Analysis of key elements of single-layer dome structures against progressive collapse

Qian Zhang , Wenxing Huang , Yixiang Xu , Jianguo Cai , Fang Wang , Jian Feng

Abstract

The analysis of the progressive collapse resistance of structures is a well-known issue among structural engineers. Large-span reticulated dome structures are commonly utilized in large public buildings, necessitating research into their progressive collapse resistance to assure user safety. The most significant part of improving the structural resilience of reticulated domes is to evaluate their key elements. Based on a stiffness-based evaluation approach, this work offers a calculating procedure for element importance coefficient. For both original and damaged structures, evaluations are carried out using the global stiffness matrix and the determinant. The Kiewitt, Schwedler, and Sunflower reticulated domes are investigated to explore the distribution characteristic of element importance coefficients in the single-layer dome structures. Moreover, the influence of the load levels, load distributions, geometric parameters and topological features are also discussed. The results can be regarded as the initial concept design reference for single-layer reticulated domes.

Key Words

importance coefficient; single-layer domes; stiffness; geometry; topology

Address

Qian Zhang — 1) National Prestress Engineering Research Center, Key Laboratory of C & PC Structures of Ministry of Education Southeast University, Nanjing 210096, China 2) Department of Structural Engineering and Building Materials, Faculty of Engineering and Architecture, Ghent University, Valentin Vaerwyckweg 1, 9000 Ghent, Belgium
Wenxing Huang — School of Aerospace, The University of Nottingham Ningbo China. No.199 Taikang East Road, Ningbo, 315100, China
Yixiang Xu — School of Aerospace, The University of Nottingham Ningbo China. No.199 Taikang East Road, Ningbo, 315100, China
Jianguo Cai — National Prestress Engineering Research Center, Key Laboratory of C & PC Structures of Ministry of Education Southeast University, Nanjing 210096, China
Fang Wang — National Prestress Engineering Research Center, Key Laboratory of C & PC Structures of Ministry of Education Southeast University, Nanjing 210096, China
Jian Feng — National Prestress Engineering Research Center, Key Laboratory of C & PC Structures of Ministry of Education Southeast University, Nanjing 210096, China

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