagen dienen zur Strukturierung der Planungspha-se. Während der Planung werden Daten in einem Bauwerksmodell erzeugt, gelesen und geändert. Die Spezifikat...