Advanced Steel Construction

Vol. 13, No. 2, pp. 117-131 (2017)


NONLINEAR STABILITY ANALYSIS OF

A RADIALLY RETRACTABLE SUSPEN-DOME

 

Jianguo Cai*, Yangqing Liu, Jian Feng and Yongming Tu

Key Laboratory of C & PC Structures of Ministry of Education, National Prestress Engineering Research Center, Southeast University, Nanjing 210096, China

*(Corresponding author: E-mail:This email address is being protected from spambots. You need JavaScript enabled to view it.;This email address is being protected from spambots. You need JavaScript enabled to view it.)

Received: 23 December 2015; Revised: 3 March 2016; Accepted: 26 May 2016

  

DOI:10.18057/IJASC.2017.13.2.2

 

ABSTRACT:

A radially retractable roof structure based on the concept of the suspen-dome is proposed in this paper. The radially foldable bar structure are strengthened by the lower cable-strut system. Then the buckling capacity of a radially retractable suspen-dome was investigated. The geometrically non-linear elastic buckling and elasto-plastic buckling analyses of the hybrid structure were carried out. Then the effects of different structural parameters, such as the rise-span ratio, beam section, area and pre-stress of lower cable-strut systems, on the failure load were investigated. The influence of imperfections on the elasto-plastic buckling loads was also discussed. The results show that the critical buckling load is reduced by taking account of material non-linearity. Furthermore, increasing the rise-to-span ratio or the cross-section area of steel beams notably improves the stability performance of the structure. However, the area and pre-stress of cable-strut systems pose small effect on the structural stability. It can also be found that the suspen-dome is highly imperfection sensitive and the reduction of the failure load due to imperfections is considerable.

 

Keywords:

Retractable roof, suspen-dome, stability, elasto-plastic, failure load

 

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