@article{ZhuangHuangLiangetal.,
  author    = {Zhuang, Xiaoying and Huang, Runqiu and Liang, Chao and Rabczuk, Timon},
  title     = {A coupled thermo-hydro-mechanical model of jointed hard rock for compressed air energy storage},
  series = {Mathematical Problems in Engineering},
  journal   = {Mathematical Problems in Engineering},
  doi       = {10.1155/2014/179169},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170428-31726},
  abstract  = {Renewable energy resources such as wind and solar are intermittent, which causes instability when being connected to utility grid of electricity. Compressed air energy storage (CAES) provides an economic and technical viable solution to this problem by utilizing subsurface rock cavern to store the electricity generated by renewable energy in the form of compressed air. Though CAES has been used for over three decades, it is only restricted to salt rock or aquifers for air tightness reason. In this paper, the technical feasibility of utilizing hard rock for CAES is investigated by using a coupled thermo-hydro-mechanical (THM) modelling of nonisothermal gas flow. Governing equations are derived from the rules of energy balance, mass balance, and static equilibrium. Cyclic volumetric mass source and heat source models are applied to simulate the gas injection and production. Evaluation is carried out for intact rock and rock with discrete crack, respectively. In both cases, the heat and pressure losses using air mass control and supplementary air injection are compared.},
  subject      = {Energiespeicherung},
  language  = {en}
}
@inproceedings{RueppelMeissnerGreb2004,
  author    = {Rueppel, Uwe and Meißner, Udo F. and Greb, Steffen},
  title     = {A Petri Net based Method for Distributed Process Modelling in Structural Engineering},
  doi       = {10.25643/bauhaus-universitaet.133},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1338},
  year      = {2004},
  abstract  = {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.},
  subject      = {Ingenieurbau},
  language  = {en}
}
@article{Rebolj1997,
  author    = {Rebolj, D.},
  title     = {A Product Model of a Road},
  doi       = {10.25643/bauhaus-universitaet.458},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-4584},
  year      = {1997},
  abstract  = {Many errors and delays frequently appear when data is exchanged between particular tasks in the lifecycle of the road. Inter-task connections are therefore of great importance for the quality of the final product. The article describes a product model of a road wich is the kernel of an integrated information system intended to support all important stages of the road lifecycle: design, evaluation (through different analysis procedures), construction, and maintainance. Since particular tasks are often executed at different places and in different companies, the interconnections are supported by a special metafile which contains all specific data of the product model. The concept of the integrated system is object and component oriented. Additionally, existing conventional program packages are included to support some common tasks (methods). A conventional relational database system as well as an open spatial database system with the relevant GIS functionality are included to support the data structures of the model.},
  subject      = {Straße},
  language  = {en}
}
@inproceedings{Olivier2004,
  author    = {Olivier, A. H.},
  title     = {An application-centred framework for distributed engineering applications},
  doi       = {10.25643/bauhaus-universitaet.135},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1353},
  year      = {2004},
  abstract  = {The conceptual structure of an application that can support the structural analysis task in a distributed collaboratory is described in (van Rooyen and Olivier 2004). The application described there has a standalone component for executing the finite element method on a local workstation in the absence of network access. This application is comparable to current, local workstation based finite element packages. However, it differs fundamentally from standard packages since the application itself, and its objects, are adapted to support distributed execution of the analysis task. Basic aspects of an object-oriented framework for the development of applications which can be used in similar distributed collaboratories are described in this paper. An important feature of this framework is its application-centred design. This means that an application can contain any number of engineering models, where the models are formed by the collection of objects according to semantic views within the application. This is achieved through very flexible classes Application and Model, which are described in detail. The advantages of the application-centred design approach is demonstrated with reference to the design of steel structures, where the finite element analysis model, member design model and connection design model interact to provide the required functionality.},
  subject      = {Ingenieurbau},
  language  = {en}
}
@inproceedings{Raue2003,
  author    = {Raue, Erich},
  title     = {Anwendung der mathematischen Optimierung bei der Modellbildung und Analyse des nichtlinearen Tragverhaltens von Stahlbetontragwerken},
