�@ Œf�ÚŽGŽ��i˜a�j�F “ú–{’n�k�HŠwƒVƒ“ƒ|ƒWƒEƒ€˜_•¶�W Vol�F 8-1Šª ”N�F 1990”N •Å�F 313-318•Å ’˜ŽÒ�i˜a�j�F - ƒ^ƒCƒgƒ‹�i˜a�j�F - �´˜^�i˜a�j�F
- ƒL�[ƒ��[ƒh�i˜a�j�F - Œf�ÚŽGŽ��i‰p�j�F PROCEEDINGS OF THE JAPAN EARTHQUAKE ENGINEERING SYMPOSIUM ’˜ŽÒ�i‰p�j�F Ken-ichi TOKIDA, Keiichi TAMURA, Koh AIZAWA ƒ^ƒCƒgƒ‹�i‰p�j�F ATTENUATION CHARACTERISTICS OF GROUND STRAINS DURING EARTHQUAKE BASED ON DENSE ARRAY �´˜^�i‰p�j�F
The appropriate estimation of ground strains induced during earthquake is indispensable for the seismic design of buried lifeline facilities such as pipeline systems. The ground strains induced during earthquake are calculated with use of the dense instrument array data obtained at the Public Works Research Institute during past 78 earthquakes. The empirical formulae of attenuation of the maximum ground strains indused during earthquake are proposed in terms of earthquake magnitude and epicentral distance. ƒL�[ƒ��[ƒh�i‰p�j�F - ‹LŽ–‹æ•ª�F - ‹æ•ª �@�@�@ˆÏˆõ‰ï˜_•¶�W