常時微動計測による低層住宅の1次固有振動数低下率の変形依存性評価: 在来木造、軽量鉄骨造および伝統木造について

摘要

The object of this study is to estimate the maximum deformation angle experienced of low-rise house after an earthquake by using microtremor measurement. As an exanple of low-rise houses, consideration was given to Japanese conventional wooden structure, tradititmal wooden structure, and light-gauge steel structure. First, by the shaking table test of conventional wooden structure, the relationship between the natural frequency of microtremor measurement and the maximum deformation angle experienced is considered. Second, the formula of the relationship between the natural frequency of microtremor measurement and maximum deformation angle, which contain traditional wooden structure and light-gauge steel one, is proposed.%本論文では、常時微動計測による低層住宅の被災度評価を目的とし、在来木造および軽量鉄骨造を対象とし、振動台実験により1次固有振動数の低下率f_m/f_0(ただし、f_0：初期1次固有振動数、f_m ：加振（地震）後の1次固有振動数）の最大変形角γ_(max)依存性評価式を新たに構築した。そして、既往の伝統木造に関する評価式も含めて比較検討することで、以下の知見を得た。