HYDRODYNAMIC ANALYSIS AND ASSESSMENT FOR TSUNAMI-RESISTANCE OF REINFORCED CONCRETE BUILDINGS

鋼筋混凝土建築物抵抗海嘯能力之水動力分析及評估流程

Wen-Cheng Shen(沈文成) ； Meng-Huang Gu(古孟晃) ； Pu-Wen Weng(翁樸文) ； Fu-Pei Hsiao(蕭輔沛) ； Chia-Chen Lin(林佳蓁)

《中國土木水利工程學刊》 35卷1期 (2023/03) Pp. 49-60

https://doi.org/10.6652/JoCICHE.202303_35(1).0006

摘要

If the strong earthquake occurs in the ocean, it may trigger the hazardous tsunami and then savagely attack coastlines, causing huge property damage and loss of life. Like Japan, Taiwan is regularly hit by earthquakes because it is located on the circum-Pacific seismic belt. Once the tsunami event occurs, the low-lying coastal areas will bear the brunt of the tsunami impact, the risk of tsunami is underestimated. It is necessary to pay more attention to reduce the tsunami disaster. In this study, the parameters were considered using conduct hydraulic routing to estimate the hydraulic stress of the reinforced concrete building which refers to the FEMA P646 design guideline. Also, the dam failure simulation is used to verify accuracy of the numerical model. Finally, the Yapu Trench was selected as the tsunami source, and a hypothetical building was used to evaluate the dynamic effect after being hit by a tsunami. After comparison, the results of hydraulic analysis are much smaller than the FEMA P646 recommended values.

關鍵字

tsunami ； reinforced concrete building ； hydrodynamic analysis ； tsunami-resistance assessment

並列摘要

當強烈地震發生於海底，極有可能引發危害性海嘯，對於沿海區域之人民造成生命與財產之威脅與傷害。臺灣與日本同樣屬於海島型國家，且位處環太平洋地震帶，經常受到地震之侵襲，一旦發生海嘯災害，臨海地勢較為平坦或低窪之區域將首當其衝，其風險不容小覷，應及早做好海嘯防範之準備。本研究參考美國FEMA P646設計指南，利用溢淹高度、流速及通量等海嘯參數進行水理分析，估算海嘯侵襲時，對於建築結構之受力狀況，並以潰壩模擬驗證數值模型之正確性。最後，選定亞普海溝為海嘯源，以一假定建築結構探討承受海嘯侵襲後之影響，經過比較，水理分析結果均遠小於設計指南之建議值，顯見其保守程度。

並列關鍵字

海嘯 ； 鋼筋混凝土建築 ； 水動力分析 ； 抗海嘯評估

參考文獻

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