)
56 71 71 71 SI 135 62 71 103 85 64 27 49 133 55 89 59 50 57 75 23 76 59 55 71 47 55 168 57 103 50 50 104 68 88 73 168 56 47 71 80 55 75 67 46 59 62 55 100 47 76 174 46 50 85
15 5 15 0 5 0 SI Spectrum IntensitySI 0.12.5 cm/sec
kine 63.5kg 75cm 30cm ()()() ( ) () 1 cm mm kine
=cm/sec gal=cm/sec 200 100 1993
50100m N 50 S 300700m/sec S 700m/sec 200 10100
0.005mm 0.005mm 0.075mm 0.075mm2.0mm 2.0mm75mm
3000m/sec 200 km P P P S
Hz 1 0.1 1
1948 23 98100% 1949 1995 70 50 20 70 20 50
() km km 2900km
25
10 10 1m 1 10cm 50100m 3000m/s 50100m 1 10
70 50D50
0.2 1.0 48 7 12 143 http://www.stat.go.jp/data/mesh/02.htm JIS X0410:1976 500m 1km 1km 4 3 45 500m 30 (Reinforced Concrete) (Steel)