Stabwerke auf Freiformflächen

Abstract

Bei einigen bekannten Bauwerken der letzten Jahre, beispielsweise bei der DG‐Bank in Berlin (Architekt: Frank Gehry), dem Arts Center in Singapur (Architekt: Vikas Gore), dem Britischen Museum in London (Architekt: Norman Foster) oder kürzlich den Glasdächern über der Zentralachse und dem Servicezentrum der Neuen Messe in Mailand (Architekt: Massimiliano Fuksas), sind Freiformflächen zunehmend für Gebäudehüllen eingesetzt worden. Der folgende Aufsatz befaßt sich mit den geometrischen Aspekten und den mit der praktischen Umsetzung dieser Bauarten verbundenen Problemen. Es werden insbesondere eine Vielzahl verschiedener Knotenkonstruktionen vorgestellt, ohne die Stabstrukturen für Freiformflächen nicht realisierbar wären.

Numerical Modelling of a Novel Joint System for Grid Shells with T Cross-sections

“…The thick trapezoidal end-elements are welded to the beam ends. The joint system is an end-face joint [1], where the axes of the two bolts are parallel with the beam axis, thus they are mainly under axial load.…”

“…The assembly and geometry of this joint is flexible enough to allow it to be adjusted to the applied free-form shell. The joint may easily be adopted to horizontal angles [1] because of the slender cross-sections and the cylindrical nodal element. It can be adopted to vertical angles in a wide range by cutting the end of the T section web.…”

“…New joint systems are being developed which are easy to assemble, and economic. Such joints were collected and summarized by Stephan et al in [1].…”

“…Both have only one bolt parallel to the pipe beam, thus the bending stiffness is low. Such joints are called end-face joints [1], in which the bolts are in tension. Lopez et al [4] analysed a similar joint system called ORTZ.…”

“…These joints are either end-face joints with two bolts one above the other or splice joints with one or two bolts. Splice joints use bolts perpendicular to the shell surface [1], thus bolts are mainly in shear. The analysed joints by Hwang et al connect beams of rectangular cross-section of the same section size.…”