| 路基土回弹模量应力依赖性分析及预估模型 |
| |
| 引用本文： | 陈声凯,凌建明,罗志刚.路基土回弹模量应力依赖性分析及预估模型[J].土木工程学报,2007,40(6):95-99. |
| |
| 作者姓名： | 陈声凯 凌建明 罗志刚 |
| |
| 作者单位： | 1. 同济大学,上海,200092;上海市公路管理处,上海,200063
2. 同济大学,上海,200092 |
| |
| 基金项目： | 交通部西部交通建设科技项目 |
| |
| 摘 要： | 通过室内重复加载三轴试验研究4种常用路基土的回弹特性,分析回弹模量对体应力、侧向应力、偏应力的依赖关系。试验结果表明,回弹模量值是两个应力变量的函数,且当其中一个变量保持不变时,回弹模量值随另一变量呈非线性变化,函数关系应为幂函数形式。在此分析基础上,参考Uzan模型表达式,以偏应力和体应力为变量回归得出相应的路基土回弹模量预估模型,拟合结果良好。模型的建立,有利于更好地理解路基土的回弹特性,并为路基模量设计值的取用与路面结构力学响应计算提供可靠的技术依据。
|
| 关 键 词： | 路基土 回弹模量 重复加载三轴试验 应力依赖性 预估模型 |
| 文章编号： | 1000-131X(2007)06-0095-06 |
| 修稿时间： | 2006年9月25日 |
Stress-dependent characteristics and prediction model of the resilient modulus of subgrade soils |
| |
| Chen Sheng kai,Ling Jianming,Luo Zhigang.Stress-dependent characteristics and prediction model of the resilient modulus of subgrade soils[J].China Civil Engineering Journal,2007,40(6):95-99. |
| |
| Authors: | Chen Sheng kai Ling Jianming Luo Zhigang |
| |
| Abstract: | The dynamic resilient modulus of 4 subgrade soils were studied by using repeated loading triaxial test.The relationships between the resilient modulus,bulk stress,confining stress and deviation stress were analyzed.The result demonstrated that the resilient modulus is a function of two stress variables,and that when one stress variable is fixed,the relationship between the resilient modulus and the other stress variable is a power function.A prediction model which involves bulk stress and deviation stress was obtained from a stress-dependent analysis and the Uzan model. |
| |
| Keywords: | subgrade soils resilient modulus repeated loading triaxial test stress-dependent prediction model |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
