| 弹性波入射时半圆弧凹陷地形对地表位移影响研究 |
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| 引用本文： | 马荣,李永强,景立平,单振东,刘廷峻,汪刚.弹性波入射时半圆弧凹陷地形对地表位移影响研究[J].西北地震学报,2019,41(2):392-398. |
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| 作者姓名： | 马荣 李永强 景立平 单振东 刘廷峻 汪刚 |
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| 作者单位： | 中国地震局工程力学研究所 地震工程与工程振动重点实验室, 黑龙江 哈尔滨 150080,中国地震局工程力学研究所 地震工程与工程振动重点实验室, 黑龙江 哈尔滨 150080,中国地震局工程力学研究所 地震工程与工程振动重点实验室, 黑龙江 哈尔滨 150080,中国地震局工程力学研究所 地震工程与工程振动重点实验室, 黑龙江 哈尔滨 150080,中国地震局工程力学研究所 地震工程与工程振动重点实验室, 黑龙江 哈尔滨 150080,中国地震局工程力学研究所 地震工程与工程振动重点实验室, 黑龙江 哈尔滨 150080 |
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| 基金项目： | 中国地震局工程力学研究所基本科研业务费专项（2014B03，2017B10，2017B14）；国家重点研发计划（2016YFC0800205）；国家自然科学基金（51438004） |
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| 摘 要： | 基于数值模拟方法系统研究脉冲与正弦SH波及P波垂直入射半圆弧凹陷场地时的地表位移响应，并与相应解析解进行了对比分析。P波入射时，半圆弧凹陷场地由于P波与反射SV波的干涉产生Rayleigh波，会对场地自由表面的稳态位移响应幅值产生较大影响。凹陷内部的归一化Z向位移幅值相比没有考虑Rayleigh波生成时有较大的不同，其在凹陷边缘处没有什么变化，而在凹陷向两侧延伸的方向，会有压缩作用；归一化X向位移幅值在凹陷内部无太大变化，在凹陷向两侧延伸的方向，会有波动状的归一化X向位移幅值。
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| 关 键 词： | P波 SH波 半圆弧凹陷场地 数值模拟 Rayleigh波 地表位移 |
| 收稿时间： | 2018/5/30 0:00:00 |
Influence of a Semi-circular Canyon Site on Ground SurfaceDisplacement Due to Incidence of Elastic Waves |
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| MA Rong,LI Yongqiang,JING Liping,SHAN Zhendong,LIU Tingjun and WANG Gang.Influence of a Semi-circular Canyon Site on Ground SurfaceDisplacement Due to Incidence of Elastic Waves[J].Northwestern Seismological Journal,2019,41(2):392-398. |
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| Authors: | MA Rong LI Yongqiang JING Liping SHAN Zhendong LIU Tingjun and WANG Gang |
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| Institution: | Key Laboratory of Earthquake Engineering and Engineering Vibration, Institute of Engineering Mechanics, China Earthquake Agency, Harbin 150080, Heilongjiang, China,Key Laboratory of Earthquake Engineering and Engineering Vibration, Institute of Engineering Mechanics, China Earthquake Agency, Harbin 150080, Heilongjiang, China,Key Laboratory of Earthquake Engineering and Engineering Vibration, Institute of Engineering Mechanics, China Earthquake Agency, Harbin 150080, Heilongjiang, China,Key Laboratory of Earthquake Engineering and Engineering Vibration, Institute of Engineering Mechanics, China Earthquake Agency, Harbin 150080, Heilongjiang, China,Key Laboratory of Earthquake Engineering and Engineering Vibration, Institute of Engineering Mechanics, China Earthquake Agency, Harbin 150080, Heilongjiang, China and Key Laboratory of Earthquake Engineering and Engineering Vibration, Institute of Engineering Mechanics, China Earthquake Agency, Harbin 150080, Heilongjiang, China |
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| Abstract: | The surface displacement responses of a semi-circular canyon site subjected to normal incidence of SH and P waves were studied using a numerical simulation method. Results were compared and analyzed with the corresponding analytical solutions. Subjected to P waves, the Rayleigh wave was generated on the semi-circular canyon site, and had certain influence on the displacement response amplitude of the free surface of the site. In the canyon, the normalized displacement amplitude in the Z direction was quite different from that without consideration of the Rayleigh wave, though there was no change at the canyon edge. There was a compression effect in the extension direction from the canyon to both sides. The normalized displacement amplitude in the X direction had no significant change in the canyon, but changed in the extension direction from the canyon to both sides. |
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| Keywords: | P-wave SH wave semicircular canyon numerical simulation Rayleigh wave surface displacement |
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