�@ Œf�ÚŽGŽ��i˜a�j�F “ú–{’n�k�HŠwƒVƒ“ƒ|ƒWƒEƒ€˜_•¶�W Vol�F 9-1Šª ”N�F 1994”N •Å�F 229-234•Å ’˜ŽÒ�i˜a�j�F ‹Êˆä�@�­�l�C�@–x‰Æ�@�³‘¥�C�@’|“à�@‹g�O�C�@—é–Ø�@‰p�¢�C�@�A’|�@•xˆê ƒ^ƒCƒgƒ‹�i˜a�j�F ‰”’¼ƒAƒŒƒC‹L˜^‚É‚æ‚é‹­�kŽž‚Ì•\‘w’n”Õ‚Ì”ñ�üŒ`�«‚ÌŠm”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 Masato TAMAI, Masanori HORIKE, Yosihiro TAKEUCHI, Hideyo SUZUKI, Tomiichi UETAKE ƒ^ƒCƒgƒ‹�i‰p�j�F VERIFICATION OF NON-LINEALITY OF SURFICIAL LAYER USING VERTICAL-ARRAY STRONG-MOTION DATA �´˜^�i‰p�j�F
We examine the non-linearity of surficial layers using vertical-array data at four sites, comparing strong-motion and weak-motion spectral ratios ( surface /underground ). A numerical code for calculating time-domain responses of the non-linerity is used to examine an empirical initial loading curve derived from the laboratory measurements appropriate for our sites. We discuss factors owing mainly to the non-linearity such as peak accelerations, soil conditioans, and strain level. ƒL�[ƒ��[ƒh�i‰p�j�F - ‹LŽ–‹æ•ª�F - ‹æ•ª �@�@�@ˆÏˆõ‰ï˜_•¶�W