空間の確保と損傷の防止を目的とした既存ピロティ建築物の地震応答制御

概要

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Collapse or severe damage has been observed in many RC residential buildings with soft story at the previous earthquake disasters. Hence development of an effective structural control technology is one of the urgent tasks for residential apartments in the urban area. However, most of the conventional structural control methods for soft story buildings stuff a space with structural elements such as RC walls or response control dampers. This paper proposes a new technique for structural control of RC buildings with soft story by using ductile short columns as response control devices placed beside the existing columns at the soft story. The objective of the response control is upgrading safety as well as reparability for damage mitigation without partitioning off the spaces at the soft story. The main role of these devices are to increase story shear capacity to reduce response drift of the soft story, and to support axial force due to overturning moment in order to reduce axial force acting on the soft story columns. Results of the inelastic earthquake response analysis indicate that yielding of the soft story column can be successfully prevented since the response control devices work effectively.
社団法人日本建築学会の論文
2004-06-30