동적재하시험을 통한 PSC 거더교의 횡분배 측정
Lateral Load Distribution Estimation of a PSC Girder Bridge fromDynamic Loading Test
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초록
교량은 사회간접시설물의 핵심이 되는 도로의 주요 시설물이므로 공용기간 동안 안정성과 사용성이 확보될 수 있도록 건설되며,교량의 안전성 확보를 위하여 현재 상태에서 건전성을 평가하는 것은 유지관리 업무에서 중요한 과제이다. 일반적으로 교량의 내하력 평가를위해 차량재하시험을 통하여 횡분배윺을 측정함으로써 교량의 중첩거동 및 대칭거동을 확인할 수 있다. 그러나 공용중인 교량의 횡분배율을측정하기 위하여 정적재하시험을 수행하고 있으며 교통통제의 어려움이 있다. 따라서 본 연구에서는 동적재하시험 및 상시진동시험에서 측정된 교량의 변위응답 데이터를 경험적 모드분해기법을 이용하여 정적 성분의 변위를 추출하였다. 추출된 정적 성분의 변위를 이용하여 횡분배율을 추정하였으며, 정적재하시험에서 측정된 횡분배율과 비교하였다.
Abstract
Since the bridge is the main facility of the road that is the core of the civil infrastructure, the bridge is constructed to ensure stability andserviceability during the traffic use. In order to secure the safety of bridges, evaluating the integrity of bridges at present is an important task in themaintenance work of bridges. In general, to evaluate the load carrying capacity of bridges, it is possible to confirm the superimposed behavior andsymmetric behavior of bridges by estimating the lateral load distribution factor of the bridges through vehicle loading tests. However, in order to measurethe lateral load distribution factor of a commonly used bridge, a static loading test is performed. There is a difficulty in traffic control. Therefore, inthis study, the static displacement component of the bridge measured in the dynamic loading test and the ambient vibration test was extracted byusing empirical mode decomposition technique. The lateral load distribution was estimated using the extracted static displacement component andcompared with the lateral load distribution factor measured in the static loading test.
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