期刊
ENGINEERING STRUCTURES
卷 232, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.engstruct.2020.111802
关键词
Double-ring joint; Single-layer reticulated shell; Buckling
资金
- National Natural Science Foundation of China [51978151]
- National Key Program Foundation of China [51538002]
- Scientific Research Foundation of Graduate School of Southeast University [YBPY1963]
Through experimental and numerical studies, it was found that the reticulated shell with double-ring joints does not damage the joints when the structure fails, with a buckling capacity of about 70% of the rigidly jointed shell. The nonlinear buckling capacity and initial stiffness of the reticulated shell with double-ring joints are approximately 66% of that of the rigidly jointed shell.
A single-layer freeform reticulated shell with assembled double-ring joints was studied experimentally and numerically. Damping and static testing of a quarter-scale model was carried out. In addition, finite element models of the single-layer grid shells with double-ring joints and rigid joints were established, and the mechanical properties of the two shells were compared. The main conclusions are as follows. The eigenvalue buckling mode of the reticulated shell with double-ring joints is local buckling, and the double-ring joint is undamaged when the structure fails. The buckling capacity of the reticulated shell with a double-ring joint is approximately 70% of that of the rigidly jointed shell. The nonlinear buckling capacity and initial stiffness of the reticulated shell with a double-ring joint are approximately 66% of that of the rigidly jointed shell.
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