Triple Sports Hall in Passau, Germany
In Passau's Haidenhof district, a new sports hall extends to the existing school building. A 196.8-foot-long indoor athletics competition facility with four tracks - the "sprint tunnel" - connects the hall and the existing building.
City of Passau
Statik Breinbauer | Tragwerksingenieure
The real eye-catchers of this project are the roof members, which are castellated beams with longitudinal, sinusoidal openings.
Dlubal customer Statik Breinbauer | Tragwerksingenieure performed the structural analysis of this new building. They utilized RFEM finite element software.
The new hall was designed as a reinforced concrete skeleton structure. The hall roof is of a lightweight construction with a trapezoidal sheeting. The roof beams are IPE cross-sections with openings created in the central webs by curved flame cutting. The two wavy T-sections created were then offset by half the opening width and welded together again. The resulting cellular beam has a higher moment of inertia while utilizing the same amount of steel.
The running track on the upper floor also has a lightweight roof with transversal steel sections and a trapezoidal sheeting. The special feature of this bridge-like, 3D truss is the arrangement of the I-beams. They are arranged at 90° rotations and selected from either an HEAA, HEA, or HEB beam of the same width.
Therefore, all connection points were welded directly to the flanges without additional gusset plates while maintaining optimized design utilization. The floor structure includes HOLORIB composite concrete slabs, which increased the mass for vibration reduction and prevented the need for any temporary supports during assembly.
Project LocationNeuburgerstrasse 96c
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In RF-/STEEL EC3, sets of members are calculated according to the General Method (EN 1993-1-1, Cl. 6.3.4) together with the stability analysis. To do this, it is necessary to determine the correct support conditions for the equivalent structure with four degrees of freedom.
SHAPE-THIN determines the effective cross-sections according to EN 1993-1-3 and EN 1993-1-5 for cold-formed sections. You can optionally check the geometric conditions for the applicability of the standard specified in EN 1993‑1‑3, Section 5.2.
The effects of local plate buckling are considered according to the method of reduced widths and the possible buckling of stiffeners (instability) is considered for stiffened sections according to EN 1993-1-3, Section 5.5.
As an option, you can perform an iterative calculation to optimize the effective cross-section.
You can display the effective cross-sections graphically.
Read more about designing cold-formed sections with SHAPE-THIN and RF-/STEEL Cold-Formed Sections in this technical article: Design of a Thin-Walled, Cold-Formed C-Section According to EN 1993-1-3.
- I design a set of members by using the equivalent member method in RF‑/STEEL EC3, but the calculation fails. The system is unstable, delivering the message "Non-designable - ER055) Zero value of the critical moment on the segment."What could be the reason?
- Why are some load cases displayed in red in RF‑STEEL EC3?
- Why are the equivalent member designs grayed out in the Stability tab when activating the plastic designs by using the partial internal force method (RF‑/STEEL Plasticity)?
- I would like to perform a stability analysis of the upper flange in a long truss. What is the best way to proceed?
- Which cross-sections can I design with the "RF‑/STEEL Cold-Formed Sections" add-on module?
- What is the difference between the RF‑/STEEL and RF‑/STEEL EC3 add-on modules?
- I perform a stability analysis of a beam for lateral-torsional buckling. Why is the modified reduction factor χLT,mod used in the design according to DIN EN 1993‑1‑1, 6.3.3 Method 2? Is it possible to deactivate this?
- I need to define different types of lateral intermediate restrains for a single element in RF-/STEEL EC3. Is this possible?
- I compare the flexural buckling design according to the equivalent member method and the internal forces according to the linear static analysis with the stress calculation according to the second-order analysis including imperfections. The differences are very large. What is the reason?
- Is it possible to design member groups using the EC3 add-on module?
Programs Used for Structural Analysis
Structural engineering software for finite element analysis (FEA) of planar and spatial structural systems consisting of plates, walls, shells, members (beams), solids and contact elements
Design of steel members according to Eurocode 3