Comparative Study on Stability of Prestressed Cable Systems in Open Cable-Supported Latticed Shell Structures.

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Title:	Comparative Study on Stability of Prestressed Cable Systems in Open Cable-Supported Latticed Shell Structures.
Authors:	Qianqian, QU¹ 7860391886@163.com, Xingmin, HOU² 2653123953@qq.com
Source:	Engineering Letters. Jun2026, Vol. 34 Issue 6, p2307-2316. 10p.
Subjects:	Cable structures, Structural stability, Finite element method, Dynamic stability, Structural shells, Fault tolerance (Engineering)
Abstract:	Thiis study compares the static and dynamic stability of Geiger, Levy, and non-hoop prestressed cable systems on a 109 m single-layer latticed shell. Parametric finite-element models in Midas Gen are analyzed using geometric nonlinear buckling, modal extraction with prescribed initial imperfections, four asymmetric live-load scenarios, and instantaneous single-cable removal. The non-hoop layout achieves the most uniform cable-force distribution, reducing peak cable stress by 28.3% and 25.0% relative to the Geiger and Levy systems, respectively. Sensitivity to initial geometric imperfection increases in the order Geiger Levy non-hoop. At a load factor of 6.0, residual vertical displacements are 1600-1800 mm (1.47%-1.65% of span) for the non-hoop system, whereas the Levy system exhibits 370-600 mm and attains the highest first natural frequency (6.531 Hz). The non-hoop topology, however, provides superior redundancy and a more uniform post-falure response due to its intersecting diagonal network. These findings quantify performance trade-offs among stiffness, redundancy, and robustness, offering evidence-based guidance for topology selection in large-span shell roofs. [ABSTRACT FROM AUTHOR]
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Database:	Engineering Source

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Abstract:	Thiis study compares the static and dynamic stability of Geiger, Levy, and non-hoop prestressed cable systems on a 109 m single-layer latticed shell. Parametric finite-element models in Midas Gen are analyzed using geometric nonlinear buckling, modal extraction with prescribed initial imperfections, four asymmetric live-load scenarios, and instantaneous single-cable removal. The non-hoop layout achieves the most uniform cable-force distribution, reducing peak cable stress by 28.3% and 25.0% relative to the Geiger and Levy systems, respectively. Sensitivity to initial geometric imperfection increases in the order Geiger Levy non-hoop. At a load factor of 6.0, residual vertical displacements are 1600-1800 mm (1.47%-1.65% of span) for the non-hoop system, whereas the Levy system exhibits 370-600 mm and attains the highest first natural frequency (6.531 Hz). The non-hoop topology, however, provides superior redundancy and a more uniform post-falure response due to its intersecting diagonal network. These findings quantify performance trade-offs among stiffness, redundancy, and robustness, offering evidence-based guidance for topology selection in large-span shell roofs. [ABSTRACT FROM AUTHOR]
ISSN:	1816093X