Papers by Viktoria Henriksson
Curved and Layered Structures, 2021
At the time of completion in 1961, the roof of St. Charles Church became the largest unbalanced h... more At the time of completion in 1961, the roof of St. Charles Church became the largest unbalanced hyperbolic paraboloid structure in the United States and the only shell structure in Spokane, WA. Situated on an 8-acre site on the north side of the city, St. Charles is a modernist structure designed through partnership of Funk, Molander & Johnson engineers, architect William C. James and in consultation with Professor T.Y. Lin of the Structural Engineering Laboratory at the University of California, Berkeley. This asymmetric structure spans over 33.5 m (110 ft) and utilizes folded edge beams that taper from 1067 mm (42 in) at the base to a 76.2 mm (3 in) thickness at the topmost edge using regular strength reinforcing steel and concrete load carrying components. The novelty of the pre-stressed shell structure serves both architectural and structural design criteria by delivering a large, uninterrupted interior sanctuary space in materially and economically efficient manner. This structural assessment summarizes the roof's historic design and construction according to the original construction documents, newspaper reports and historic photographs. The FEA is completed using UBC 1955 design loads and ACI 334 Concrete Shell Structures provisions.
Ontario Celebration Zone pavilion: a large pneumatic structure
Abstract The project is an assembly of two Polyester/PVC-pneumatic structures located at the east... more Abstract The project is an assembly of two Polyester/PVC-pneumatic structures located at the east coast of Lake Ontario in Toronto/Canada. High wind loads due to the exposed location were expected. The larger of the two structures is 15m high and 60m long. The pneumatic nature of the design was key for winning the public competition, because it allowed erection of a spatial enclosure of this size only within the given timeframe of one week prior to the beginning of the Pan American Games. The build-up of the pneumatic system in an alteration of 1.4m diameter (in average) arch shaped tubes and patches of repetitive pneumatic cushions. A form finding exercise for gravity loads (catenary shape) and wind loads (pneumatic form finding) was combined to optimize the structure's performance towards wind and gravity loads. Physical tube tests were performed by the manufacturer (Tectoniks) and compared by TT with pneumatic EASY TM models. Following that, calculations were performed to normalize the stiffness of FEM-Elements in SOFISTIK TM with the measured tubes and afterwards globally analyze the geometry to determine deflections (important for the operation of the pavilion), stresses and global reactions. ∼60 ground screws were used to anchor both structures to the ground.
Curved and Layered Structures, 2021
At the time of completion in 1961, the roof of St. Charles Church became the largest unbalanced h... more At the time of completion in 1961, the roof of St. Charles Church became the largest unbalanced hyperbolic paraboloid structure in the United States and the only shell structure in Spokane, WA. Situated on an 8-acre site on the north side of the city, St. Charles is a modernist structure designed through partnership of Funk, Molander & Johnson engineers, architect William C. James and in consultation with Professor T.Y. Lin of the Structural Engineering Laboratory at the University of California, Berkeley. This asymmetric structure spans over 33.5 m (110 ft) and utilizes folded edge beams that taper from 1067 mm (42 in) at the base to a 76.2 mm (3 in) thickness at the topmost edge using regular strength reinforcing steel and concrete load carrying components. The novelty of the pre-stressed shell structure serves both architectural and structural design criteria by delivering a large, uninterrupted interior sanctuary space in materially and economically efficient manner. This struct...
With the help of modern computer aided tools, complex architectural shapes are becoming increasin... more With the help of modern computer aided tools, complex architectural shapes are becoming increasingly popular and easy to model and design. As a consequence,questions are raised of how to realize and produce the design in a feasible and affordable way. This issue, in the building industry, is known as rationalization. Today, this process normally takes place at the end of the design process, while if it is considered at an early stage, the greatest gains can be made. In this study, rationalization in terms of different surface discretization methods has been a main focus. Historical and modern buildings combined with geometrical theory of how to divide a surface into smaller elements have been studied in order to understand what important factors exist. Site visits and interviews with practicing architects and engineers have been conducted in order to study different design approaches and rationalization of real projects. This study also explores multi-objective optimization, since m...
Procedia Engineering, 2016
The project is an assembly of two Polyester/PVC-pneumatic structures located at the east coast of... more The project is an assembly of two Polyester/PVC-pneumatic structures located at the east coast of Lake Ontario in Toronto/Canada. High wind loads due to the exposed location were expected. The larger of the two structures is 15m high and 60m long. The pneumatic nature of the design was key for winning the public competition, because it allowed erection of a spatial enclosure of this size only within the given timeframe of one week prior to the beginning of the Pan American Games. The build-up of the pneumatic system in an alteration of 1.4m diameter (in average) arch shaped tubes and patches of repetitive pneumatic cushions. A form finding exercise for gravity loads (catenary shape) and wind loads (pneumatic form finding) was combined to optimize the structure's performance towards wind and gravity loads. Physical tube tests were performed by the manufacturer (Tectoniks) and compared by TT with pneumatic EASY TM models. Following that, calculations were performed to normalize the stiffness of FEM-Elements in SOFISTIK TM with the measured tubes and afterwards globally analyze the geometry to determine deflections (important for the operation of the pavilion), stresses and global reactions. ~60 ground screws were used to anchor both structures to the ground.
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Papers by Viktoria Henriksson