Site Dependent Fragility Curves of Simply-Supported PCI Girder Bridge

建立考慮地盤分類之簡支預力梁易損曲線

陳冠雄(Kuan-Hsoung Chen) ； 劉東豪(Tung-Hao Liu) ； 羅俊雄(Chin-Hsiung Loh)

《中華技術學院學報》 39期 (2008/12) Pp. 199-220

https://doi.org/10.7095/JCIT.200812.0199

摘要

本研究之目的在於考量地盤分類之PCI橋梁易損曲線。在台灣的第一高速公路主要為簡支PCI橋梁為主；本研究考慮不同橋柱型式、設計規範、及測站的土層變異性質，採用921及331地震力做為非線性歷時反應分析。並探討橋柱不同的圍束鋼筋量之易損性質。
地震力輸入資料採用921集集地震、331花蓮地震及1994年北嶺地震。考量測站之震央距、近斷層地震及堅實、普通、軟弱和台北盆地之地盤條件。
本研究採用非線性歷時分析建立PCI橋梁之易損曲線。Park-Ang破壞指數應用在分類不同的破壞程度以及分別對應於PCI橋梁之易損曲線。分析結果將與實際統計數據做比較；比較將發現本研究能具體反映實際統計之結果。分析成果再進一步探討PGA、Sa、Sd及Sv之關聯性。本研究之成果可提供於TELES做為資料庫上之應用。

關鍵字

PCI橋梁 ； Park-Ang破壞指數 ； 易損曲線 ； 非線性歷時分析

並列摘要

The aim of this research is to develop the fragility curves of a PCI girder bridge with the consideration of various site conditions. Two simply-supported two-span PCI Girder Bridges which are commonly employed in Taiwan, with a hammerhead pier and a multi-column bent, respectively, are adopted here in this research. Two different types of design codes, conventional and seismic design of Taiwan, are used to consider the variability of the bridge fragility curves with different design code. Based on the nonlinear time history response analysis of the PCI girder bridge, damage index is calculated with respect to different intensity measure and different site conditions. Finally, the site-dependent fragility curves for four damage states are generated. Comparison of the developed fragility curves with the other researchers is made.

並列關鍵字

PCI girder ； Park-Ang damage index ； Loss-span index ； Site soil condition ； Nonlinear time history analysis