两种残余变形模型计算结果对比分析
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摘要
为研究修正的沈珠江残余变形模型和双曲线残余变形模型的异同及其在实际工程中适应性,在同一条件下开展了面板坝二维有限元计算,对残余应变和坝体永久变形进行分析。研究结果表明:1强震荷载作用下两个模型计算结果总体规律一致。2考虑平均主应力影响的双曲线模型能更好地反映坝顶及其附近的残余变形规律。3残余体应变在双曲线模型中对永久位移值的贡献要小于其在修正沈珠江模型中的贡献。残余体应变对面板坝永久变形的影响要小于残余剪应变。
A two- dimensional finite element analysis of CFRD is carried out to study the residual deformation and permanent deformation under the same condition by using modified Shenzhujiang residual deformation model and hyperbolic residual deformation model respectively to explore their differences and the applicability in practical calculations. The results show that:(1) the general principles of the two models are identical under the strong earthquake load;(2) the residual deformation at the dam crest and the nearby region simulated by the hyperbolic model is more precise because the mean principle stress is taken into account;(3) the contribution of the residual volumetric strain to the permanent displacement in the hyperbolic model is relatively lower than that in Shenzhujiang Model; the influence of the residual volumetric strain on the permanent deformation is lower than that of the residual shear strain.
A two- dimensional finite element analysis of CFRD is carried out to study the residual deformation and permanent deformation under the same condition by using modified Shenzhujiang residual deformation model and hyperbolic residual deformation model respectively to explore their differences and the applicability in practical calculations. The results show that:(1) the general principles of the two models are identical under the strong earthquake load;(2) the residual deformation at the dam crest and the nearby region simulated by the hyperbolic model is more precise because the mean principle stress is taken into account;(3) the contribution of the residual volumetric strain to the permanent displacement in the hyperbolic model is relatively lower than that in Shenzhujiang Model; the influence of the residual volumetric strain on the permanent deformation is lower than that of the residual shear strain.
引文
[1]王昆耀,常亚屏,陈宁.往返荷载下粗粒土的残余变形特性[J].土木工程学报,2000,33(3):48-53.
[2]周扬.汶川地震紫坪铺面板堆石坝震害分析及面板抗震对策研究[D].大连:大连理工大学,2012.
[3]迟世春,林皋,孔宪京,等.堆石料残余体应变对计算面板堆石坝永久变形的影响[J].水力发电学报,1998,60(1):59-67.
[4]贾革续,孔宪京.粗粒土动残余变形特性的试验研究[J].岩土工程学报,2004,26(1):26-30.
[5]沈珠江,徐刚.堆石料的动力变形特性[J].水利水运科学研究,1996,6(2):143-150.
[6]邹德高,孟凡伟,孔宪京,等.堆石料的残余变形特性研究[J].岩土工程学报,2008,30(6):808-812.
[7]邹德高,毕静,徐斌,等.加筋砂砾料残余变形特性研究[J].水力发电学报,2009,28(5):158-162.
[8]刘汉龙,林永亮,凌华,等.加筋堆石料的动残余变形特性试验研究[J].岩土工程学报,2010,32(9):1418-1421.
[9]殷宗泽.土工原理[M].北京:中国水利水电出版社,2007.
[10]邹德高,孔宪京.Geotechnical dynamic nonlinear analysis-GEODYNA使用说明[R].大连:大连理工大学土木水利学院工程抗震研究所,2003.
[11]凌华,傅华,蔡正银,等.坝料动残余变形特性试验[J].河海大学学报:自然科学版,2010,38(5):532-537.
[12]王玉赞,迟世春,邵磊,等.堆石料残余变形特性与参数敏感性分析[J].岩土力学,2013,34(3):856-862.
[13]孔宪京,邹德高,周扬,等.汶川地震中紫坪铺混凝土面板堆石坝震害分析[J].大连理工大学学报,2009,49(5):668-674.
[14]刘振平,迟世春.汶川地震中紫坪铺面板堆石坝永久应变反演分析[J].岩土工程学报,2013,35(9):1659-1665.
[2]周扬.汶川地震紫坪铺面板堆石坝震害分析及面板抗震对策研究[D].大连:大连理工大学,2012.
[3]迟世春,林皋,孔宪京,等.堆石料残余体应变对计算面板堆石坝永久变形的影响[J].水力发电学报,1998,60(1):59-67.
[4]贾革续,孔宪京.粗粒土动残余变形特性的试验研究[J].岩土工程学报,2004,26(1):26-30.
[5]沈珠江,徐刚.堆石料的动力变形特性[J].水利水运科学研究,1996,6(2):143-150.
[6]邹德高,孟凡伟,孔宪京,等.堆石料的残余变形特性研究[J].岩土工程学报,2008,30(6):808-812.
[7]邹德高,毕静,徐斌,等.加筋砂砾料残余变形特性研究[J].水力发电学报,2009,28(5):158-162.
[8]刘汉龙,林永亮,凌华,等.加筋堆石料的动残余变形特性试验研究[J].岩土工程学报,2010,32(9):1418-1421.
[9]殷宗泽.土工原理[M].北京:中国水利水电出版社,2007.
[10]邹德高,孔宪京.Geotechnical dynamic nonlinear analysis-GEODYNA使用说明[R].大连:大连理工大学土木水利学院工程抗震研究所,2003.
[11]凌华,傅华,蔡正银,等.坝料动残余变形特性试验[J].河海大学学报:自然科学版,2010,38(5):532-537.
[12]王玉赞,迟世春,邵磊,等.堆石料残余变形特性与参数敏感性分析[J].岩土力学,2013,34(3):856-862.
[13]孔宪京,邹德高,周扬,等.汶川地震中紫坪铺混凝土面板堆石坝震害分析[J].大连理工大学学报,2009,49(5):668-674.
[14]刘振平,迟世春.汶川地震中紫坪铺面板堆石坝永久应变反演分析[J].岩土工程学报,2013,35(9):1659-1665.
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