三维一致黏弹性人工边界在城市防洪工程抗震分析中的应用  

Application of 3D Consistent Viscous-spring Artificial Boundary to Seismic Analysis of Urban Flood-control Project

作　　者：杨洋[1,2] 刘国明[1] 江月霞 刘伟民 

机构地区：[1]福州大学土木工程学院,福州350108 [2]重庆市弘禹水利咨询有限公司,重庆301147 [3]福建省漳州市水利局,福建漳州363000

出　　处：《中国农村水利水电》2010年第5期105-108,共4页China Rural Water and Hydropower

基　　金：福建省自然科学基金计划项目(2008J0154);福建省科技三项费用资助项目(2006F0507010091)

摘　　要：结合福州市闽江防洪工程,将三维一致黏弹性人工边界及其等效单元应用于该防洪堤及地基的非线性动力分析中,采用El-Centro地震加速度记录作为激励,通过数值计算讨论了不同地基边界条件对防洪堤地震响应的影响。计算结果表明,考虑地基辐射阻尼的影响后,防洪堤的动力响应较固定边界无质量地基情况明显减弱,地基土体的液化范围明显减小并与试验结果吻合良好,计算精度进一步提高。研究成果可为类似工程的抗震分析提供参考。Based on a flood control project in Fuzhou City,3D consistent viscous spring artificial boundary and equivalent elements are applied to a nonlinear dynamic analysis of the dike and foundation.Acceleration records of El-Centro earthquake are used as the input wave,the effect degree concerning embankment dynamic response is evaluated under different boundary conditions.Calculation results show that compared to massless foundation with fixed boundary,the dynamic response of the dike and the liquefaction area of the foundation decreases obviously based on 3D consistent viscous spring artificial boundary.The results are in good agreement with the test and the precision is higher.Results derived from this paper serve as a reference for seismic analysis of similar projects.

关 键 词：动力响应 堤防工程 粘弹性人工边界 等效单元 液化 

分 类 号：TV871[水利工程—水利水电工程]