Empirical Scaling of Rotational Spectra of Strong Earthquake Ground Motion

2009 ◽  
Vol 99 (2B) ◽  
pp. 1378-1390 ◽  
Author(s):  
V. W. Lee ◽  
M. D. Trifunac
Author(s):  
Tomiya Takatani ◽  
Hayato Nishikawa

3-D collapsing process analysis of an old Japanese-style one-story wooden structure under two strong earthquake ground motions with a seismic intensity level was car-ried out in order to investigate the seismic performance of this one-story wooden structure without/with seismic retrofit. As a result, this wooden structure collapsed against a strong earthquake ground motion with the JMA seismic intensity “6 upper” level.


Author(s):  
Tomiya Takatani ◽  
Hayato Nishikawa

In Japan, there is a serious and urgent issue on seismic retrofit for a lot of old Japanese-style two-story wooden houses built by a Japanese traditional framed-construction method. In order to investigate the seismic performance of an old Japanese-style two-story wooden house, 3-D non-linear collapsing process analysis of this wooden house was conducted against a strong earthquake ground motion with the Japan Meteorological Agency seismic intensity of “6 upper” level. The effect of post fixing condition under the floor of wooden house on the seismic response of an old Japanese-style two-story wooden house was numerically investigated in this paper. As a result, it was found that seismic collapsing behavior of the wooden house strongly depends on the post fixing condition under its first floor.


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