THREE DIMENSIONAL DYNAMIC RESPONSE ANALYSIS OF BRIDGE PIERS BY RIGID-BODY-SPRING MODEL

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  • 剛体ばねモデルを用いた橋脚の三次元弾塑性地震応答解析
  • ゴウタイバネ モデル オ モチイタ キョウキャク ノ 3ジゲンダン ソセイ ジシン オウトウ カイセキ

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Abstract

Through an experience of damaged bridge structures during Hyogo-ken Nanbu Earthquake, it is required to clarify an elasto-plastic behavior of a bridge pier subjected to two horizontal directional earthquake motions. From this point of view, in this paper, a three dimensional elasto-plastic dynamic response analysis method of beam-column elements is formulated taking into account an yielding of a pier section due to biaxial bending and torsional behavior. An elasto-plastic dynamic response analysis of a single steel bridge pier and an inverted L-shaped steel bridge pier subjected to a set of two horizontal directional earthquake motions recorded during Hyogo-ken Nanbu Earthquake are conducted by employing above analysis method. And a fundamental behavior of a pier subjected a set of two horizontal directional earthquake motions is investigated by comparing the behavior with that under one horizontal directional earthquake motion.

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