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The Gyeongju and Pohang earthquakes caused damages to many cultural properties; particularly, stone pagoda structures were significantly damaged among masonry cultural properties. To preserve these structures, it is necessary to understand their dynamic behavior characteristics under earthquakes. Analyses on such areas as deformation, frequency, maximum acceleration, permanent displacement, sliding, and rocking have to be performed. Although many analytical studies have already been conducted, dynamic behavior studies based on experiments are insufficient. Therefore, this study analyzed dynamic behavior characteristics by performing a shaking table experiment on a three-story stone pagoda structure at the Cheollongsa temple site damaged by the Gyeongju earthquake. As a result of the experiment, the displacements of stylobates did not occur significantly, but the tower body parts rotated. In particular, the rotation of the 1F main body stone was relatively larger than that of the other chief body stones because the 1F main body stone is relatively more slender than the other parts. In addition, the decorative top was identified as the component most vulnerable to sliding. This study found that the 1F main body stone is vulnerable to rocking, and the parts located on the upper part are more vulnerable to sliding.
1. 서 론
2. 천룡사지 삼층석탑의 지진피해
2.1 현황 및 개요
2.2 지진피해 현황
3. 동적거동 실험
3.1 축소모델 제작
3.2 실험방안
3.3 입력지진파
4. 동적실험 결과분석
4.1 변형 분석
4.2 고유진동수 분석
4.3 최대가속도 분석
4.4 영구변위 분석
4.5 미끄러짐(Sliding) 분석
4.6 전도모멘트에 의한 Rocking 현상 분석
5. 결 론
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