지중매설관로의 거동특성을 반영한 개선된 해석적 관계식의 제안

초록

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

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