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Load Carrying Capacity of Three-way Single-layer Reticulated Dome with Initial Member Crookedness of Prescribed Probabilistic Amplitude

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Single-layer reticulated dome is a typical imperfection-sensitive structure. Initial crookedness of member as a typical imperfection innately exists in reticulated dome. The approach to establish reticulated dome with crooked member is firstly presented, followed by the study of its effect on load-carrying capacity of single-layer three-way reticulated dome. The main conclusions are summarized as follows: load-carrying capacity of the reticulated dome is influenced by initial member crookedness. Compared with the perfect dome, mean of limit load reductions of imperfect ones is 9.35%. The limit load reduction of the imperfect dome is closely related to the distributions of crooked member, and some of them can evidently reduce the limit load. Limit load of the dome obeys extreme I type distribution. Instability modes of imperfect domes considered here belong to nodal instability triggered by member buckling, and there is a dimple in each imperfect dome. The position of dimple is not unique, and it appears in different locations depending on the shape of the imperfect dome. Moreover, the member buckling and the overall buckling of imperfect domes happen simultaneously, i.e. the synchronous instability.
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Keywords: FAILURE MECHANISM; LIMIT LOAD; MEMBER INSTABILITY; NODAL INSTABILITY; RANDOM INITIAL CROOKEDNESS OF MEMBER; THREE-WAY SINGLE-LAYER RETICULATED DOME

Document Type: Miscellaneous

Publication date: June 1, 2019

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  • The Journal of the IASS is the peer-reviewed, quarterly journal of the International Association for Shell and Spatial Structures. The journal mainly presents technical papers and project reports submitted by members or nonmembers of the IASS. Typically, one issue per year focuses on a special topic arranged by guest editors. Additional articles annually include the four Hangai Prize winning papers and Tsuboi Proceedings Award contribution from the IASS annual symposium. Finally, additional content includes announcements of events and memorial statements of distinguished IASS members.
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