地震研究

以某深厚覆盖层上核电护岸工程为研究对象,介绍了护岸抗震稳定分析的原理和分析方法。采用等价线性法对代表性断面进行有限元动力时程分析,得到SL1和SL2地震动作用下护岸结构的加速度响应、安全系数、液化区分布状况以及震后残余变形。通过分析地基不同土层交界面加速度响应变化来研究深厚覆盖层对加速度峰值的动力放大效应影响。

To further research the influence of deep overburden layer on seismic response and stability of nuclear power revetment,taking a deep overburden nuclear revetment engineering has been introduced based on the principle and analysis method of seismic stability analysis of revetment.The finite element dynamic time history analysis of representative sections is carried out by equivalent linear method.The acceleration response,safety factor,liquefaction zone distribution and post-earthquake residual deformation of SL1 and SL2 are obtained.Based on the analysis of the acceleration response of different soil layers,the influence of deep overburden on the dynamic amplification effect of the acceleration peak is studied.The results have reference value and guiding significance for similar seismic revetment.

引言
1 计算分析方法
2 算例分析
3 结果分析
4 结论

图1 等价线性法计算解析图<br/>Fig.1 Analytical flow chart of the equivalent linear method

图1 等价线性法计算解析图
Fig.1 Analytical flow chart of the equivalent linear method

图2 护岸结构型式和地质断面图
Fig.2 Revetment profile and geological section

图3 护岸结构网格模型<br/>Fig.3 Revetment structure mesh model

图3 护岸结构网格模型
Fig.3 Revetment structure mesh model

表1 邓肯张模型参数<br/>Tab.1 Duncan E-B parameters

表1 邓肯张模型参数
Tab.1 Duncan E-B parameters

表2 海工构筑物动强度指标、动剪切模量系数K和指数n<br/>Tab.2 Marine engineering structure coefficient K and the index of dynamic shear modulus n

表2 海工构筑物动强度指标、动剪切模量系数K和指数n
Tab.2 Marine engineering structure coefficient K and the index of dynamic shear modulus n

表3 海工构筑物地震残余变形计算参数<br/>Tab.3 Marine engineering structure seismic residual deformation calculation parameters

表3 海工构筑物地震残余变形计算参数
Tab.3 Marine engineering structure seismic residual deformation calculation parameters

图4 地震波时程曲线<br/>Fig.4 Time history curve of the seismic wave

图4 地震波时程曲线
Fig.4 Time history curve of the seismic wave

图5 地震加速度响应<br/>Fig.5 Seismic acceleration response

图5 地震加速度响应
Fig.5 Seismic acceleration response

图6 不同高程各点动力响应加速度峰值<br/>Fig.6 Peak acceleration value of dynamic response of different elevation points

图6 不同高程各点动力响应加速度峰值
Fig.6 Peak acceleration value of dynamic response of different elevation points

图7 断面液化区分布<br/>Fig.7 The cross-section of liquefied area distribution

图7 断面液化区分布
Fig.7 The cross-section of liquefied area distribution

图8 断面地震残余变形分布<br/>Fig.8 Distribution of residual deformation in cross-section

图8 断面地震残余变形分布
Fig.8 Distribution of residual deformation in cross-section

图9 断面最危险滑弧<br/>Fig.9 The most dangerous cross-section of the arc

图9 断面最危险滑弧
Fig.9 The most dangerous cross-section of the arc

图10 动力安全系数时程曲线<br/>Fig.10 Time history curve of dynamic safety factor

图10 动力安全系数时程曲线
Fig.10 Time history curve of dynamic safety factor

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备注

引言

1 计算分析方法

2 算例分析

3 结果分析

4 结论

期刊信息