| 基于三维弹塑性随机有限元的可靠度计算 |
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| 引用本文： | 刘宁,卓家寿.基于三维弹塑性随机有限元的可靠度计算[J].水利学报,1996,20(9):53-62. |
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| 作者姓名： | 刘宁 卓家寿 |
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| 作者单位： | 河海大学工程力学系，清华大学水利水电工程系 |
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| 摘 要： | 本文给出了基于增量理论的三维弹塑性随机有限元及可靠度计算公式，并针非线性有限元的子增量变Ｋｐ迭代法推导出相应的有限元迭代格式和加速收敛公式，为反映荷载分级的随机性，本文提出了水压荷载随机分级的双参数法，利用弹塑性随机有限元计算可靠度时，提出了应主空间表征法高效地计算出“塑性单元”的可靠指标，文末对某一大型碾压混凝土重力坝进行计算，结果表明了本文理论方法的重要性和实用性。
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| 关 键 词： | 随机有限元 结构可靠度 碾压混凝土坝 |
^Reliability analysis based on 3-D elasto-plastic SFEM |
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| Liu Ning, Zhuo Jiashou.^Reliability analysis based on 3-D elasto-plastic SFEM[J].Journal of Hydraulic Engineering,1996,20(9):53-62. |
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| Authors: | Liu Ning Zhuo Jiashou |
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| Affiliation: | Hohai University |
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| Abstract: | D elasto-plastic SFEM and reliability anlysis based on the updated scheme is presented in this paper. 3-D elasto-plastic SFEM iteration method based on the changing Kp iteration method and corresponding fastening method is derived. In consideration of random loading, water pressure (including ordinary surficial loads) random seperating method is put forward and strain-space representation mothod is used to calculate the reliability of plastic elements efficienhy. The reliability of a large RCC (RCD) gravity dam is calculated as an example. |
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| Keywords: | nonlinear structure SFEM reliability probability elasto-plastic material |
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