沉箱式碼頭動態模型試驗之規劃與數值模擬

Design and Numerical Analysis for Dynamic Model Test of Caisson Type Quay Walls

張文忠(Wen-Jong Chang) ； 陳志芳(Jyh-Fang Chen) ； 盧又彥(Yu-Yen Lu)

《海洋工程學刊》 14卷4期 (2014/12) Pp. 253-267

https://doi.org/10.6266/JCOE.2014.1404.04

摘要

本研究以非線性動態有效應力數值模擬分析，做為沉箱式碼頭震動台液化模型試驗之模型設計與試驗規劃依據，並以實體模型試驗結果進行數值模擬之初步驗證，探討沉箱式碼頭之破壞模式、超額孔隙水壓分布及介面土壓力分布，並比較沉箱底部礫石層對沉箱模型耐震能力及破壞模式之影響。實體模型試驗結果與數值模擬定性相符，顯示以動態數值模擬可得到合理之位移變形量推估，且沉箱底部礫石層可有效降低永久位移與傾斜變形，而作用於沉箱後方之土壓力分布亦受底部礫石基底之影響。

關鍵字

沉箱式碼頭 ； 動態數值模擬 ； 土壤─結構互制 ； 震動台模型試驗 ； 土壤液化

並列摘要

Dynamic, nonlinear effective stress based numerical analyses of caisson type quay wall are performed to determine the design details of dynamic physical model tests for study of the failure modes of caisson, spatial variations of excess pore water pressure, distribution of earth pressure along the soil-structure interfaces, and the effects of the rubble base. The general agreements of the results between the physical model tests and the priortesting numerical simulations show that the numerical technique is an effective tool to evaluate the deformation of caisson type quay walls subjected to seismic loadings. In addition, the rubble base can reduce the permanent deformations of caissons and change the lateral earth pressure distribution.

並列關鍵字

caisson type quay walls ； dynamic numerical simulation ； soil-structure interaction ； shaking table model test ； soil liquefaction