|DC.description||National Central University||en_US|
|dc.description.abstract||From the results of experiment, it was revealed that the amplitude of ground surface acceleration of different horizontal distances measured at the moment of impact were reduced as the distance increased due to the geometrical and the material damping effect. Therefore, as to the distance between the impact source and the isolation trench in the concern of passive isolation it was found that the farther the distance the better the isolation effect, theoretically. However, if the size of operation area was restricted, the distance should be at least greater than 3 times of wavelength. This result was consistent with that of Segol’s study (1978) using digital simulation.
Besides, in the studies of active isolation, the experimental results from different depth of isolation trench indicated that the depth of isolation trench should be at least 0.7 times of wavelength to reduce the amplitude of ground surface acceleration to 25 percent of that without an isolation trench. However, when the depth of isolation trench was greater than 0.9 times of wavelength, there was no significant increase in the effect of isolation.||en_US|
|DC.subject||dynamic consolidation method||en_US|
|DC.subject||depth of isolation trench||en_US|
|DC.subject||distance between isolation trench and source of im||en_US|
|DC.publisher||National Central University||en_US|