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Article

Robustness Analysis and Important Element Evaluation Method of Truss Structures

by
Jian Feng
1,
Yifu Sun
1,
Yixiang Xu
2,
Fang Wang
1,
Qian Zhang
1 and
Jianguo Cai
1,*
1
Key Laboratory of C & PC Structures of Ministry of Education, National Prestress Engineering Research Center, Southeast University, Nanjing 211189, China
2
School of Aerospace, The University of Nottingham Ningbo China, No.199 Taikang East Road, Ningbo 315100, China
*
Author to whom correspondence should be addressed.
Buildings 2021, 11(10), 436; https://doi.org/10.3390/buildings11100436
Submission received: 1 August 2021 / Revised: 23 September 2021 / Accepted: 23 September 2021 / Published: 26 September 2021
(This article belongs to the Section Building Structures)
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Abstract

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.
Keywords: element importance coefficient; robustness; strain energy; truss structure; symmetry element importance coefficient; robustness; strain energy; truss structure; symmetry

Share and Cite

MDPI and ACS Style

Feng, J.; Sun, Y.; Xu, Y.; Wang, F.; Zhang, Q.; Cai, J. Robustness Analysis and Important Element Evaluation Method of Truss Structures. Buildings 2021, 11, 436. https://doi.org/10.3390/buildings11100436

AMA Style

Feng J, Sun Y, Xu Y, Wang F, Zhang Q, Cai J. Robustness Analysis and Important Element Evaluation Method of Truss Structures. Buildings. 2021; 11(10):436. https://doi.org/10.3390/buildings11100436

Chicago/Turabian Style

Feng, Jian, Yifu Sun, Yixiang Xu, Fang Wang, Qian Zhang, and Jianguo Cai. 2021. "Robustness Analysis and Important Element Evaluation Method of Truss Structures" Buildings 11, no. 10: 436. https://doi.org/10.3390/buildings11100436

APA Style

Feng, J., Sun, Y., Xu, Y., Wang, F., Zhang, Q., & Cai, J. (2021). Robustness Analysis and Important Element Evaluation Method of Truss Structures. Buildings, 11(10), 436. https://doi.org/10.3390/buildings11100436

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