基于不同本构模型的拱坝地震响应分析

英文篇名：Seismic Responses Analysis on Arch Dam Based on Different Constitutive Models
中文刊名：水力发电
英文刊名：Water Power
作者：韦先锋 ; 彭刚 ; 姚艳华
英文作者：Wei Xianfeng ; Peng Gang ; Yao Yanhua(College of Civil and Construction Engineering ; China There Gorges University ; Yichang Hubei 443002)
中文关键词：拱坝 ; 线弹性本构 ; D-P本构 ; 损伤塑性本构 ; 地震动响应
英文关键词：arch dam ; linear elastic constitutive ; Drucker-Prager constitutive ; damage plastic constitutive ; dynamic seismic response
出版日期：2010-04-12
机构：三峡大学土木与建筑学院;
年：2010
期：04
出版单位：水力发电

摘要

基于线弹性本构、D-P本构和ABAQUS中的损伤塑性本构,对某拱坝进行动力响应对比分析。结果表明:在正常蓄水位下,采用损伤塑性本构时坝体的顺河向位移峰值最大、D-P本构次之、线弹性本构最小,且采用损伤塑性本构时坝体的顺河向位移响应最大值有滞后现象;采用损伤塑性本构坝体的应力峰值较其他两种本构坝体的应力峰值小,考虑材料的非线性后,应力值较线弹性本构和D-P本构更符合材料的实际承载能力;上游面的坝踵部位和下游面的两侧坝肩部位出现了不同程度的损伤,应加强这些部位的安全防护。
The dynamic responses of arch dam were studied respectively by using the linear elastic constitutive,Drucker-Prager constitutive and damage plastic constitutive models.Under the normal water level,the peak displacement along stream direction calculated with the damage plastic constitutive model is biggest,and is smallest for linear elastic constitutive model.The response time of the maximum displacement along stream direction under the damage plastic constitutive model is slower than other two models.The peak stress of dam under the damage plastic constitutive model is smallest,and is more in line with the actual carrying capacity of the material after considering the nonlinearity of material.The studies also show that the upstream dam heel and downstream abutments are damaged and should be strengthened for security.

引文

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