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Proposition of Improved Semi-Analytical Relationship considering Response Characteristics of Buried Pipeline

지중매설관로의 거동특성을 반영한 개선된 해석적 관계식의 제안

  • 김태욱 (한국철도기술연구원 궤도·구조 연구그룹) ;
  • 임윤묵 (연세대학교 공과대학 사회환경·시스템공학부 토목전공) ;
  • 김문겸 (연세대학교 공과대학 사회환경·시스템공학부 토목전공)
  • Published : 2003.10.01

Abstract

Response analysis of buried pipeline subjected to permanent ground deformation(PGD) due to liquefaction is mainly executed by use of numerical analysis or semi-analytical relationship, Especially for the semi-analytical relationship considering transverse PGD, it has somewhat limited applicability : since it has different formula according to the width of PGD and does not reflect various patterns of PGD which is caused by the decrease of soil stiffness, Therefore, in this study, the applicability of existing analytical relationship is closely investigated through the comparison of FEM results at first. And then, based on meaningful contemplation, improved analytical relationship is proposed. The proposed one models the system behavior of buried pipeline as the combination of cable and beam, and thus it is applicable to arbitrary width of PGD, Moreover, it does reflect various patterns of PGD by introducing interaction pattern coefficient. Through the comparison of numerical results using the FEM and the proposed analytical relationship, rational applicability is objectively verified and noticeable considerations are discussed, Moreover, analyses considering the change of PGD magnitude and patterns are performed.

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