| 复合地基等效弹性参数研究 |
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| 引用本文： | 张仪萍,王洋,李涛.复合地基等效弹性参数研究[J].岩土力学,2011,32(7):2106-2110. |
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| 作者姓名： | 张仪萍 王洋 李涛 |
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| 作者单位： | 1. 浙江大学 建筑工程学院，杭州 310058；2. 浙江省水利水电专科学校 土木系，杭州 310018 |
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| 摘 要： | 考虑复合地基边界约束条件的影响，采用复合地基单元体模型，基于变形一致的原则，推导了复合地基在弹性变形阶段的等效变形模量和等效泊松比的解析解。研究表明，复合地基的等效弹性常数与复合单元体侧向约束条件有关，侧向约束越强，等效变形模量越大，泊松比越小。侧限条件和无侧限条件的等效弹性常数是复合地基各种约束情况下的2个极值，在较强的侧限约束条件下，等效泊松比随置换率的变化相对明显。研究还表明，按面积加权法计算的复合变形模量偏小，而计算的复合压缩模量偏大，等效压缩模量与加权法计算的差值随置换率不同而异，并随着桩土压缩模量比的增大而增加，其差异一般可达20%～30%
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| 关 键 词： | 复合地基 等效变形模量 等效泊松比 置换率 |
| 收稿时间： | 2010-01-14 |
Study of equivalent elastic parameters of composite foundations |
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| ZHANG Yi-ping,WANG Yang,LI Tao.Study of equivalent elastic parameters of composite foundations[J].Rock and Soil Mechanics,2011,32(7):2106-2110. |
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| Authors: | ZHANG Yi-ping WANG Yang LI Tao |
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| Institution: | 1. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China; 2. Department of Civil Engineering, Zhejiang Water Conservancy and Hydropower College, Hangzhou 310018, China |
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| Abstract: | The analytical solutions of the equivalent deformation modulus and equivalent Poisson's ratio of composite foundation on the stage of elastic deformation are developed according to the deformation consistent principle and considering boundary constraint conditions based on the unit cell model.The research results indicate that the equivalent elastic constants of composite foundation are related to the lateral restraint condition of the unit cell.The equivalent deformation modulus increases as the lateral re... |
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| Keywords: | composite foundation equivalent deformation modulus equivalent Poisson's ratio replacement ratio |
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