RED-ACT: Feb. 19, M4.5 Japan Nagano-ken

RED-ACT Report

Real-time Earthquake Damage Assessment using City-scale Time-history analysis

Feb. 19, M4.5 Japan Nagano-ken Hokubu Earthquake

Research group of Xinzheng Lu at Tsinghua University (luxz@tsinghua.edu.cn)

First reported at 20:45, Feb. 19, 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: 04, Feb. 19, 2019 (Local Time, UTC +9), an M 4.5 (JMA) earthquake occurred in Nagano-ken Hokubu. The epicenter was located at 137.7E 36.5N, with a depth of 10.0 km. 

2. Recorded ground motions

7 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 28 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

The details can be accessed at 

http://www.luxinzheng.net/software/2019-02-19-Japan-4.5.html 

http://www.luxinzheng.net/software/2019-02-19-Japan-4.5-Acc.html  

Table 1 Names and locations of the strong motion stations

No. Station Name Longitude Latitude

1 GIF003 137.301 36.3322

2 GIF004 137.517 36.2492

3 NGN005 137.854 36.6981

4 NGN006 137.851 36.5086

5 NGN009 137.869 36.3378

6 NGN012 137.978 36.2564

7 NGN013 137.785 36.1833

------End------

相关研究

相关文章，在仿真秀官网搜索：

1. 场地-城市耦合弹塑性分析+神威太湖之光+无人机 | 三项黑科技助力新北川县城震害预测

2. 新论文：扔砖头、跳盒子，这也是做科学试验哦！ | 地震次生坠物情境中的人员疏散模拟

3. 新论文：改变框架-核心筒结构剪力调整策略对其抗震性能影响的研究
   

4. 综述：城市抗震弹塑性分析及其工程应用

5. 新论文：适用于多LOD BIM的建筑地震损失评估
   

6. 新论文：新型地震和连续倒塌综合防御韧性PC框架承载力计算方法
   

7. 新论文：角柱失效后平板结构连续倒塌行为实验研究
   

8. 新论文：城市建筑群多LOD震害模拟及北京CBD算例

9. 美国NSF SimCenter+清华城市弹塑性分析=旧金山184万建筑地震模拟
   

10. 新论文：受折纸启发的可更换承载-耗能双功能耗能器
    

11. 新综述论文：21世纪建筑结构连续倒塌和鲁棒性的研究和实践

12. 新论文：中柱失效后板柱结构连续倒塌传力机理研究

13. 新论文：一根钢筋混凝土梁，承载力你能算对么？| 梁的压拱效应计算方法

14. 新论文：无人机+机器学习+城市弹塑性分析=震后近实时损失预测

15. 新论文：这个混凝土框架能抗震，能防连续倒塌，还功能可恢复，您不进来看看么？

16. 新论文：一个好汉三个帮|带端部阻尼器伸臂桁架的抗震性能试验研究

17. 新论文：BIM+新一代性能化设计=喷淋系统破坏后的地震次生火灾模拟

18. 新论文：村镇建筑群火灾蔓延模拟与案例

19. 新论文：建设地震韧性城市所面临的挑战 
    

20. 新论文：烈焰焚城 | 地震次生火灾的精细化和高真实感模拟
    

21. 新论文：城市韧性——基于“三度空间下系统的系统”的思考

22. 新论文：防屈曲支撑伸臂桁架？几个“狗骨头”可少不了！
    

23. 新论文：城市抗震弹塑性分析中如何确定高层建筑的损伤程度？

24. 新论文：考虑楼板影响的钢筋混凝土框架边柱连续倒塌试验
    

25. 新论文：提高地震荷载分项系数，抗震安全性提高了多少？

26. 新论文：采用减振子结构来控制超高层建筑的地震楼面加速度
    

27. 新论文：500m级超高层建筑简化模型及其在结构体系对比中的应用

28. 606m 超高层建筑OpenSees模型