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000186
2008-01-02

Kressbronn-Gohren Marina Hotel at Lake Constance, Germany

The marina hotel is situated between Friedrichshafen and Lindau, on Lake Constance, one of the most attractive regions of Germany.

Das mehrstöckige Hotel befindet sich in der Erdbebenzone 2. Mit Hilfe von RFEM konnte die schwierige Geometrie realistisch erfasst und berechnet werden. Durch das Zusatzmodul RF-DYNAM konnte der Erdbebennachweis ohne Probleme geführt werden.

Konstruktion und Bemessung
Die Bemessung des mehrstöckigen Hotels erfolgte komplett in einem räumlichen FEM-Modell in RFEM. Neben den Lastfällen Eigengewicht, Nutzlasten, Schnee und Wind waren auch die Erdbebenersatzlasten zu berücksichtigen.

Das segmentförmige Bauwerk wird durch Stahlbetonrahmen und einen Treppenhauskern ausgesteift. Durch die Form des Gebäudes und durch die Notwendigkeit, die Eigenfrequenzen zu ermittlen, war sehr schnell klar, dass eine räumliche Berechnung Vorteile bieten würde.

Das Hotel hat eine Länge von 40,9 m bei einer Breite von 32 m und einer Höhe von 15,7 m. Das Gesamtgewicht beträgt ca. 2.100 to.

Das Statikmodell besteht aus 626 Knoten, 92 Flächen und 123 Stäben. Das FE‑Netz hat 12.758 Knoten und 12.923 FE-Elemente. Die Rechenzeit für alle Lastfälle (linear) beträgt ca. 30 Sekunden.

„Das mehrstöckige Hotel be findet sich in der Erdbebenzone 2. Mit Hilfe von RFEM konnte die schwierige Geometrie realistisch erfasst und berechnet werden. Durch das Zusatzmodul RF‑DYNAM konnte der Erdbebennachweis ohne Probleme geführt werden. Mit einer herkömmlichen Berechnung hätte diese Struktur nicht realitätsnah berechnet werden können und somit zu wesentlich höheren Baukosten geführt,“ so Anton Rohmer vom gleichnamigen Büro.

Structural Engineering Ingenieurbüro Rohmer GmbH, Laupheim, Germany
www.statik-rohmer.de
Architect Götz Siegmann, Langenargen, Germany
Construction Project Management
Ingenieurbüro Ugo Mordasini, Langenargen, Germany
www.mordasini-baumanagement.de

Contractor
Georg Reisch GmbH & Co. KG, Bad Salgau, Germany
www.reisch-bau.de
Investor Meichle + Mohr GmbH, Kressbronn, Germany
www.meichle-mohr.de

Project Specifications

Do you have any questions?

Videos
Models to Download
Knowledge Base Articles
RFEM Model with Permanent and Variable Loads
This article deals with rectilinear elements of which the cross-section is subjected to axial compressive force. The purpose of this article is to show how very many parameters defined in the Eurocodes for concrete column calculation are considered in the RFEM 5 structural analysis software.
Design of Shear Joint
RF-CONCRETE Members also includes the design of a shear joint. In order to perform this design, you should select the "Shear joint available" check box in Window 1.6, Shear Joint tab.
Adjusting Reinforcement Directly in Graphic Window
It is possible to edit a reinforcement layout or an existing reinforcement directly in the reinforcement's 3D rendering.
Fire Resistance Design with CONCRETE and RF-CONCRETE Members
The reinforced concrete design for fire situations is carried out according to the simplified method based on EN 1992-1-2, Clause 4.2. The "zone method" described in Annex B.2 is used: The cross-section is subdivided into a number of parallel zones of equal thickness, and their temperature-dependent compressive strength is determined. The reduced load-bearing capacity in the event of fire exposure is thus represented by a reduced structural component's cross-section with reduced strengths.
Screenshots
Product Features
Transfer of Reinforcement from RFEM/RSTAB (Top) to Revit (Bottom)

The reinforcement proposal from RF-/CONCRETE Members can be exported to Revit. The rectangular and circular cross-sections are currently supported.

The reinforcement bars can be modified retroactively in Revit.

Transfer of Reinforcement Objects from RFEM to Revit

Surface reinforcements defined in the RF-CONCRETE Surfaces add-on module can be exported to Revit as reinforcement objects via the direct interface. To do this, you can optionally select surface, rectangular, polygon, and circular reinforcement areas in RF-CONCRETE Surfaces. In addition to bar reinforcement, it is possible to export mesh reinforcement.

Feature 002423 | Displaying Results in Solids

The results of solid stresses can be displayed as colored 3D points in the finite elements.

Improved Calculation Performance by Optimized Consideration of Nodal Degrees of Freedom in RFEM

The number of degrees of freedom in a node is no longer a global calculation parameter in RFEM (6 degrees of freedom for each mesh node in 3D models, 7 degrees of freedom for the warping torsion analysis). Thus, each node is generally considered with a different number of degrees of freedom, which leads to a variable number of equations in the calculation.

This modification speeds up the calculation, especially for models where a significant reduction of the system could be achieved (for example, trusses and membrane structures).

Frequently Asked Questions (FAQ)
What is the maximum number of reinforcement groups that can be created in a design case in RF‑CONCRETE Surfaces?
In RF-CONCRETE Surfaces, I get a high amount of reinforcement in connection with a lever arm that is almost zero. How does such a small lever arm of internal forces come about?
When switching from the manual definition of the reinforcement areas to the automatic arrangement of the reinforcement according to window 1.4, the result of the deformation calculation changes, although the basic reinforcement has not been changed. What makes this change?
Why do I get a discontinuous area in the distribution of internal forces? In the area of the supported line, the shear force VEd shows a jump, which does not seem plausible.
Is it possible to perform design without an additional reinforcement in RF‑CONCRETE Surfaces?
I obtain different results when comparing the deformation analysis in the RF‑CONCRETE add-on modules and another calculation program. What could be the reason for this?
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