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Force finding of cable–strut structures using a symmetry-based method

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Abstract

Force finding of cable–strut structures is to identify self-equilibrated pre-stress states for structures with given shape, which is a crucial step in the structural design of flexible structures since pre-stresses significantly affect their mechanical behaviors. Utilizing symmetry properties of structures is generally considered as a practical way to facilitate the force finding process. To indicate the symmetric feature of structures, an algebraic indicator is proposed in the context of the equilibrium matrix theory. Furthermore, it is found that the orthogonal projection onto the null space of the equilibrium matrix could show the symmetry properties of structures geometrically. Then, a symmetry-based method of computing feasible pre-stress states is developed in the light of the above orthogonal projection. Finally, the proposed method is applied on three examples to confirm its validity and accuracy.

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Authors and Affiliations

  1. Shanghai Jiao Tong University, Shanghai, China

    Jinyu Zhou, Wujun Chen, Jianhui Hu, Bing Zhao & Tengfei Zhang

  2. Department of Housing and Urban–Rural Development of Sichuan Province, Chengdu, China

    Jinyu Zhou

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  1. Jinyu Zhou
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  2. Wujun Chen
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  3. Jianhui Hu
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  5. Tengfei Zhang
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Correspondence to Wujun Chen.

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Zhou, J., Chen, W., Hu, J. et al. Force finding of cable–strut structures using a symmetry-based method. Arch Appl Mech 89, 1473–1484 (2019). https://doi.org/10.1007/s00419-019-01517-0

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