抄録
Although many reinforced concrete rock shelters have been designed against static loads that are of same level as the maximum rock impact, the design should be carried out by dynamic analyses.
In order to grasp shelter slab's behavior under falling rock impact, we executed dyna-mic and static loading experiments on RC slabs with sand cushion. It was found from the results that impact force brings far less displacement or strain to RC slab than that of static loading case. Time-lag between impact force and slab's response explanes most part of such difference. The result of these experiments were ascertained by F. E. M analyses, and at the same time, a dynamic design method for rock shelter was presented.
