2604 ダンパーブレースとシートパイル基礎を用いた鉄道高架橋の耐震性能向上策に関する検討(地震・耐震性評価・対策,SS7:安全と防災,第18回交通・物流部門大会(TRANSLOG2009))

概要

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Previous study said that reducing displacement response of railway viaduct is quiet effective to secure train-running safety during seismicity. In this paper, we evaluated seismic upgrading effects of damper-brace and sheet-pile foundation on railway viaduct by conducting pushover analyses and dynamic analyses for 3 types analysis model; model A non-retrofitted, model B retrofitted by Y-brace and model C retrofitted by upside-down Y-brace. The results indicate that the model C retrofitted by upside-down Y-brace gives the best effects of seismic upgrading for railway viaduct and train-running safety during seismicity, considering the displacement response and displace resultant of railway viaduct.
2009-12-02