滑車装置を用いた制振構造システムの実験的研究: 棟頂部に設置したダンパーを増幅させる制振機構を有する建物の振動実験と解析

摘要

At the 2011 Great East Japan Earthquake on March 11,2011, high-rise buildings in Tokyo, Nagoya and Osaka shook largely because of the effect of long period component of earthquake ground motions. Especially, the large floor movement of 136 cm amplitude was observed at the 52nd floor of an office building in Osaka, locating 770 km away from the epicenter. By this shaking, all 32 lifts stopped and people were trapped in four of them. Damage to non-structural members such as falling of gypsum board and ceiling panels were observed extensively. To avoid such damage and keep safety and function of high-rise buildings at earthquake, it is common to install response control devises such as oil dampers in a building; however, the effect of the damper to reduce vibration of a building is limited. To increase the effect of the damper, this paper proposes the seismic control structure using block and tackle system. Also, to examine the possibility of practical application and performance of the system, a shaking table test was conducted for a frame with the proposed block and tackle system.%棟頂部に設置したダンパーを増幅させる制振機構を有する建物の縮小模型による振動実験と解析を行い，動滑車ダンパーの効果について検証し，以下の結果を得た.1)本実験においては，相対変位と絶対速度の低減に効果を発揮したが，加速度は低減できない場合もあった.