Application research on digital twins of urban earthquake disasters

Figures & data

Figure 1. Concept map of earthquake disaster city digital twin.

Figure 2. Local point cloud data.

Figure 3. Local 3D base model of the city.

Figure 4. Technical route of digital twin construction in earthquake disaster city.

Figure 5. Intensity results of the ground motion attenuation model.

Table 1. Comparison of model calculated intensity and historical calculated intensity.

Scale fibre of seismic intensity	Historical calculation of intensity area (km^2)	The model calculates the intensity area (km^2)	Area difference (km^2)	Error rate (%)
X-X^+	3100.37	6035.33	−2,934.96	−94.66
IX	4961.34	12486.14	−7,524.8	−151.67
VIII	9127.29	64666.17	−55,538.88	−608.49
VII	45136.55	105365.72	−60,229.17	−133.44

Figure 6. Overview of the study area.

Figure 7. Simulated seismic intensity.

Figure 8. Earthquake damage distribution of buildings in Pingluo County.

Table 2. Earthquake damage of buildings.

Seismic damage index	Number of buildings (building)	Proportion (%)
0–0.1	44	0.68
0.1–0.3	702	10.86
0.3–0.55	1322	20.45
0.55–0.85	1370	21.18
0.85–1.0	3028	46.83

Figure 9. Fusion of preset angle photo and 3D model patch.

Data availability statement

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