| 中国软土及其动力学特性研究的概况 |
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| 引用本文： | 乔峰,薄景山,,王亮,常晁瑜,,张兆鹏,齐文浩.中国软土及其动力学特性研究的概况[J].世界地震工程,2019,35(4):150-161. |
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| 作者姓名： | 乔峰 薄景山 王亮 常晁瑜 张兆鹏 齐文浩 |
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| 作者单位： | 1. 中国地震局工程力学研究所 中国地震局地震工程与工程振动重点实验室, 黑龙江 哈尔滨 150080;2. 防灾科技学院, 河北 三河 065201;3. 中煤科工集团西安研究院有限公司, 陕西 西安 710077;4. 中北大学, 山西 太原 030051 |
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| 摘 要： | 软土由于具有强度低、渗透性小、压缩性高、欠固结以及流变效应等不利于工程建设的特性，通常不被选做天然地基。但当软土以建筑环境或地基夹层存在时，对工程会带来一定的危害。在动力的作用下，软土表现特殊的力学行为，在地震作用有时会产生震陷；位于表层的软土放大效果显著；位于底层的软土有时具有隔震的作用。由于软土在动力学实验方面存在一定的困难，并且缺少软土场地的强震记录，使得这方面的研究受到一定影响。简要介绍了软土的成因及工程特性；总结和归纳了国内外软土的动剪切模量比和阻尼比以及剪切波速等动力学参数的特征，评述了软土动本构关系和地震反应特性等方面的研究进展，在此基础上提出了目前需要进一步开展研究的问题。该项工作对从事软土研究的科技工作者有一定的参考价值。
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| 关 键 词： | 软土 动力特性 本构关系 地震响应 研究现状 |
Survey of China’s soft soil and its dynamic characteristics |
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| QIAO Feng,BO Jingshan,' target="_blank" rel="external">,WANG Liang,CHANG Chaoyu,' target="_blank" rel="external">,ZHANG Zhaopeng,QI Wenhao.Survey of China’s soft soil and its dynamic characteristics[J].World Information On Earthquake Engineering,2019,35(4):150-161. |
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| Authors: | QIAO Feng BO Jingshan " target="_blank">' target="_blank" rel="external"> WANG Liang CHANG Chaoyu " target="_blank">' target="_blank" rel="external"> ZHANG Zhaopeng QI Wenhao |
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| Affiliation: | 1. Key Laboratory of Earthquake Engineering and Engineering Vibration, Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China;2. Institute of Disaster Prevention, Sanhe 065201, China;3. Xian Research Institute of China Coal Research Institute, Xi’an 710077, China;4. North University of China, Taiyuan 030051, China |
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| Abstract: | Soft soils are generally not selected as natural foundations due to their low strength, low permeability, high compressibility, under consolidation and rheological effects, which are not conducive to engineering construction. However, when the soft soil exists in the built environment or the interlayer of the foundation, it will bring certain harm to the project. Under the action of dynamics, soft soils exhibit special mechanical behaviors, sometimes causing earthquake subsidence. The soft soil on the surface layer has a significant amplification effect; the soft soil at the bottom layer sometimes has the effect of isolation. Due to the difficulty in the dynamic tests of soft soil and the lack of strong earthquake records in soft soil sites, this aspect of research has been affected. This paper briefly introduces the genesis and engineering characteristics of soft soil. The characteristics of dynamic shear modulus ratio, damping ratio and shear wave velocity of soft soil at home and abroad are summarized. The dynamic constitutive relation of soft soil and research progress in seismic response characteristics are reviewed. On this basis, the issues that need further research are proposed. This paper has reference values for scientific and technological workers engaged in soft soil research. |
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| Keywords: | soft soil dynamic characteristics constitutive relation seismic response research status |
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