摘要
由于有限元计算不收敛判据、塑性区贯通判据和位移突变判据在工程应用中均有一些局限性,在郑东健等人研究的基础上把总塑性应变能突变判据应用到边坡的稳定分析中,同时结合实际边坡算例,对这四种判据所得结果进行比较.结果表明:计算不收敛判据与迭代次数、收敛准则和收敛容差有关;塑性区贯通判据受人为因素影响较大;位移突变判据与计算监测点的位置、位移选取方式密切相关;总塑性应变能是一单值,受外界因素影响较小,并能反映边坡的整体稳定情况,是边坡失稳有限元分析中较好的判据.
Due to the convergence of numerical computation criterion, the connectivity of plastic zone criterionand the mutation of displacement criterion have some limitations in the engineering application , so the catastro-phe of plastic strain energy criteria is applied to the analysis of slope stability on the basis of Dong - jian Zhengct al , and the article combins with the actual example to compare the results of these four criteria. The findingsof this study are shown：the convergence of numerical computation criterion is associated with convergence cri-terion , the number of iterations and convergence tolerance ; the connectivity of plastic zone criterion is affectedobviously by artificial factor; the mutation of displacement criterion may produce different stability analysis re-sult due to the location of the monitoring point and the selection mode of displacement ; plastic strain energy isunique and reflects correctly for slope stability, so the catastrophe of plastic strain energy of slope is a bettercriterion.
出处
《济宁学院学报》
2017年第2期30-34,共5页
Journal of Jining University
基金
河海大学天文学院校级课题(WT16007)
关键词
边坡
失稳判据
突变模型
总塑性应变能
slope
instability criteria
catastrophe model
plastic strain energy
