微動計測を用いた既存木造住宅の荷重変形関係推定手法に関する研究

摘要

In this research, new seismic diagnosis method on microtremor observation in addition to seismic diagnosis is proposed. Microtremor observation, man-powered vibration test, motion exciter test (collectively called small-deformation test, or SDT) and shaking table test are examined at three wooden houses over several stages. The appropriateness for the usage of SDT as barometer of stiffness is evaluated from tests on specimen before and after suffering change of situation, for example, weight, aging degradation, shaking, seismic reinforcement. Magnitude correlation among secant stiffness of real-load-deformation relationship, stiffness on seismic diagnosis, skeleton curve of analysis model and stiffness on SDT is determined. It would provide help us establish seismic diagnosis method well reflecting actual condition of building.%本研究の成果と課題は以下のように篇められる。1）試験件の性状が変化する前後において、微動測定及び震動中小加振試験を実施するとともに、大地震波加振による荷重変形関係を参照した結果、前後の振動特性に関して以下が明らかとなった。①建物重量を変化させ、前後の常時微動制定を実施した結果、2階床積載重量を10kN程度の変動させた場合には明瞭な振動特性の変化が現れ、建物重量を良好に評価できた。