New stadium for the Bundesliga football club SC Freiburg made with screw connections for prefabricated buildings

The new “Europa-Park Stadium” with a capacity of 34,700 spectators was designed by HPP Architects for the German Bundesliga club SC Freiburg. Located north of Freiburg, close to the airport and well connected by public transport, it replaces the 1954 “Schwarzwaldstadion”. As it no longer met the requirements of a modern sports facility, it could only continue to be used with a special permit from the will. DFL. When a feasibility study showed that the renovation and expansion of the old football stadium would take around eleven years and cost just under a new building, the decision to build a new stadium was an easy one.

Photo: Peikko

Earthquakes, spectators and their influence on the statics of buildings

Imagine more than 30,000 spectators jumping up and down to the rhythm of a football match. The supporting structure is subjected to dynamic loads and vibrations in the foundation connections. In addition, the planning team has to take into account the fact that Freiburg is located in a seismic zone 2. The requirements for stiffening due to seismic forces had to be taken into account in the design.

Expertise is required for challenging projects like this one. HPP has extensive experience building sports facilities, as did Krebs + Kiefer, who were responsible for the entire structural design and fire planning. The range of expertise was completed by Knippers Helbig for steel construction and design.

In Germany, in most cases, pillar connections for seismic stresses can be dimensioned for all seismic zones (0 to 3) in buildings of importance category I to III with no more than 6 full floors, including the connections of the prefabricated parts, according to Eurocodes 2 to 7 – if necessary in combination with building authority approvals for fasteners and, if necessary, with additional design measures in accordance with Appendix A of Eurocode 8.

The engineering department included Peikko’s screw connections in all precast concrete columns of this challenging facility. The column connections, consisting of HPKM® column shoes and HPM® anchor bolts, serve as cantilever supports in the assembled state and as a reinforcement for normal forces in the final state.

New stadium for the Bundesliga football club SC Freiburg made with screw connections for prefabricated buildings

The roof structure is a steel truss structure that slopes inward from the outer wall by approximately 44 m.

Photo: Peikko

New stadium for the Bundesliga football club SC Freiburg made with screw connections for prefabricated buildings

The roof trusses are supported by external inclined steel supports, which transfer the tensile forces to the foundations.

Photo: Peikko

New stadium for the Bundesliga football club SC Freiburg made with screw connections for prefabricated buildings

Imagine over 30,000 football fans jumping up and down to the beat. The structure is exposed to dynamic loads and vibrations up to the foundation connections.

Photo: Peikko

New stadium for the Bundesliga football club SC Freiburg made with screw connections for prefabricated buildings

In the support of the roof construction on the precast concrete walls and pillars, galvanized anchor bolts anchor the connections of the steel components in the concrete construction.

Photo: Peikko

New stadium for the Bundesliga football club SC Freiburg made with screw connections for prefabricated buildings

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