免震材料の適応選択に関する基礎的研究

概要

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An arrangement of base-isolation devices is required in the design of base-isolated structures. Determining the arrangement of isolators during the design phase, however, is a time-consuming job. Furthermore, generally the arrangement currently depends heavily on the skill and experience of the design engineer. To overcome these drawbacks, an adaptive selection system for isolators based on their seismic performance was developed. The main purpose of this study was to develop an adaptive selection system in which a genetic algorithm and simulated annealing are used to arrange isolators and the arrangement is determined based on the (1) response displacement of the base-isolation layer, (2) response acceleration of the superstructure, (3) natural period of the base-isolated structure, (4) eccentricity of the base-isolation layer, and (5) vertical load for each isolator. In this study, we evaluated the base-isolated structure, which is subjected to earthquake and wind, with arrangements of base-isolation devices determined for safety and living comfort. Our adaptive selection system was applied to actual structures. The evaluation results also show that the adaptive arrangement for wind performance differed from that for seismic performance and that achieving a certain living comfort by using our system was difficult.
一般社団法人日本建築学会の論文
2004-03-20