Journal
INTERNATIONAL JOURNAL OF STEEL STRUCTURES
Volume 21, Issue 5, Pages 1859-1877Publisher
KOREAN SOC STEEL CONSTRUCTION-KSSC
DOI: 10.1007/s13296-021-00539-1
Keywords
Single-layer reticulated spherical shell; Static stability; Buckling mode; Instability mode; Initial geometric imperfection
Funding
- Guangxi Natural Science Foundation [2018JJB160052]
- Application of key technology in building construction of prefabricated steel structure [BB30300105]
- Research grant for 100 Talents of Guangxi Plan
- High-level Talents from Guangxi University, Science and Technology Major Project of Guangxi Province [AA18118055]
- Luxembourg National Research Fund for Intuitive modeling and SIMulation platform (IntuiSIM) [PoC17/12253887]
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Based on a large-scale parameter analysis and linear regression method, this study characterized the static stability of Kiewitt-sunflower-type single-layer reticulated spherical shell. It was found that increasing the rise-span and ring-numbers ratio can improve the ultimate stability bearing capacity, and different distribution patterns of geometry defects can affect the structural buckling.
In this study, we use a large-scale parameter analysis and linear regression method to characterize the static stability of Kiewitt-sunflower-type single-layer reticulated spherical shell. Based on more than 15,000 numerical cases of elastic-plastic load-displacement process, and the investigations on the influence of buckling and instability mode, rise-span and ring-numbers ratio, efficiency of the structure, load distribution, support conditions, size of the initial geometric imperfection and distribution patterns are proceeded. We summarize the key effect for stable performance of structure, and develop the formulation to calculate the ultimate capacity of stability. The results show that Kiewitt-sunflower type single-layer reticulated spherical shell is sensitive to defect, and different distribution patterns of geometry defect lead to different structural buckling. The ultimate stability bearing capacity can be improved by increasing the rise-span and ring-numbers ratio. The asymmetrical load distribution has little effect on the stability. The most unfavorable eigenmode is arbitrary, and it is generally not the lowest order. We summarize the key effect for stable performance of structure, and develop the formulation to calculate the ultimate capacity of stability.
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