@inproceedings{Schroeder1997,
  author    = {Schroeder, P.},
  title     = {Ein stochastisches Modell zur Berechnung von B{\"o}eneinwirkungen auf Br{\"u}ckenbauwerke},
  doi       = {10.25643/bauhaus-universitaet.440},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-4409},
  year      = {1997},
  abstract  = {Zur Berechnung der B{\"o}eneinwirkungen auf ein Br{\"u}ckenbauwerk wird ein stochastisches Modell vorgestellt. Die Windkraft aus der B{\"o}enbelastung wird dabei als systemunabh{\"a}ngige Luftkraft betrachtet welche in mathematischer Hinsicht dadurch gekennzeichnet ist, daß die aeroelastischen Bewegungsdifferentialgleichungen inhomogener Natur sind und der Bewegungsablauf den Charakter einer erzwungenen abklingenden Schwingung hat. Ausgehend von den nicht linearen partiellen Differentialgleichungen f{\"u}r Verschiebung und Torsion wird mittels der Galerkin Prozedur ein System von totalen Differentialgleichungen abgeleitet. Die {\"a}ußeren Luftkr{\"a}fte werden als gefilterter Poissonprozess von Dirac Impulsen dargestellt. Zur Berechnung der statistischen Momente des Differentialgleichungssystem wird die It{\^o}'sche Differentialformel erweitert und in ein System von algebraischen nicht linearen Gleichungen transformiert. Diese dienen zur Berechnung des Momentenverlaufs f{\"u}r den station{\"a}ren Anteil des stochastischen Prozesses. Der Abschluß des so erhaltenen nicht linearen Gleichungssystems erfolgt {\"u}ber die Methode der Kumulantenabschlußtechnik.},
  subject      = {Br{\"u}cke},
  language  = {de}
}
@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}
}
@article{ChowdhuryZabel,
  author    = {Chowdhury, Sharmistha and Zabel, Volkmar},
  title     = {Influence of loading sequence on wind induced fatigue assessment of bolts in TV-tower connection block},
  series = {Results in Engineering},
  volume    = {2022},
  journal   = {Results in Engineering},
  number    = {Volume 16, article 100603},
  publisher = {Elsevier},
  address   = {Amsterdam},
  doi       = {10.1016/j.rineng.2022.100603},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20221028-47303},
  pages     = {1 -- 18},
  abstract  = {Bolted connections are widely employed in structures like transmission poles, wind turbines, and television (TV) towers. The behaviour of bolted connections is often complex and plays a significant role in the overall dynamic characteristics of the structure. The goal of this work is to conduct a fatigue lifecycle assessment of such a bolted connection block of a 193 m tall TV tower, for which 205 days of real measurement data have been obtained from the installed monitoring devices. Based on the recorded data, the best-fit stochastic wind distribution for 50 years, the decisive wind action, and the locations to carry out the fatigue analysis have been decided. A 3D beam model of the entire tower is developed to extract the nodal forces corresponding to the connection block location under various mean wind speeds, which is later coupled with a detailed complex finite element model of the connection block, with over three million degrees of freedom, for acquiring stress histories on some pre-selected bolts. The random stress histories are analysed using the rainflow counting algorithm (RCA) and the damage is estimated using Palmgren-Miner's damage accumulation law. A modification is proposed to integrate the loading sequence effect into the RCA, which otherwise is ignored, and the differences between the two RCAs are investigated in terms of the accumulated damage.},
  subject      = {Schadensakkumulation},
  language  = {en}
}