SEISMIC RESPONSE ANALYSIS OF CONCRETE-FILLED STEEL BOX PIERS CONSIDERED ON LOCAL BUCKLING

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  • コンクリートを充填した角形鋼管柱の局部座屈を考慮した地震応答解析
  • コンクリート オ ジュウテン シタ カクガタ コウカン チュウ ノ キョクブザクツ オ コウリョ シタ ジシン オウトウ カイセキ

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Abstract

The local buckling behavior of a stiffened box member filled with the inner concrete was analyzed by FEM. Obtained average stress versus average strain relationship are described explicitly as a function of a width-to-thickness parameter of stiffened plates. Average stress versus average strain relationship of the inner concrete with confined effect are also described as a function of width-to-thickness ratio of outer steel plates.<br>These stress-strain type hysteresis models are introduced into the user-subroutine of TRAP III and a program for a dynamic analysis of a framed structure composed of a fibered beam element was completed. Seismic response analysis of several bridge pier models are performed by this program and it is shown the numerical results can simulate fairly well the results of the pseudo-dynamic tests carried out at Nagoya University.

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