寺院建築の耐震診断と耐震改修事例

概要

論文の詳細を見る
Structural style of Japanese temples is unique and different in wooden structural system to than dwelling houses. The purpose of this research is to clarify the seismic performance of a Japanese temple that stand at Fujieda city by means of field investigation, seismic diagnosis and seismic retrofit. From the viewpoint of seismic performance, the weakness of this temple is mainly based on the heavy weight of the roof, the deficiency of resistant wall and the weak rigidity of ceiling plane. In order to improve the seismic performance, we replaced heavy tiles with light ones on the roof, strengthened walls by using studs, sleepers and plywoods at outer zone and installed steel braces in ceiling plane refering to the seismic diagnosis. In order to confirm the effect of seismic retrofit, we carried out the microtremor measurements before and after the seismic retrofit. The main results which were confirmed by microtremor measurements are as follows; The natural frequency of this temple has increased from 2.0Hz to 3.6Hz. The damping constant has decreased from 3.5 % to 2.7 %. The torsional vibration has been reduced. Therefore, it becomes clear that the seismic diagnosis and seismic retrofit mentioned above are very effective in this case.
社団法人日本建築学会の論文
2005-07-30