| Œf�ÚŽGŽ��i˜a�j�F | “ú–{’n�k�HŠwƒVƒ“ƒ|ƒWƒEƒ€˜_•¶�W |
| Vol�F | 10-1Šª |
| ”N�F |
1998”N
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| •Å�F |
1193-1198•Å
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| ’˜ŽÒ�i˜a�j�F |
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| ƒ^ƒCƒgƒ‹�i˜a�j�F |
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| �´˜^�i˜a�j�F |
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| ƒL�[ƒ��[ƒh�i˜a�j�F |
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| Œf�ÚŽGŽ��i‰p�j�F |
THE EARTHQUAKE ENGINEERING SYMPOSIUM PROCEEDINGS
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| ’˜ŽÒ�i‰p�j�F |
Makoto KAMIYAMA,Tadashi MATSUKAWA,Masaru,YOSHIDA
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| ƒ^ƒCƒgƒ‹�i‰p�j�F |
NON-STATIONARY VARIATION OF SOIL RIGIDITY OBSERVED DURING THE 1995 HYOGOKEN NANBU EARTHQUAKE MAKOTO KAMIYAMA, TADASHI MATSUKAWA, MASARU, YOSHIDA
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| �´˜^�i‰p�j�F |
The array-downhole records observed at Port Island during the 1995 Hyogoken Nanbu Earthquake showed a notably non-linear response, suggesting the reduction of rigidity and increase of damping in the soils. Such a non-linear response was confirmed to be not stationary in time. In order to estimate non-stationary variations of rigidity and damping, the complex envelope technique was used together with a finite difference scheme. The method made it clear that the soils near the surface exhibited a remarkably non-stationary variation of rigidity and damping with complicated process of softening and hardening.
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| ƒL�[ƒ��[ƒh�i‰p�j�F |
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| ‹LŽ–‹æ•ª�F |
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| ‹æ•ª�F |
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