地震動の継続時間が送電用鉄塔の応答に及ぼす影響に関する検討  [in Japanese] EFFECTS OF EARTHQUAKE DURATION ON RESPONSE OF AN OVERHEAD TRANSMISSION LINE  [in Japanese]

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Abstract

本論文では,地震動のスペクトル特性に着目して,地震動の継続時間が送電用鉄塔の応答に及ぼす影響について非線形地震応答解析により検討した.解析では,高さ77.5mの送電用鉄塔を対象として,3基4径間の鉄塔-架渉線連成系モデルを作成し,スペクトル特性や継続時間の異なる3種類の地震動による非線形地震応答解析を実施した.地震動の継続時間が有する特性としては,繰り返し数と長周期成分の2つの側面に着目した.解析の結果,鉄塔応答への影響はほとんど見られなかったが,地震動の長周期成分の影響により,電線応答が増幅される傾向が見られた.

 This paper discussed effects of earthquake duration on responses of an overhead transmission line. For this purpose, nonlinear analyses were conducted. An analysis target was the overhead transmission line which has three towers with 77.5m in height and four spans whose length between each towers were equal to 450m, reapectively. Three types of ground accelerations were selected as analysis inputs in order to investigate effects of earthquake duration. A number of cycles and a long period component were focused as the characteristics of earthquake duration. Analytical results demonstrated that the long period component of the earthquake increased the maxmim displacement of cables while tower responses were not affected by the earthquake duration.

Journal

  • Journal of Japan Society of Civil Engineers, Ser. A1 (Structural Engineering & Earthquake Engineering (SE/EE))

    Journal of Japan Society of Civil Engineers, Ser. A1 (Structural Engineering & Earthquake Engineering (SE/EE)) 69(4), I_396-I_404, 2013

    Japan Society of Civil Engineers

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