Analysis of strong ground motion characteristics recorded on reclaimed soil site
Analysis of strong ground motion characteristics recorded on reclaimed soil site
复制标题
复垦场地强地震动特征分析
DOI：
10.1088/1755-1315/304/3/032022
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发表时间：
2019-09
期刊：
影响因子：
--
通讯作者：
李小军
中科院分区：
文献类型：
--
作者：
刘培玄;李小军
本文讨论了围垦场地的强地震动与自由场地震动的区别。确定了在何种条件下可以忽略围垦土的影响，将围垦土场地的地震动视为自由场。通过分析填海区强地震动观测的实际情况，建立了填海区的有限元模型。采用集中质量显式动力有限元法，分析了剪切波速和填土厚度对自由场地震动的影响。提出用重塑土取代较厚的吹填土，以减小吹填土场地对自由场地地震动的影响，并通过数值模拟分析了其效果。结果表明，填土场地的地震动峰值和反应谱与自由场地有显著差异。随着复垦土厚度的增加，这种影响更加明显。用重塑土代替复垦土可以减少复垦土对自由场地的影响。研究结论为合理利用填海场地的强震记录和强震台站的建设提供了理论依据。
This paper discusses the difference between the strong ground motion of reclaimed soil sites and those of free-field ground motion. We determine under what conditions the influence of reclaimed soil can be ignored, and the ground motion on the reclaimed soil site can be regarded as a free field. Finite element models of reclaimed soil were constructed by analyzing the actual situation of strong ground motion observation on reclaim soil sites. Using a “lumped mass explicit dynamic finite element” method, the effects of shear wave velocity and thickness of reclaimed soil on free-field ground motion are analyzed. Replacing thicker reclaimed soil with remolded soil is proposed to reduce the impact of reclaimed soil sites on the ground motion of free field sites, the effects of which are analyzed by numerical simulation. Results show that the ground motion peak and the response spectra of the reclaimed soil site are significantly different from those of the free field site. With increasing reclaimed soil thickness, the influence is more noticeable. The impact of reclaimed soil on the free-field site can be reduced with reclaimed soil being replaced by remolding soil. The conclusions provide a theoretical basis for the rational use of strong ground motion records on the reclaimed soil site and the construction of strong motion stations.
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DOI：
10.1016/s0165-1250(98)80008-4
发表时间：
1998
期刊：
Developments in Geotechnical Engineering
影响因子：
--
作者：
Liao Zhen-peng
通讯作者：
Liao Zhen-peng
影响因子：
2.8
作者：
Lili Xie;Zhe Qu
通讯作者：
Zhe Qu
影响因子：
4.5
作者：
LIAO, ZP;LIU, JB
通讯作者：
LIU, JB
影响因子：
2.4
作者：
Liao, ZP
通讯作者：
Liao, ZP