  doi       = {10.25643/bauhaus-universitaet.371},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-3717},
  year      = {2003},
  abstract  = {In den zur{\"u}ckliegenden Jahren wurden an der Professur Massivbau I umfangreiche Untersuchungen zur Modellbildung und rechnerischen Erfassung des Tragverhaltens von Tragwerken und Tragwerkselementen aus Stahlbeton und Spannbeton unter Ber{\"u}cksichtigung von Rißbildungen und Plastizierungen durchgef{\"u}hrt. Diesen Untersuchungen liegt als einheitliches methodisches Konzept der mathematischen Problembeschreibung und Probleml{\"o}sung die mathematische Optimierung zugrunde. Bereits anl{\"a}ßlich des IKM 1994 [1] hatte der Verfasser Gelegenheit, zusammenfassend {\"u}ber Ergebnisse bei der Anwendung der mathematischen Optimierung im Bereich der nichtlinearen Tragwerksanalyse zu berichten. Der vorliegende Beitrag, soll einen {\"U}berblick {\"u}ber seitdem untersuchte Problemkreise und dabei gewonnene Ergebnisse und Erfahrungen vermitteln. Bei der Anwendung der linearen und quadratischen Optimierung sind wegen der geforderten Linearit{\"a}t der Nebenbedingungen Vereinfachungen bei der Modellbildung des stahlbetonspezifischen Tragverhaltens unumg{\"a}nglich. Besonders betroffen sind die Ans{\"a}tze zur Beschreibungen des Materialverhaltens. Durch den Einsatz allgemeiner nichtlinearer mathematischer Optimierungsmethoden l{\"a}sst sich eine methodisch bedingte Linearisierung des Berechnungsmodells umgehen....},
  subject      = {Tragwerk},
  language  = {de}
}
@inproceedings{RaueTimmlerSchueler1997,
  author    = {Raue, Erich and Timmler, Hans-Georg and Sch{\"u}ler, H.},
  title     = {Anwendung der mathematischen Optimierung bei der physikalisch und geometrisch nichtlinearen Analyse und Bemessung seismisch beanspruchter Tragwerke},
  doi       = {10.25643/bauhaus-universitaet.442},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-4421},
  year      = {1997},
  abstract  = {Moderne Bemessungskonzepte f{\"u}r seismisch beanspruchte Hochbauten, wie die Methode der Kapazit{\"a}ts-bemessung, planen inelastisches Verhalten einzelner Bereiche der Konstruktion beim Entwurf bewußt ein, um so einen Teil der durch das Beben eingetragenen Energie als inelastische Form{\"a}nderungsarbeit zu absorbieren. Wird bei Akzeptanz inelastischen Verhaltens eine bestimmte Belastungsintensit{\"a}t, die als adaptive Grenzlast oder Einspiellast bezeichnet wird, {\"u}berschritten, kann es infolge zyklischer Einwirkungen zu einer unbe-grenzten Akkumulation inelastischer Deformationen kommen. Die adaptive Grenzlast stellt damit f{\"u}r zyklische Einwirkungen eine geeignete Kenngr{\"o}ße zur Bewertung der Tragwerksqualit{\"a}t dar, bei der neben der Sicherung des Gleichgewichts ein bestimmtes Sch{\"a}digungsniveau nicht {\"u}berschritten wird. Im vorliegenden Beitrag werden die Grundz{\"u}ge eines Bemessungs- und Nachweiskonzeptes f{\"u}r seismisch beanspruchte Stahlbetontragwerke, das unter Einbeziehung der Grundprinzipe der Kapazit{\"a}tsbemessung von einem einheitlichen Kriterium zur Beschreibung des Grenzzustandes der Tragf{\"a}higkeit auf der Basis der adaptive Grenzlast ausgeht, vorgestellt. Dabei ist die Absch{\"a}tzung der Verformungen notwendiger Bestandteil des Nachweis- bzw. Bemessungskonzeptes. Bei Druckgliedern ist die Ber{\"u}cksichtigung des Einflusses der Verformungen notwendiger Bestandteil des Bemessungskonzeptes. Entsprechende Erweiterungen der Berechnungsmodelle zur Ber{\"u}cksichtigung des Einflusses geometrisch nichtlinearer Effekte im Sinne einer Theorie II. Ordnung werden vorgestellt.},
  subject      = {Bauwerk},
  language  = {de}
}
@phdthesis{Semar2010,
  author    = {Semar, Olivier},
  title     = {Anwendung der Perkolationstheorie zur Analyse des suffosiven Partikeltransportes},
  doi       = {10.25643/bauhaus-universitaet.1438},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20101124-15252},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  year      = {2010},
  abstract  = {Die vorliegende Arbeit besch{\"a}ftigt sich mit der geometrischen Suffosionsbest{\"a}ndigkeit von Erdstoffen. Mit dem wahrscheinlichkeitstheoretischen Ansatz der Perkolationstheorie wurde ein analytisches Verfahren gew{\"a}hlt, mit dem suffosive Materialtransportprozesse modelliert und quantifiziert werden k{\"o}nnen. Mit dem verwendeten Perkolationsmodell wurde eine beliebige Porenstruktur eines realen Erdstoffes im 3-Dimensionalen modelliert. M{\"o}gliche Materialtransportprozesse innerhalb der modellierten Porenstruktur wurden anschließend simuliert. Allgemein g{\"u}ltige Gesetzm{\"a}ßigkeiten wurden hergeleitet und Grenzbedingungen formuliert. Diese sind vom Erdstoff unabh{\"a}ngig und beschreiben Zusammenh{\"a}nge zwischen Materialtransport und Porenstruktur. Anwendbar sind diese Ergebnisse auf homogene, isotrope und selbst{\"a}hnliche Erdstoffgef{\"u}ge. Aussagen {\"u}ber konkrete Erdstoffe k{\"o}nnen {\"u}ber die Transformationsmethode erfolgen. F{\"u}r die Verwendung der Transformationsmethode ist vorab die relevante Porenstruktur, d. h. die Porenengstellenverteilung, zu ermitteln.},
  subject      = {Perkolationstheorie},
  language  = {de}
}
@inproceedings{MostBucher2003,
  author    = {Most, Thomas and Bucher, Christian},
  title     = {Application of the "fictious crack model" to meshless crack growth simulations},
