基于ABAQUS的路堤地震动力响应分析
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摘要
路堑路堤是我国西部山区常见的路基形式。该文结合工程实例,采用有限元数值分析软件ABAQUS对位于国道213DK732+560处坡度分别为1:1.5和1:1.75的半挖半填路堤进行了分析。本文首先选取5.12汶川地震中卧龙台站所记录的加速度时程,将有限元分析结果与Newmark法计算结果进行比较发现,对于坡度为1:1.5和1:1.75的路堤,有限元数值分析计算出的结果与PGA放大系数为1.25倍的Newmark法计算结果比较吻合,PGA放大系数取1.25倍时有更高的准确度。
Cutting embankment is a common embankment form in China's western mountains.Combined with an engineering example,the article uses the finite element analysis software ABAQUS to analyze the embankment located at National Road 213DK732+560.Firstly,the acceleration time history recorded at the Wolong stations is selected,by comparing the results from the finite element analysis,results show that the PGA amplification 1.25times is equal to and greater.If this coefficient is used to analyze embankments,the reliability of engineering design can be improved.
Cutting embankment is a common embankment form in China's western mountains.Combined with an engineering example,the article uses the finite element analysis software ABAQUS to analyze the embankment located at National Road 213DK732+560.Firstly,the acceleration time history recorded at the Wolong stations is selected,by comparing the results from the finite element analysis,results show that the PGA amplification 1.25times is equal to and greater.If this coefficient is used to analyze embankments,the reliability of engineering design can be improved.
引文
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[2]王振宇,刘晶波.成层地基非线性波动问题人工边界与波动输入研究[J].岩石力学与工程学报,2004,23(7):1169-1173.
[3]赵尚毅,时卫民,郑颖人.边坡稳定性分析的有限儿法[J].地下空间,2001,21(5):450-454.
[4]费康,张建伟.ABAQUS在岩土工程中的应用[M].北京:中国水利水电出版社,2010.
[5]Geo-Slope International Ltd.SLOPE/W for slope stabilityanalysis[M].Versions,User's Guide,Canada,2001.
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