| 非线性破坏准则下浅埋隧道围岩压力的极限分析 |
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| 引用本文： | 杨小礼,王作伟.非线性破坏准则下浅埋隧道围岩压力的极限分析[J].中南大学学报(自然科学版),2010,41(1). |
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| 作者姓名： | 杨小礼 王作伟 |
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| 作者单位： | 中南大学,土木建筑学院,湖南,长沙,410075 |
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| 基金项目： | 全国百篇优秀博士学位论文基金资助项目，湖南省自然科学基金资助项目 |
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| 摘 要： | 采用土体非线性破坏准则,基于浅埋隧道的泰沙基破坏模式,利用极限分析法中的上限定理,推导非线性破坏准则下浅埋隧道围岩压力的计算公式。运用序列二次规划算法进行优化分析,得出围岩压力上限解的最优值。研究结果表明:当非线性系数m=1时,非线性破坏准则变成线性Mohr-Coulomb准则,本文方法的计算结果与泰沙基极限平衡法的计算结果比较接近,证明了本文方法的有效性;非线性系数对围岩压力上限解有较明显的影响。
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| 关 键 词： | 非线性破坏准则 浅埋隧道 围岩压力 上限定理 |
Limit analysis of earth pressure on shallow tunnel using nonlinear failure criterion |
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| YANG Xiao-li,WANG Zuo-wei.Limit analysis of earth pressure on shallow tunnel using nonlinear failure criterion[J].Journal of Central South University:Science and Technology,2010,41(1). |
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| Authors: | YANG Xiao-li WANG Zuo-wei |
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| Institution: | YANG Xiao-li,WANG Zuo-wei (School of Civil , Architectural Engineering,Central South University,Changsha 410075,China) |
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| Abstract: | Based on the known failure mechanism, the upper bound theory was applied to derive the expression of earth pressure on shallow tunnel. The upper bound solutions of earth pressure were obtained by using the nonlinear sequential quadratic programming algorithm. The results show that the upper bound solutions approximate the previously solutions when the nonlinear failure criterion reduces to linear Mohr-Coulomb criterion. The failure mechanism is feasible to limit analysis. Nonlinear coefficient has significa... |
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| Keywords: | nonlinear failure criterion shallow tunnel earth pressure upper bound theorem |
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