Title

Instability Signature for Detecting Snap-Through Buckling of Dome Structures

Abstract

Dome structures have been built as roofs for venues where many people convene. Failure of this type of structure may jeopardize the safety of hundreds or even thousands people. For this type of structure, snap-through buckling may occur in a local area and gradually expand to the entire structure, leading to a failure of the overall structure. Although numerous structural health monitoring techniques and damage detection approaches have been developed, no research on the detection of a snap-through buckling has been reported. The objective of this study is to find a signature that is sensitive to snap-Through buckling in dome structures and can be used to detect snap-Through buckling. Considering that a snap-Through buckling results in a significant deformation in a local area, which can be reflected by the change in tilting angles of members in that local area, the change in tilting angles of members will be proposed to be a signature to detect snap-through buckling. To verify the proposed instability signature, a reticulated dome structure will be investigated. Both an eigenvalue buckling analysis and a nonlinear buckling analysis will be conducted. The significant changes in tilting angles of members in the buckled regions have demonstrated the efficacy of the proposed instability signature. This research will bridge the research gap between structural health monitoring and structural stability research.

Meeting Name

SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring (2016: Mar. 21-24, Las Vegas, NV)

Department(s)

Civil, Architectural and Environmental Engineering

Keywords and Phrases

Damage detection; Domes; Eigenvalues and eigenfunctions; Error detection; Stability; Structural health monitoring; Structures (built objects); Buckling analysis; Detection approach; Dome structure; Nonlinear buckling analysis; Snap-through buckling; Structural health; Structural stabilities; Tilting angle; Buckling; Detection

International Standard Book Number (ISBN)

978-1-5106-0044-7

International Standard Serial Number (ISSN)

0277-786X; 1996-756X

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2016 SPIE, All rights reserved.

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