SEISMIC PERFORMANCE EVALUATION OF REINFORCED WOODEN TEMPLE BASED ON LONG TERM EARTHQUAKE OBSERVATIONS

The seismic performance of structures is known to change over time, and the causes are affected by the surrounding environment such as temperature and humidity as well as damage caused by disturbances such as earthquakes. In terms of structure, seismic performance has been evaluated based on the construction age, mainly the transition of related laws and regulations, but the seismic performance changes over time, considering the material properties that swell and shrink sensitively due to temperature and humidity. the purpose of this study is to quantitatively evaluate the effects of various influential factors using earthquake observation records which are measured over a long period of time at the main hall of wooden temple. The subspace method was applied to the observation record of target temple, and the transition of the natural frequency due to aging was verified as the environment was changed. As a result of the investigation, the natural frequency changed as the temperature up and down, suggesting the effect of swell and shrink of the joint. Further, in the deformation range about less 3 mm, the variation in the natural frequency may have the same effect as the nonlinearity due to the large and small response.