Renovation of the Flour Factory 'de Sleutels' in Leiden

Renovation of the Flour Factory 'de Sleutels' in Leiden

Van Loenhout, M.C.

Nijsse, R. (mentor)
Zijlstra, H. (mentor)
Pasterkamp, S. (mentor)
Van der Sluis, A. (mentor)

Civil Engineering and Geosciences

Structural Engineering

2012-06-19

Currently there are a lot of vacant buildings available. To reuse these buildings, which may or may not have monumental status, the project has to be financially feasible. If a building has good potentials to be reused, the capacity of the structure and the possibilities of adapting the structures needs to be examined to make a project possible This study focuses on how the structural design influence the redesigning for reuse of a monument. As a design case the Flour factory in Leiden has been selected. The old flour factory ‘de Sleutels’, located at the corner of the Oosterkerkstraat and the canal the Zijlsingel in Leiden is a complex of nine different buildings with each different characteristics. The architect Peter Zumthor designed a plan on how to reuse the existing buildings and which interventions should be done to realize this. The problem definition is the following: How can the interventions, as proposed by Peter Zumthor and partner, be integrated in the current structures of the former flour factory ‘meelfabriek de Sleutels’ in Leiden, so that sound safe structures, set out in the Dutch Building Regulations and in the Eurocode-regulations, are created and which adjustments and additions should be made to realize this goal? The methodology generated is applied on this project. First as much as possible data was searched for. This data was, when possible, compared to inspections on the buildings on site to get a realistic overview of the characteristics of the building. Where data was missing assumptions were made (in reality it is recommended to find the missing data by inspections on site) or conclusions were drawn from visible inspections. With this overview it was possible to detect the failures and possibilities of the structures of the buildings. The failures and possibilities resulted in different solutions to realize the proposed architectural interventions in the existing structures. A selection of the best solution was done by testing them on the set preconditions (as set in the architectural analysis, in reality this is done by client, architect, state or municipality and other stakeholders involved). The solution that fits best is selected to develop the final structural design. To adapt the Boiler House to an workshop building the foundation capacity has to be examined further and the possibility to couple the building in South direction to the cleaning building to provide stability. If it is possible the steel should be examined on its yielding strength and a check has to be done if the masonry is still intact and if the bond between steel skeleton and concrete floors still is present, otherwise anchors could be used to solve this problem. To adapt the silos built in 1904 to a hotel the foundation should be reinforced, because it has now only a rest-life of 25 years. The cracks in the roof should be repaired to prevent (further) carbonation and corroding of the steel. To adapt the Mill to an atelier building, sloping columns are added to transfer the overloading forces to the outer dies, with extra capacity, to make the foundation safe. Braces are added in the outer portals and two inner portals to take care of the displacement. The structure should be cleaned from corrosion and protected; a sprinkler installation should diminish the temperature of the structure to provide fire safety. To adapt the Flour Warehouse to a fitness building a steel top is realised with steel-plate concrete floors to make a light structure, to create a safe foundation. Outriggers are placed in the top to take care of the displacement. Where reinforcement is visible the concrete should be repaired to prevent (further) carbonation and corroding of the steel. To adapt the silos built in ’37, ’38 and ’55 to a hotel the concrete has to be repaired where reinforcement is visible to prevent (further) carbonation and corroding of the steel. To adapt the cleaning building to a design office the foundation capacity has to be examined further and the concrete has to be repaired where reinforcement is visible to prevent (further) carbonation and corroding of the steel. To adapt the extension of the Mill to apartments the structure should be cleaned from corrosion and protected. The displacement should be diminished by adding braces or a core. To adapt the Tower of Silos into design and fashion shops the concrete has to be repaired where reinforcement is visible to prevent (further) carbonation and corroding of the steel. The final conclusion: The interventions and additions of the structures of The Mill and the Flour Warehouse are sound safe structures verified according to the Dutch Building Regulations and the Eurocode-regulations. The capacity of the existing structures is used at full extend and simple solutions make additions or adaptions possible. The monumental values are kept intact and the preconditions as set according to the vision of the architect and the client wishes are nearly achieved. Recommendations When an existing structure is adapted to the needs of a renovation project the following recommendations can be done: • Use the methodology as generated in this thesis, based on the ABCD method. When data is thoroughly searched and compared with measurements from inspections on the structures it is possible to find failures and possibilities, which give a good base for the redesign. • When there is a need for adapting the structure search for the extra capacity of a structure and make a solution with this capacity. • From this thesis it appears that buildings build until at least 1947 were not designed on stability and or horizontal displacement, consider this when making a redesign for a structure of the same period.

renovation
structural design
buildings 1900-1960
factory

http://resolver.tudelft.nl/uuid:f8152687-a61d-4773-8304-9369eb07e18f

Student theses

master thesis

(c) 2012 Van Loenhout, M.C.