RED-ACT Report: 0424, M4.8 New Zealand Dannevirke Earthquake
RED-ACT Report
Real-time Earthquake Damage Assessment using City-scale Time-history analysis
Apr. 24, M4.8 New Zealand Dannevirke Earthquake
Research group of Xinzheng Lu at Tsinghua University (luxz@tsinghua.edu.cn)
First reported at 14:00, Apr. 25, 2019 (Beijing Time, UTC +8)
Acknowledgments and Disclaimer
The authors are grateful for the data provided by GeoNet. This analysis is for research only. The actual damage resulting from the earthquake should be determined according to the site investigation.
Scientific background of this report can be found at:
http://www.luxinzheng.net/software/Real-Time_Report.pdf
1. Introduction to the earthquake event
At Apr 24 2019 4:37 (Local Time), an M 4.8 (GeoNet) earthquake occurred in New Zealand Dannevirke. The epicenter was located at 175.97 -40.26, with a depth of 25.0 km.
2. Recorded ground motions
33 ground motions near to epicenter of this earthquake were analyzed. The names and locations of the stations can be found Table 1. The maximal recorded peak ground acceleration (PGA) is 42 cm/s/s. The corresponding response spectra in comparison with the design spectra specified in the Chinese Code for Seismic Design of Buildings are shown in Figure 1.
Figure 1 Response spectra of the recorded ground motions with maximal PGA
3. Damage analysis of the target region subjected to the recorded ground motions
Using the real-time ground motions obtained from the strong motion networks and the city-scale nonlinear time-history analysis (see the Appendix of this report), the damage ratios of buildings located in different places can be obtained. The building damage distribution and the human uncomfortableness distribution near to different stations is shown in Figure 2 and Figure 3, respectively. These outcomes can provide a reference for post-earthquake rescue work.
Figure 2 Damage ratio distribution of the buildings near to different stations
Figure 3 Human uncomfortableness distribution near to different stations
Scientific background of this report can be found at: http://www.luxinzheng.net/software/Real-Time_Report.pdf
Table 1 Names and locations of the strong motion stations
No.Station NameLongitudeLatitude
120190423_163716_TSZ_20175.9611-40.0586
220190423_163716_WDPS_20175.8697-40.3383
320190423_163720_MNGS_20175.7908-39.8078
420190423_163720_TRMS_20175.9911-40.6714
520190423_163721_MRZ_20175.5786-40.6606
620190423_163721_PGFS_20176.6117-40.3022
720190423_163722_WPWS_20176.5844-39.9439
820190423_163724_CPFS_20176.2208-40.8989
920190423_163725_WRCS_20175.6478-40.9503
1020190423_163726_WCDS_20175.0481-39.9336
1120190423_163728_HNPS_20176.88-39.6711
1220190423_163728_PAPS_20175.005-40.9144
1320190423_163728_WAZ_20174.9856-39.7547
1420190423_163729_UHCS_20175.0408-41.1269
1520190423_163730_NGHS_20176.915-39.4858
1620190423_163731_BMTS_20174.9261-41.1914
1720190423_163731_INSS_20174.9211-41.2336
1820190423_163731_PHHS_20174.9042-41.2522
1920190423_163731_WANS_20174.9311-41.2311
2020190423_163732_PTOS_20174.8603-41.2231
2120190423_163732_SOMS_20174.865-41.2575
2220190423_163733_MISS_20174.8183-41.315
2320190423_163733_POTS_20174.7747-41.2722
2420190423_163733_WDAS_20174.9483-41.2575
2520190423_163733_WEL_20174.7681-41.2842
2620190423_163733_WEMS_20174.7792-41.2742
2720190423_163735_PWES_20174.8258-41.1275
2820190423_163740_MTHZ_20176.8411-38.8522
2920190423_163741_TEPS_20174.7811-41.2906
3020190423_163741_TPPS_21176.0675-38.6864
3120190423_163743_RTZ_20176.9806-38.6156
3220190423_163747_NCDS_20176.8761-39.4983
3320190423_163749_TLZ_20175.5381-38.3294
---End---
相关研究