| 水平动载下桶形基础变形的离心机实验研究 |
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| 引用本文： | 鲁晓兵,王义华,张建红,孙国亮,时忠民.水平动载下桶形基础变形的离心机实验研究[J].岩土工程学报,2005,27(7):789-791. |
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| 作者姓名： | 鲁晓兵 王义华 张建红 孙国亮 时忠民 |
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| 作者单位： | 中国科学研究院力学所；清华大学水利系；中海油研究中心 北京100080；北京100080；北京100084；北京100027； |
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| 基金项目： | 国家自然科学基金资助项目(10202024)，中国科学院、海洋石油总公司联合重大项目“新型海洋平台关键技术研究” |
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| 摘 要： | 通过离心机实验研究发现,在等效动冰载作用下,桶周围砂土地基发生软化或液化。当载荷幅值超过一定值时,在激振过程中桶产生了明显的沉降,桶的沉降较远处土体明显地快。由于从桶近区到远区的沉降差别,导致离桶一定距离处出现一个环状裂纹。随着载荷幅值的增加、结构重的增加和桶高的减小(桶直径相同),桶的沉降增加。
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| 关 键 词： | 饱和土 离心机实验 沉降 动冰载 |
| 文章编号： | 1000-4548(2005)07-0789-03 |
Centrifuge test on the deformation of bucket foundation under horizontal vibration load |
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| LU Xiao-bing,WANG Yi-hua,ZHANG Jian-hong,SUN Guo-liang,SHI Zhong-min.Centrifuge test on the deformation of bucket foundation under horizontal vibration load[J].Chinese Journal of Geotechnical Engineering,2005,27(7):789-791. |
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| Authors: | LU Xiao-bing WANG Yi-hua ZHANG Jian-hong SUN Guo-liang SHI Zhong-min |
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| Affiliation: | 1. Institute of mechanics Chinese Academy of Sciences Beijing 100080 China 2. Department of Hydraulic Engineering Tsinghua University Beijing 100080 China 3. Research Centre China Ocean Oil Co. Beijing 100027 China |
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| Abstract: | The centrifuge test results show that the sand layer around the bucket foundation softens or liquefies under equivalent dynamic ice-induced load. When the load amplitude is above a critical value, the bucket settles obviously during the dynamic loading. The settlement of the bucket is larger than the sand layer far away from the bucket side wall. There exist cyclical cracks in the sand layer because the differential settlements. The settlement of the bucket increases with the increase of load amplitude and the weight of structure and the decrease of the bucket height (with the same bucket diameter). |
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| Keywords: | saturated sand centrifuge experiments settlement dynamic ice-induced loading |
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