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The Victoria Tower in Kista, north of Stockholm is a 120m high building with 34 storeys. Special emphasis has to be placed on the structural design calculations when you build both tall and narrow, and to this end the Gothenburg company Integra Engineering has used the advanced structural design programme StruSoft FEM-Design for both the static and dynamic analysis of the project.

"I have worked with StruSoft FEM-Design since 2001 and it is the program we use for all Three-dimemsional structural design" says consultant Martin Rienholdsson. "The program is simple to work with, and the latest version is further improved - among other things it has become much easier to use and calculation times are much faster. Compared with other Finite Element programs, StruSoft's package is very user friendly which is precisely what we need."

With regard to the Victoria Tower, StruSoft FEM-Design was used for all of the structural factors that affect this type of building, including calculating the normal limit states, performing the overall analysis and for studying the various force distributions.

The main requirement for Integra Engineering was to determine the column reactions, loads and beam forces. Among the most important elements in the building were the two stabilising cores, one for the stairs and one for the lifts, where the engineers used StruSoft FEM-Design to do the stress analysis.

"We used StruSoft FEM-Design for nearly everything that relates to our involvement with Victoria Tower", says Anders Klittmar, the project leader. "The building’s frame has an eccentric centre of rotation, which means that it acts in different and complex ways"

"We put all the geometry we had into StruSoft FEM-Design" says Martin Reinholdsson. "By selecting part of the structure, seeing how it behaves, and then extracting what we needed out of the selected part, we iterated calculations to provide the correct dimensions, stresses, forces and geometry."

Anders Klittmar added that one uses this type of program with respect. It requires experience to create an effective model to handle a structure of this complexity.

Has StruSoft FEM-Design met the requirements for such an advanced project as the Victoria Tower? "Absolutely" say Anders Klittmar and Martin Reinholdsson, adding "The program has everything one needs." Both engineers believe that they wouldn’t have had effective control of the design if they didn’t have access to StruSoft FEM-Design. "To have an advanced but never-the-less simple and easy to use programme for 3D modelling is even more important when it comes to such major tall buildings as the Victoria Tower."
Göran Nilsson