  doi       = {10.25643/bauhaus-universitaet.335},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-3359},
  year      = {2003},
  abstract  = {In this paper a meshless component is presented, which internally uses the common meshless interpolation technique >Moving Least Squares<. In contrast to usual meshless integration schemes like the cell quadrature and the nodal integration in this study integration zones with triangular geometry spanned by three nodes are used for 2D analysis. The boundary of the structure is defined by boundary nodes, which are similar to finite element nodes. By using the neighborhood relations of the integration zones an efficient search algorithm to detected the nodes in the influence of the integration points was developed. The components are directly coupled with finite elements by using a penalty method. An widely accepted model to describe the fracture behavior of concrete is the >Fictitious Crack Model< which is applied in this study, which differentiates between micro cracks and macro cracks, with and without force transmission over the crack surface, respectively. In this study the crack surface is discretized by node pairs in form of a polygon, which is part of the boundary. To apply the >Fictitious Crack Model< finite interface elements are included between the crack surface nodes. The determination of the maximum principal strain at the crack tip is done by introducing an influence area around the singularity. On a practical example it is shown that the included elements improve the model by the transmission of the surface forces during monotonic loading and by the representation of the contact forces of closed cracks during reverse loading.},
  subject      = {Bruchmechanik},
  language  = {en}
}
@inproceedings{Hartmann2004,
  author    = {Hartmann, Ulrich C.},
  title     = {Collaboration in AEC Design : Web-enabling Applications using Peer-to-Peer Office Communicator},
  doi       = {10.25643/bauhaus-universitaet.138},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1386},
  year      = {2004},
  abstract  = {A market analysis conducted by Gartner Dataquest in August 2001 has shown the typical characteristics of the AEC design process. High volatility in membership of AEC design groups and members dispersed over several external offices is the common collaboration scenario. Membership is most times short lived, compared to the overall duration of the process. A technical solution has to take that into account by making joining and leaving a collaborative work group very easy. The modelling of roles of collaboration between group members must be based on a commonly understood principle like the publisher / subscriber model, where the individual that is responsible for the distribution of vital information is clear. Security issues and trust in the confidentiality of the system is a central concern for the acceptance of the system. Therefore, keeping the subset of data that will be published under the absolute control of the publisher is a must. This is not the case with server-based scenarios, sometimes even due to psychological reasons. A loosely bound Peer-to-Peer network offers advantages over a server-based solution, because of less administrative overhead and simple installation procedures. In a peer-to-peer environment, a publish/subscribe role model can be more easily implemented. The publish/subscribe model matches the way AEC processes are modelled in real world scenarios today, where legal proof of information exchange between external offices is of high importance. Workflow management systems for small to midsize companies of the AEC industry may adopt the peer-to-peer approach to collaboration in the future. Further investigations are being made on the research level (WINDS) by integrating the viewer and redlining application Collaborate! into a collaborative environment.},
  subject      = {Ingenieurbau},
  language  = {en}
}
@inproceedings{MilesJoitaBurnap2004,
  author    = {Miles, John and Joita, Liviu and Burnap, Peter},
  title     = {Collaborative Engineering: Virtual Teams in a Grid Environment Supporting Consortia in the Construction Industry},
  doi       = {10.25643/bauhaus-universitaet.136},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1362},
  year      = {2004},
  abstract  = {In the AEC (Architecture / Engineering / Construction) industry a number of individuals and organisations collaborate and work jointly on a construction project. The resulting consortium has large pool of expertise and experience and can be defined as a Virtual Organisation (VO) formed for the duration of the project. VOs are electronically networked organisations where IT and web based communication technology play an important role in coordinating various activities of these organisations. This paper describes the design, development and implementation of a Grid enabled application called the Product Supplier Catalogue Database (PSCD) which supports collaborative working in consortia. As part of the Grid-enabling process, specialised metadata is being developed to enable PSCD to effectively utilise Grid middleware such as Globus and Java CoG toolkits. We also describe our experience whilst designing, developing and deploying the security service of the application using the Globus Security Interface (GSI).},
  subject      = {Ingenieurbau},
  language  = {en}
}