| 摘要: |
| 桶式基础结构是一种适用于软土地基的新型海工结构。为保证结构的可靠性，已对桶式基础使用期的承载力、稳定性和水动力特性进行了大量试验研究，但施工阶段的性状并未得到足够关注。为此制作了1∶8的小比尺模型并进行室内试验，研究设计规定的正压和负压下结构模型的内力、变形和气密性，获取了测点应变-加载时间的关系曲线。采用通用有限元软件ABAQUS对模型进行了弹性有限元分析并与试验结果比较。研究表明，桶式基础模型能承受设计规定的正压力和负压力，模型混凝土和钢筋应变变化规律与加压规律大体相符；弹性有限元分析结果与试验结果基本吻合。 |
| 关键词: 防波堤； 桶式结构； 模型试验 气密性； 有限元分析 |
| DOI： |
| 分类号:U656.2 |
| 基金项目:交通运输部西部交通建设科技项目（20113288231510） |
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| Pneumatic experiment and finite element analysis of bucket foundation model |
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GONG Jin-xin1, GAO Shu-fei2, CHEN Hao-qun3, SHEN Xue-song4
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1.State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian;2.State Key Laboratory of Hydrology Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing;3.CCCC Third Harbor Consultants Co., Ltd., Shanghai;4.Lianyungang Administrating Bureau of Harbor
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| Abstract: |
| The bucket foundation is a new kind of the marine structures which are suitable for application to soft soil. For its reliability, extensive experimental investigations have been conducted on its capacity, stability and hydrodynamic characteristics during service life, but less attention is paid to its behaviors during construction. A model scaled 1∶8 is fabricated and experimented in the laboratory. The internal force, deformation and airtightness under specified positive and negative pressures were investigated, and the relationships between strain and loading duration of each monitoring point were recorded. Elastic finite element analyses were carried out by using a commercial software ABAQUS and the results were compared with those obtained from the indoor experiments. The research results show that the model behaved well during the experiment and the strain of concrete and steel bar approximately varied in parallel with the loading process. The results of the elastic finite element analysis agree well with the results of the indoor experiments. |
| Key words: breakwater bucket foundation model experiment airtightness finite element analysis |
