Blast Resistance of Ionomer-Laminated Glass and the Effect of Negative Blast Pressure
Publication: Journal of Structural Engineering
Volume 149, Issue 1
Abstract
Novel ionomer-laminated glass is popularly adopted as facades or structural elements due to its optical clarity and excellent load-bearing capacity. To better understand the behavior and failure mechanism of ionomer-laminated glass subjected to blast loading, a systematic study, including field blast tests, nonlinear dynamic numerical analysis, and pressure–impulse (P-I) analysis, was carried out. First, a series of full-scale field blast tests were conducted on framed ionomer-laminated glass to investigate the precracking and postcracking responses as well as the failure mode of ionomer-laminated glass subjected to different explosions. The out-of-plane deflection fields over the panel surface were captured using the three-dimensional digital image correlation (3D-DIC) technique. A 3D solid finite-element (FE) model was developed using LS-DYNA for simulating the dynamic response of blast-loaded ionomer-laminated glass. The numerical results were compared with the test results for validation, which shows that the built model can reproduce the response of framed ionomer-laminated glass in both precracking and postcracking phases well. In addition, a P-I analysis was carried out for characterization of the influence of negative blast pressure over a wide range of blast threats. It was found that the negative blast pressure has a significant impact on the glass crack limit when the natural period of the laminated glass is in the same scale as the duration of the blast load, and an obvious influencing zone with the ratio between 0.1 and 1 can be identified. The negative blast pressure has a similar influence on the interlayer rupture limit. Rebounding failure is highly likely to occur when the laminated glass is subjected to blast threats in the influencing zone. Neglecting the negative phase may result in overestimations of the blast resistance of ionomer-laminated glass at both damage levels.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The present study was carried out with financial support from the National Natural Science Foundation of China (No. 51678448) and the State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University (Nos. SLDRCE 14-B-13 and SLDRCE 19-B-18). The authors would like to thank Professor Yong Lu at the University of Edinburgh for the discussions and suggestions on this work.
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Journal of Structural Engineering
Volume 149 • Issue 1 • January 2023
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© 2022 American Society of Civil Engineers.
History
Received: Jun 15, 2022
Accepted: Sep 6, 2022
Published online: Nov 7, 2022
Published in print: Jan 1, 2023
Discussion open until: Apr 7, 2023
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