応答制御用付加柱を組み込んだ既存ピロティ建築物の部分仮動的実験

概要

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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. This device is made by High Performance Fiber Reinforced Cementitious Composite (HPFRCC), which exhibits multiple cracking and strain-hardening characteristics in the uni-axial tensile stress. It has been found that the HPFRCC device shows a very good ductile structural manner in conjunction with a high resistance capacity against the axial force. 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. A substructure pseudo-dynamic test were conducted in order to investigate the advantages by using HPFRCC devices, and to confirm the seismic response analyses. As the result of the experiment, the seismic response of the RC buildings with soft story was successfully controlled by using HPFRCC device, and the reliability of the analytical tool has also been clarified.
2005-10-30