This study analyzed displacement records of Sungnyemun Gate's primary structural members, such as columns, beams, and hip rafters, over approximately ten years from 2013 to 2023. Through this, we attempted to examine the behavior of wooden architectural heritage in detail and infer the factors influencing structural change through the deformation revealed during the displacement accumulation process. As a result of the analysis, it was quantitatively confirmed that the prominent structural members of the Sungnyemun gate, including the columns, beams, and hip rafters, continued to move and that the accumulated displacements from the movement led to the structure's deformation. It was also confirmed that member displacements accumulate in a specific direction. In the case of the Sungnyemun gate, even after the structure was stabilized, the columns were tilting inward toward the building, and the ends of the hip rafters and the centers of the beams were moving downward continuously. Furthermore, the behavior of wooden architectural heritage, in which damage accumulates as it undergoes repeated transformation and recovery according to seasonal changes, was also revealed in detail. The deformation of the Sungnyemun gate members shows a common pattern of relatively large behavior in the summer. However, seasonal deformation did not appear the same in all members. Even the same member has an uneven drying speed due to differences in the amount of sunlight received depending on the location, leading to uneven distribution of deformation. This study, while acknowledging its limitations, is significant in that it attempts to examine the behavior of our wooden architectural heritage in detail and discuss its characteristics and influencing factors based on quantitative results of long-term measurements.

ABSTRACT
1. 서 론
2. 숭례문 구조 변위 모니터링
3. 계측 결과 및 거동 양상
    3-1. 변위량 계측 및 기록 방법
    3-2. 상층 기둥 거동 특성
    3-3. 창방 및 추녀 거동 특성
4. 숭례문 문루 구조 거동 영향요인
    4-1. 구조 변형 현황
    4-2. 구조체 안정화 과정의 영향
    4-3. 전통 목조건축 시공기술의 영향
    4-4. 계절 변화에 따른 기후의 영향
    4-5. 일조량의 영향
5. 결 론
참고문헌

• 서효원(국립문화유산연구원 학예연구사) | Seo Hyowon Corresponding author
• 김성한(국립문화유산연구원 연구원) | Kim Sunghan
• 이하나(국립문화유산연구원 연구원) | Lee Hana