Locate Damage based on Change in Structural Shape Calculated from Uniform Load Surface
Reticulated shell structures have been widely built for public assembly venues, where many people get together during events. Therefore, it is important to conduct condition assessment for this type of structure to ensure the safety of the general public. Considering that the member configuration of this type of structure may follow a regular pattern and damage in a local region may destroy the regular pattern, a damage detection approach based on the change in structural shape is proposed in this study. The change in structural shape can be obtained from the displacement at each joint. Since it may be difficult to measure displacements on this type of structure, it is proposed to use the uniform load surface calculated from the constructed modal flexibility matrix to represent displacements at joints. Therefore, this approach requires the measurement of acceleration responses, instead of displacement measurement. For validating the feasibility of the proposed approach, numerical simulations are conducted on a single-layer dome structure with different levels of damage severity considered. The obtained results verify that the proposed approach is capable of locating damage to exact members.
G. G. Yan et al., "Locate Damage based on Change in Structural Shape Calculated from Uniform Load Surface," Proceedings of the ASME 2016 Conference on Smart Materials, Adaptive Structures and Intelligent Systems (2016, Stowe, VT), vol. 1, American Society of Mechanical Engineers (ASME), Sep 2016.
The definitive version is available at https://doi.org/10.1115/SMASIS2016-9213
ASME 2016 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2016 (2016: Sep. 28-30, Stowe, VT)
Civil, Architectural and Environmental Engineering
Keywords and Phrases
Damage detection; Intelligent materials; Intelligent systems; Structural frames; Structural health monitoring; Structures (built objects); Acceleration response; Condition assessments; Detection approach; Modal flexibility matrix; Regular patterns; Reticulated shell structure; Structural shape; Uniform load surface; Structural design
International Standard Book Number (ISBN)
Article - Conference proceedings
© 2016 American Society of Mechanical Engineers (ASME), All rights reserved.
01 Sep 2016
The authors greatly appreciate the financial support from National Science Foundation, the Hazard Mitigation and Structural Engineering program, through the project of "Damage and Instability Detection of Civil Large-scale Space Structures under Operational and Multi-hazard Environments" (Award No.: 1455709).