Proposal of New Foundation Construction Works with High Damping and Mitigation Performance; Part 1 Forced Vibration Tests of Two Types of Foundation Blocks and Simulation Analyses

Abstract eng:
This study focuses on the progress of the damping and mitigation performance of foundations that will be built at soft ground sites, and proposes an improved foundation technique which implements backfilling of a damping composite material into trenches dug along a foundation area. The damping material is a mixture of asphalt with crushed stones and scrap tire chips. Forced vibration tests were conducted to confirm the effectiveness of the proposed foundation technique on two types of foundation blocks, those being, CF and IF; the former was constructed by a conventional construction method and the latter applied to the improved foundation technique mentioned above. We have carried out the 3-dimensional simulation analyses adopting a hybrid approach in which two foundations and the soil region adjacent the foundations are rendered using the 3-dimensional finite element model. Comparing with the response of the both foundations, it has been confirmed that the damping material adopted in the IF provides good attenuation and mitigation performance.

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