Development of GIS-Based Building Damage Database for the 1995 Kobe Earthquake
Figure 5: Matching of Point Data within 3m from Polygons of Buildings
Figure 6: Method to Calculate the Shortest Distance between a Point and a Polygon
Figure 7: Integration of Overlapped Point Data Considering the Building Use
4 Conclusion
In this paper, the process to match the different building damage data sets due to the Kobe Earthquake and the importance of it were described. The authors developed this building damage database by matching Nishinomiya Government data and BRI data to supplement insufficient items. The former contains the detailed inventory, i.e., structural type (wooden, RC, steel, light-gauged steel, etc.), roof type of wooden buildings, construction period. On the other hand, the BRI data based on the survey by AIJ and CPIJ is intended for academic contribution. Fragility curves for buildings in Japan have been constructed by some researchers (e.g., Yamaguchi and Yamazaki, 2000) based on the data from the 1995 Kobe Earthquake. However, some of them are based on the tax reduction data with detailed inventory, while the others are based on the BRI data without detailed information on buildings. After the development of the GIS-based building damage database, fragility curves, which are impossible to create without matching the different data sets, can be constructed considering both the detailed building characteristics and rigorous damage classification.
Figure 8: Flow Chart of Matching
Acknowledgements
The digitized spatial data used in this paper were provided by Building Research Institute and Nishinomiya City Government.
References
- Building Research Institute. 1996. Final Report of Damage Survey of the 1995 Hyogoken- Nanbu Earthquake (in Japanese).
- Murao, O., and F. Yamazaki. 1999. Comparison of building damage evaluation by local governments after the 1995 Hyogoken-Nanbu Earthquake. Journal of Architecture, Planning and Environmental Engineering 515, pp.187-194.
- Yamaguchi, N., and F. Yamazaki. 2000. Fragility curves for buildings in Japan based on damage surveys after the 1995 Kobe Earthquake. Proceedings of the 12th World Conference on Earthquake Engineering. Auckland, New Zealand, 8p, CD-ROM
