观音岩水坝地震动力分析
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摘要
将有厚度接触摩擦单元引入具有观音岩混合坝接头的堆石体与混凝土坝段之间的接触面进行力学模拟.在堆石及心墙料的静力本构关系上采用Ducan双曲线E-B模型模拟堆石坝的实际填筑施工和水库蓄水过程,并采用非线性动力分析方法对大坝连接坝段进行三维地震动力分析,揭示了插入式接头坝段采用在竣工期和运行期的接触面的应力情况和脱开情况.对心墙料与混凝土的接触面采用动力接触薄层单元进行模拟,真实地反映了地震过程中接触面的剪切及开合变形情况.根据动力分析成果,对大坝软接头的抗震性能及抗震安全性进行评价.
There will be contacts with the thickness of friction Guanyinyan the introduction of a mixed unit of joint dam with concrete rockfill dam section for contact between the mechanical simulation,and the rock core material of the static constitutive Ducan using a hyperbolic model E-B The actual rock-fill dam construction and reservoir filling process based on nonlinear dynamic analysis of the section of the dam to connect power to conduct three-dimensional seismic analysis revealed the use of plug-in connector section in the completion and operation of The period of contact stress and was torn off and analyzed.We use thin-layer access to power unit to carry out simulation core material contact with the concrete surface in order to truly reflect the earthquake in the process of contacts and the opening and closing of the shear deformation.According to the results of dynamic analysis,we evaluate the dam of the soft joint seismic performance and seismic safety evaluation.
There will be contacts with the thickness of friction Guanyinyan the introduction of a mixed unit of joint dam with concrete rockfill dam section for contact between the mechanical simulation,and the rock core material of the static constitutive Ducan using a hyperbolic model E-B The actual rock-fill dam construction and reservoir filling process based on nonlinear dynamic analysis of the section of the dam to connect power to conduct three-dimensional seismic analysis revealed the use of plug-in connector section in the completion and operation of The period of contact stress and was torn off and analyzed.We use thin-layer access to power unit to carry out simulation core material contact with the concrete surface in order to truly reflect the earthquake in the process of contacts and the opening and closing of the shear deformation.According to the results of dynamic analysis,we evaluate the dam of the soft joint seismic performance and seismic safety evaluation.
引文
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[8]赵剑明,汪闻韶,常亚屏,等.高面板坝三维真非线性地震反应分析方法及模型试验验证[J].水利学报,2003(9):12-18.
[9]张锐,迟世春.高土石坝地震动态分布系数研究[J].水力水电,2005,31(8):30-31,41.
[2]沈振中,徐志英.V形河谷中非均匀土石坝振动的简化分析[J].水利水电,2002(3):74-79.
[3]顾淦臣.土石坝地震工程[M].南京:河海大学出版社,1989:234-236.
[4]杜成斌,苏擎柱.混凝土材料动力本构模型研究进展[J].世界地震工程,2001,18(2):94-98.
[5]李小军,廖振鹏,张克绪.土体动力本构模型评述[J].世界地震工程,1993,9(4):15-18.
[6]赵剑明,常亚屏,陈宁.龙首二级面板堆石坝三维真非线性地震反应分析和评价[J].岩土力学,2004,(z2):388-392,396.
[7]吴兴征,栾茂天,李相菘.复杂加载路径下堆石料动力本构模型及数值模拟[J].世界地震工程,2001,17(1):9-14.
[8]赵剑明,汪闻韶,常亚屏,等.高面板坝三维真非线性地震反应分析方法及模型试验验证[J].水利学报,2003(9):12-18.
[9]张锐,迟世春.高土石坝地震动态分布系数研究[J].水力水电,2005,31(8):30-31,41.
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