Collapse Mechanism of Single-Layer Cylindrical Latticed Shell under Severe Earthquake

Haitao Zhou; Yigang Zhang; Feng Fu; Jinzhi Wu

doi:10.3390/ma13112519

Collapse Mechanism of Single-Layer Cylindrical Latticed Shell under Severe Earthquake

Materials (Basel). 2020 Jun 1;13(11):2519. doi: 10.3390/ma13112519.

Authors

Haitao Zhou^{1

2

3}, Yigang Zhang^{2

3}, Feng Fu⁴, Jinzhi Wu^{2

3}

Affiliations

¹ School of Civil and Transportation, Henan University of Urban Construction, Pingdingshan 467001, China.
² Spatial Structure Research Center, Beijing University of Technology, Beijing 100124, China.
³ Key Lab of Urban Security and disaster Engineering, Ministry of Education, Beijing University of Technology, Beijing 100124, China.
⁴ School of Mathematics, Computer Science & Engineering, Northampton Square, City, University of London, London EC1V0HB, UK.

Abstract

In this paper, the results of finite element analyses of a single-layer cylindrical latticed shell under severe earthquake are presented. A 3D Finite Element model using fiber beam elements is used to investigate the collapse mechanism of this type of shell. The failure criteria of structural members are simulated based on the theory of damage accumulation. Severe earthquakes with peak ground acceleration (PGA) values of 0.5 g are applied to the shell. The stress and deformation of the shell are studied in detail. A three-stage collapse mechanism "double-diagonal -members-failure-belt" of this type of structure is discovered. Based on the analysis results, measures to mitigate the collapse of this type of structure are recommended.

Keywords: cylindrical latticed shell; damage accumulation; earthquake; finite element; progressive collapse.