도로 하부 통과 배관의 주행 하중 속도에 따른 진동 특성

초록

Vibration velocity induced by earthquakes or external vibration sources is one of the integrity assessment indexes, and is also a representative value used to describe the amount of vibration because it is based on a proportional relationship with the damage scale. In this study, the vibration velocity criterion for structures is first examined. Then, based on the velocity criterion, an integrity assessment is performed. Burial condition is set up based on the “Highway and Local Road Design Criteria” with API 5L Gr. X65 pipeline (D = 762 mm). The FE model considers DB-24 vehicle load as a time function with a varying velocity in the range of 20~160 km/h. Maximum vibration velocity occurs at v = 80 km/h and decreases after v = 80 km/h. The maximum vibration velocity of buried pipeline by DB-24 loads is about 0.034 츠/s. The velocity that occurs is in the range of allowable values for each vibration velocity criterion. The wave propagation velocity was identified based on attenuation law and the minimum value appears at vehicle velocity 80 km/h that has maximum vibration velocity.

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