重力坝地震动水压力试验研究
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摘要
以黄登重力坝为例进行了振动台上坝体—库水系统动力模型试验,测得大坝自振频率和上游面动水压力。将试验结果与附加质量模型及基于欧拉公式的流固耦合有限元模型的计算结果相比较,发现流固耦合结果与试验结果吻合良好,而附加质量法夸大了库水对坝体结构的动力响应。在工程中应用附加质量模型时应对其结果进行折减,并基于坝体体型、坝前水深及高阶振型等因素的分析,给出了沿坝高的动态效应分布系数的推算方法。
Dynamic model test of dam-water system for Huangdeng gravity dam is carried out on a shaking table.The natural frequency and hydrodynamic pressure on upstream are obtained by the test.The results of fluid-solid coupling finite element model based on Euler formula are well consistent with those of the test while the added mass model amplifies the dynamic response of water on the dam.When the added mass model is applied to engineering,its results should be reduced.Based on the analysis of dam shape,water depth and higher mode,it deduces the dynamic effect distribution factor along the dam height.
Dynamic model test of dam-water system for Huangdeng gravity dam is carried out on a shaking table.The natural frequency and hydrodynamic pressure on upstream are obtained by the test.The results of fluid-solid coupling finite element model based on Euler formula are well consistent with those of the test while the added mass model amplifies the dynamic response of water on the dam.When the added mass model is applied to engineering,its results should be reduced.Based on the analysis of dam shape,water depth and higher mode,it deduces the dynamic effect distribution factor along the dam height.
引文
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[2]中国水利水电科学研究院,电力工业部昆明勘测设计研究院,电力工业部西北勘测设计研究院,等.水工建筑物抗震设计规范(DL5073-2000)[S].北京:中国水利水电出版社,2000.
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[6]高瑞强,宫必宁,郭建平.坝—水相互作用中水的压缩性影响研究[J].水利与建筑工程学报,2008,6(1):106-108.
[7]王进廷.高混凝土坝—可压缩库水—淤砂—地基系统地震反应分析研究[D].北京:中国水利水电科学研究院,2001.
[8]杜建国.基于SBFEM的大坝—库水—地基动力相互作用分析[D].大连:大连理工大学,2007.
[9]Du X L,Wang J T,Hung T K.Effects of Sedimenton the Dynamic Pressure of Water and Sediment onDams[J].Chinese Science Bulletin,2001,46(6):521-524.
[10]居荣初,曾心传.弹性结构与液体耦联振动理论[M].北京:地震出版社,1983.
[11]宫必宁.重力坝地震动水压力试验研究[J].河海大学学报,1997,25(1):98-102.
[12]陈厚群,侯顺载,杨大伟.地震条件下拱坝库水相互作用的试验研究[J].水利学报,1989(7):29-39.
[13]李德玉,张伯艳,王海波,等.重力坝坝体—库水相互作用振动台试验研究[J].中国水利水电科学研究院学报,2003,1(3):216-220.
[2]中国水利水电科学研究院,电力工业部昆明勘测设计研究院,电力工业部西北勘测设计研究院,等.水工建筑物抗震设计规范(DL5073-2000)[S].北京:中国水利水电出版社,2000.
[3]杜修力,王进廷.动水压力及其对坝体地震反应影响的研究进展[J].水利学报,2001(7):13-21.
[4]Chopra A K.Hydrodynamic Pressures on Dams duringEarthquakes[J].Journal of Engineering Mechanics,ASCE,1967,93(EM6):205-223.
[5]Fenves G,Chopra A K.Effects of Reservoir BottomAbsorption and Dam-water-foundation Rock Inter-action on Frequency Response Functions for Con-crete Gravity Dams[J].Earthquake Engineering&Structural Dynamics,1985,13(1):13-31.
[6]高瑞强,宫必宁,郭建平.坝—水相互作用中水的压缩性影响研究[J].水利与建筑工程学报,2008,6(1):106-108.
[7]王进廷.高混凝土坝—可压缩库水—淤砂—地基系统地震反应分析研究[D].北京:中国水利水电科学研究院,2001.
[8]杜建国.基于SBFEM的大坝—库水—地基动力相互作用分析[D].大连:大连理工大学,2007.
[9]Du X L,Wang J T,Hung T K.Effects of Sedimenton the Dynamic Pressure of Water and Sediment onDams[J].Chinese Science Bulletin,2001,46(6):521-524.
[10]居荣初,曾心传.弹性结构与液体耦联振动理论[M].北京:地震出版社,1983.
[11]宫必宁.重力坝地震动水压力试验研究[J].河海大学学报,1997,25(1):98-102.
[12]陈厚群,侯顺载,杨大伟.地震条件下拱坝库水相互作用的试验研究[J].水利学报,1989(7):29-39.
[13]李德玉,张伯艳,王海波,等.重力坝坝体—库水相互作用振动台试验研究[J].中国水利水电科学研究院学报,2003,1(3):216-220.
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