
Connection Detailing and Erection of Prestressed Stayed Masts: Structural Integration and Construction Methodology
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Prestressed stayed masts are slender compression members stabilized through tensioned cables or rods connected via transverse cross-arms. Their structural performance is closely tied to the design and execution of connection details and erection procedures. This paper focuses on the detailing and erecting stayed masts, highlighting how these influence load path continuity, buckling capacity, and in-service behavior. The paper outlines typical mast configurations and analyzes connection strategies at critical interfaces — such as at mast ends, cross-arm junctions, and stay anchorages. The influence of cross-arm rigidity and geometric arrangement on mast stiffness and stability is also discussed. Erection methodologies are addressed, including prefabrication of mast assemblies, vertical lifting operations, and staged pretensioning of stays. The sequence of assembly and tensioning is shown to significantly affect the initial force distribution and the mast’s response under axial loads. Techniques to achieve consistent cable pretension — such as torque-controlled tightening, simultaneous tensioning, and verification through mechanical or acoustic methods — are reviewed. A series of case studies are used to illustrate the integration of connection detailing and erection planning into the overall structural strategy. These include the Frick Chemistry Laboratory (United States), Akademie Mont Cenis (Germany), and Astrup Fearnley Museum (Norway), among others, where stayed masts were implemented with varying core materials, cross-sectional geometries, and construction constraints. REFERENCES [1] Gurfinkel G. and Krishnan S. Analysis and Design of Cable-Stayed Steel Columns Using the Stiffness Probe Method, Engineering Journal, American Institute of Steel Construction, 2017, Vol. 54, pp. 195-210. [2] Keil A. Mont-Cenis Academy in Herne, Germany, Structural Engineering International, 2000, Vol.10, No.3, pp. 172-174. [3] Krishnan, S. Cable-stayed columns and their Applications in Building Structures, Journal of Building Engineering, Vol. 27, 2020, https://doi.org/10.1016/j.jobe.2019.100984 [4] Llorens J. Detailing for Fabric Architectural Structures in Fabric Structures in Architecture, Woodhead Publishing Ltd. In association with The Textile Institute, Cambridge, 2015. [5] Llorens J. Detailing Masts, Eds. C. Lazaro, K-U. Bletzinger, E. Onate, Proceedings of the IASS Annual Symposium 2019 – Structural Membranes 2019, Barcelona.