| 复杂加载路径下堆石料动力本构模型及数值模拟 |
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| 引用本文： | 吴兴征,栾茂田,李相菘.复杂加载路径下堆石料动力本构模型及数值模拟[J].世界地震工程,2001,17(1):9-14. |
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| 作者姓名： | 吴兴征 栾茂田 李相菘 |
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| 作者单位： | 1. 大连理工大学土木工程系
2. 香港科技大学土木及结构工程系, |
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| 基金项目： | 国家自然科学基础重点资助项目(59639250)及国家教育部跨世纪优秀人才培养计划研究基金资助项目 |
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| 摘 要： | 采用所发展的亚塑性边界面模型，对堆石料在不同固结应力状态、排水条件和加载方式下的典型试验进行了数值模拟分析。在本构模型的数值实施中，联合应用自适应多步回退欧拉积分规律和局部迭代加快了迭代收敛的速度，提高了积分精度，进而编制了计算程序TESTROCK。数值模拟结果与已有试验成果的对比分析表明，该模型能够合理、有效地反映堆石料在复杂加载路径下的变形和强度特性，为深入揭示堆石料变形和孔隙水压力的发展特性和进行高混凝土面板堆石坝的非线性耦合静动力分析提供了理论基础。
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| 关 键 词： | 边界面模型 动力特性 堆石料 固结应力 本构模型 加载路径 数值模拟 |
| 文章编号： | 1007-6069(2001)01-0009-06 |
Bounding-surface hypoplastic model for rockfill materials under complex loading paths and its verification |
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| WU Xing-zheng,LUAN Mao-tian,LI Xiang-song.Bounding-surface hypoplastic model for rockfill materials under complex loading paths and its verification[J].World Information On Earthquake Engineering,2001,17(1):9-14. |
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| Authors: | WU Xing-zheng LUAN Mao-tian LI Xiang-song |
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| Abstract: | The bounding surface hypoplasticity model for rockfill materials modified by the authors is employed to characterize the material behavior for typical tests under different consolidation stress state, drainage condition and loading pattern. An adaptive multistep integration procedure in conjunction with local iteration is used in numerical implementation of the constitutive model to improve the convergence of global iteration and integral precision. Comparisons between model simulations and a sequence of experimental results show that the proposed model and calibration simulation technique are workable effectively for complex loading paths using an unique set of parameters for a given rockfill. The constitutive model is helpful to examine build ing-up process of residual strain and pore water pressure for rockfill and it can be implemented in static-dynamic coupling analyses of concrete-faced rockfill dams under complex loading conditions. |
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| Keywords: | elasto-plasticity bounding surface model dynamic behavior rockfills |
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