Application research on digital twins of urban earthquake disasters

Abstract

The digital twin of an earthquake disaster city constructed using digital twin technology can reflect the data of different stages of the earthquake disaster in the virtual space and can ensure high synchronisation and simulation of the two to effectively improve the safety of emergency rescue personnel and the scientific decision-making ability of decision makers. Oblique photogrammetry matched the Light Detection and Ranging (LiDAR) data to complete a high-precision three-dimensional real-scene model. The urban digital twin model was established as a module with the three-dimensional base model generated by the two-dimensional frame data with a fast update speed. Based on the shortest-fault-distance intensity-attenuation model, the seismic intensity was calculated using a known active fault and aftershock sequence, and the applicability of this method was verified. The elastic-plastic time history analysis method was used to calculate the seismic response of the building, and the seismic damage level was visualised using a three-dimensional model. The dynamic changes of earthquake disasters are monitored by sensors in real time and analysed in a digital twin model to provide an optimal scheme for earthquake emergency rescue and accurate evaluation results of earthquake disasters.

Keywords:

• Digital twin
• three-dimensional reality
• earthquake damage simulation
• earthquake emergency rescue

Authors’ contributions

Conceptualisation, S. Y.; methodology, S. Y.; formal analysis, S. Y. and Q. L.; investigation, N. Z. and C. L.; resources, Q. L.; data curation, S. Y.; writing—original draft preparation, S. Y.; writing—review and editing, S. Y.; supervision, S. S. and X. Z.; and project administration, S. Y. and Q. L. All authors have read and agreed to the published version of this manuscript.

Data availability statement

Seismic and earthquake-shaking data were obtained by contacting the corresponding author on reasonable grounds.

Disclosure statement

The authors declare no competing interests.

Correction Statement

This article has been corrected with minor changes. These changes do not impact the academic content of the article.

Additional information

Funding

This work was funded by the Natural Science Foundation of Ningxia Province (2023AAC03807; 2021AAC03480) and the Second Plateau Scientific Expedition and Research (2019QZKK0901), and the Ningxia Earthquake Science and Technology Innovation Team (CX2023-03; CX2023-04).