Finite element analysis of the elastic static properties and stability of pretensioned cylindrical reticulated mega-structures |
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| Affiliation: | 1. College of Civil Engineering of Hunan University, Changsha 410082, PR China;2. Lanzhou University, Lanzhou 730000, PR China;3. Changsha Planning & Design Institute Co. Ltd, Changsha 410000, PR China;1. Developmental Lung Biology, Cardiovascular Pulmonary Research Laboratories, Departments of Pediatrics and Medicine, University of Colorado Denver, Denver, CO, USA;2. Department of Anesthesiology, Eastern Colorado Veterans Affairs Medical Center and University of Colorado Denver, Denver, CO, USA;1. Mechanical and Mechatronics Engineering Department, University of Waterloo, Ontario, Canada;2. Earth and Environmental Sciences Department, University of Waterloo, Ontario, Canada;3. InspecTerra Inc. Waterloo, Ontario, Canada;1. Laboratoire de Tribologie et Dynamique des Systèmes, École Centrale de Lyon - 36, Avenue Guy de Collongue, 69134 Ecully, France;2. Institut Camille Jordan, École Centrale de Lyon - 36, Avenue Guy de Collongue, 69134 Ecully, France;1. School of Civil Engineering and Architecture, Xi''an University of Technology, Xi''an, Shaanxi, 710048, PR China;2. School of Mechanics, Civil Engineering and Architecture, Northwestern Polytechnical University, Xi''an, Shaanxi, 710072, PR China |
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| Abstract: | For the cylindrical reticulated mega-structure, two types of cable-strut arrangements are presented. The basic static properties of the pretensioned reticulated mega-structures with different types of cable-strut arrangements are compared and the optimal one is then selected. The elastic static property and stability of the structure with the optimal cable-strut arrangement is comprehensively analyzed. And the indexes including the decrease in structural displacement, reduction in horizontal support reactions, uniformity of distribution of member forces, and the improvement of structural stability are compared with those of the corresponding non-pretensioned reticulated mega-structure. Also, the effect of values and distribution of the cable pretensions on structural stability is studied, and the influence of half-span loading on structural stability is investigated. Results indicate that the static properties and stability of the structure can be most effectively improved for adoption of the crossover arrangement of the cables and struts according to the buckling shape of the non-pretensioned structure. Additionally, the ultimate load-carrying capacity of the structure with small ratio of rise to span can be more effectively improved when the pretension of the cables set in the mid-span is larger than that of the cables set on both sides of the structure. |
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