Robustness analysis and important element evaluation method of truss structures

Jian Feng, Yifu Sun, Yixiang Xu, Fang Wang, Qian Zhang, Jianguo Cai

Research output: Journal PublicationArticlepeer-review

6 Citations (Scopus)


Robustness and vulnerability are important evaluation criteria for structural safety to improve progressive collapse resistance. Modeling rapid evaluation on important elements in the conceptual analysis stage is an essential and efficient way to ensure the robustness of a design. This paper proposes an evaluation method for element importance by using structural strain energy, which can reflect the influence of geometric topology and external load distribution on the structural safety status simultaneously. Three simple planar trusses are chosen to clarify the proposed method. Moreover, the influences of geometric topology, boundary condition, stiffness distribution and load distribution on the element importance are investigated. This evaluation method also extends to the two spatial truss structures, regular quadrangular pyramid grid structures and chessboard-shaped pyramid grid structures. The distribution characteristics of important elements are obtained. This work defines the element importance distribution law of typical structures. It provides a method for rapid robustness analysis of general truss structures, which can be effectively integrated into the existing analysis platform.

Original languageEnglish
Article number436
Issue number10
Publication statusPublished - Oct 2021


  • Element importance coefficient
  • Robustness
  • Strain energy
  • Symmetry
  • Truss structure

ASJC Scopus subject areas

  • Architecture
  • Civil and Structural Engineering
  • Building and Construction


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