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| | Abstract | | Nepal Ghorka earthquake (Mw 7.8) occurred on April 25, 2015, and over 800,000 houses were destroyed. Immediately after the earthquake, field surveys were conducted five times to grasp the damage situation in the entire Kathmandu Valley. Most of the damaged buildings are reinforced concrete infilled walls (RCIW)typein Kathmandu. In the damage survey conductedalong the microtremor observation line passing through the point where the long period ground motion with a period of 4 seconds was prominent, no correlation was found between the damage status of the structure and this long period superiority. Therefore,we focused on single point tremor observation, microtremor array observation and surface wave exploration focusing on the damage concentration area. The damage condition and the shear wave structure of the ground were compared. |
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