RED-ACT Report for Jan. 25, Japan Nagano-ken Nambu Earthquake
RED-ACT Report
Real-time Earthquake Damage Assessment using City-scale Time-history analysis
Jan. 25, Japan Nagano-ken Nambu Earthquake
Research group of Xinzheng Lu at Tsinghua University
luxz@tsinghua.edu.cn
First reported at 22:40, Jan. 25, 2019 (Beijing Time, UTC +8)
Acknowledgments and Disclaimer
The authors are grateful for the data provided by K-NET and KiK-net.
This analysis is for research only. The actual damage resulting from the earthquake should be determined according to the site investigation.
1. Introduction to the earthquake event
At 21: 10, Jan. 25, 2019 (Local Time, UTC +9), an M 3.4 (JMA) earthquake occurred in Nagano-ken Nambu, Japan. The epicenter was located at 36.0N, 137.6E, with a depth of 10.0 km.
2. Recorded ground motions
Ten ground motions near to epicenter of this earthquake were analyzed. The maximal recorded peak ground acceleration (PGA) is 87cm/s/s.
No.Station NameLongitudeLatitude
1GIF003137.30136.3322
2GIF004137.51736.2492
3GIF007137.48636.0378
4GIF008137.2635.9515
5GIF010137.24535.8029
6NGN013137.78536.1833
7NGN017137.82635.9748
8NGN018137.5335.8132
9NGN019137.70835.8562
10NGN022137.61335.6079
3. Seismic damage analysis for 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. These damage ratios can provide a reference for post-earthquake rescue work. The damage ratio distribution of the buildings near to different stations is shown in Figure 1. The human comfortableness distribution near to different stations is shown in Figure 2.
The details can be accessed at
http://www.luxinzheng.net/software/2019-01-25-Japan-3.4.html
http://www.luxinzheng.net/software/2019-01-25-Japan-3.4-Acc.html
Figure 1 Damage ratio distribution of the buildings near to different stations
Figure 2 Human comfortableness distribution near to different stations
---------End--------
相关研究