Applications of stiffness-based evaluation method to element importance of truss systems

Jianguo Cai, Wenwen Jia, Jian Feng, Fang Wang, Yixiang Xu

Research output: Journal PublicationArticlepeer-review

13 Citations (Scopus)


Two structural performance indexes, making use of eigenvalues of stiffness matrix, are presented in the study for the evaluation of element importance in the progressive collapse analysis of space trusses. Both indexes are based on the consensus that the element transferring higher loads in the load path is generally more important in the structural system. The first index is formulated as change of the smallest stiffness after removal of specific element, and the second index is defined as determinant of the stiffness matrix. Several simple numerical examples are presented to investigate performance of the proposed indexes; and finally, a square pyramid space grid system is studied as an illustrative example.

Original languageEnglish
Pages (from-to)562-572
Number of pages11
JournalJournal of Civil Engineering and Management
Issue number5
Publication statusPublished - 4 Jul 2017
Externally publishedYes


  • element importance
  • progressive collapse
  • skeletal structures
  • stiffness
  • structural robustness
  • truss system

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Strategy and Management


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