@inproceedings{HaefnerEckardtKoenke2003,
  author    = {H{\"a}fner, Stefan and Eckardt, Stefan and K{\"o}nke, Carsten},
  title     = {A geometrical inclusion-matrix model for the finite element analysis of concrete at multiple scales},
  doi       = {10.25643/bauhaus-universitaet.301},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-3018},
  year      = {2003},
  abstract  = {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.},
  subject      = {Beton},
  language  = {en}
}
@inproceedings{RickeltReese2004,
  author    = {Rickelt, Christian and Reese, Stefanie},
  title     = {A model adaptive and model reduction strategy combining system-theoretical methods and substructuring},
  doi       = {10.25643/bauhaus-universitaet.151},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1516},
  year      = {2004},
  abstract  = {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.},
  subject      = {Adaptives System},
  language  = {en}
}
@inproceedings{Montag1997,
  author    = {Montag, U.},
  title     = {A New Efficient Concept for Elasto-plastic Simulations of Shell Responses},
  doi       = {10.25643/bauhaus-universitaet.436},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-4364},
  year      = {1997},
  abstract  = {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.},
  subject      = {Schale},
  language  = {en}
}
@inproceedings{Oeljeklaus2003,
  author    = {Oeljeklaus, Michael},
  title     = {A Non-Modal Structural-Damage-Location Method and its Application},
  doi       = {10.25643/bauhaus-universitaet.339},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-3397},
  year      = {2003},
  abstract  = {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.},
  subject      = {Bruchmechanik},
  language  = {en}
}
@inproceedings{TahaSherifHegger2004,
  author    = {Taha, M. M. Reda and Sherif, Alaa and Hegger, Josef},
  title     = {A nouvelle approach for predicting the shear cracking angle in RC and PC beams using artificial neural networks},
  doi       = {10.25643/bauhaus-universitaet.107},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1071},
  year      = {2004},
  abstract  = {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. ...},
  subject      = {Neuronales Netz},
  language  = {en}
}
@inproceedings{HalfmannRankGluecketal.2000,
  author    = {Halfmann, Ansgar and Rank, Ernst and Gl{\"u}ck, M. and Breuer, M. and Durst, F.},
  title     = {A partitioned solution approach for the fluid-structure interaction of wind and thin-walled structures},
  doi       = {10.25643/bauhaus-universitaet.585},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-5858},
  year      = {2000},
  abstract  = {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.},
  subject      = {Tragwerk},
  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}
}
@inproceedings{FahrigNachtweyGellert2004,
  author    = {Fahrig, Torsten and Nachtwey, Bj{\"o}rn and Gellert, Sebastian},
  title     = {A Product Model based Approach to Interactive CAE Design Optimization},
  doi       = {10.25643/bauhaus-universitaet.190},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1901},
  year      = {2004},
  abstract  = {We present a software prototype for fluid flow problems in civil engineering, which combines essential features of Computational Steering approaches with efficient methods for model transfer and high performance computing. The main components of the system are described: - The modeler with a focus on the data management of the product model - The pre-processing and the post-processing toolkit - The simulation kernel based on the Lattice Boltzmann method - The required hardware for real-time computing},
  subject      = {Produktmodell},
  language  = {en}
}
@inproceedings{KitagawaTanakaFuruta2004,
  author    = {Kitagawa, Estuji and Tanaka, Shigenori and Furuta, Hitoshi},
  title     = {A research about the automatic construction of Web/3D model house from 2D digital pictures},
  doi       = {10.25643/bauhaus-universitaet.170},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1702},
  year      = {2004},
  abstract  = {In recent years, the survey is performed for repair, such as a bridge and a building built in past, spending great expense. And it is anxious for the survey technique that doesn't need cost and time more. Then, we made an idea of the technique of precise 3D model creation by 2D pictures. However, the technique of performing the improvement in accuracy of convergent photographing and automatic acquisition of corresponding points was not established. Therefore, in this research, we try to obtain a semi-automation of corresponding points acquisition from initial corresponding points and the improvement in accuracy of convergent photographing. Moreover, we applied the research to the used house of Japanese real estate, and the applicable field was selected as the high needs of the residence of 3D model. And we developed the system that everyone could create Web / 3D model house by VRML easily without requiring expensive apparatuses or expertise.},
  subject      = {Architektur},
  language  = {en}
}
@inproceedings{Skrinar1997,
  author    = {Skrinar, Matjaz},
  title     = {A simple FEM Beam Element with an Arbitrary Number of Cracks},
  doi       = {10.25643/bauhaus-universitaet.428},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-4287},
  year      = {1997},
  abstract  = {To fulfil safety requirements the changes in the static and/or dynamic behaviour of the structure must be analysed with great care. These changes are often caused by local reduction of the stiffness of the structure caused by the irregularities in the structure, as for example cracks. In simple structures such analysis can be performed directly, by solving equations of motion, but for more complex structures a different approach, usually numerical, must be applied. The problem of crack implementation into the structure behaviour has been studied by many authors who have usually modelled the crack as a massless rotational spring of suitable stiffness placed at the beam at the location where the crack occurs. Recently, the numerical procedure for the computation of the stiffness matrix for a beam element with a single transverse crack has been replaced with the element stiffness matrix written in fully symbolic form. A detailed comparison of the results obtained by using 200 2D finite elements with those obtained with a single cracked beam element has confirmed the usefulness of such element.},
  subject      = {Finite-Elemente-Methode},
  language  = {en}
}