基于破坏接近度的滑坡倾斜加载方式破坏相似性研究
发布时间：2018-09-03 15:02
【摘要】：为了验证倾斜加载方式导致滑坡失稳过程发生的应力场变化是否与原型相似,通过建立倾斜模型和原型滑坡的数值模型,观察破坏过程中应力应变场的相近程度,并引入基于Mohr-Coulomb屈服准则的破坏接近度函数这一概念,把每个单元的矢量信息转换为标量信息,得到2个模型的破坏接近度值相关系数,以相关系数的大小来评价模型与原型破坏过程中应力场的相似性。以千将坪滑坡为例,得出2个数值模型的破坏接近度指标变化趋势大致相同;且当折减系数为1.85,倾斜角度为[7°,8.9°]时,相关系数范围是[0.7,1.0],表明倾斜模型与原型破坏时的应力场相似,证明了倾斜加载方式能较好地重现滑坡的发生过程。
[Abstract]:In order to verify whether the stress field changes in the process of landslide instability caused by inclined loading are similar to those of the prototype, the slope model and the numerical model of the prototype landslide are established to observe the similarity of the stress and strain fields in the process of failure. The concept of failure proximity function based on Mohr-Coulomb yield criterion is introduced. The vector information of each element is transformed into scalar information, and the correlation coefficient of failure proximity value of two models is obtained. The similarity of the stress field between the model and the prototype failure process is evaluated by the magnitude of the correlation coefficient. Taking Qianbangping landslide as an example, the variation trend of the damage proximity index of the two numerical models is approximately the same, and when the reduction coefficient is 1.85 and the inclination angle is [7 掳~ 8.9 掳], the correlation coefficient range is [0.71.0], which indicates that the stress field of the slope model is similar to that of the prototype failure. It is proved that the inclined loading mode can reproduce the occurrence process of landslide.
【作者单位】： 三峡大学土木与建筑学院;
【基金】：国家自然科学基金项目(41272310) 湖北省科技支撑计划项目(2013BEC005,2015BCE038)
【分类号】：P642.22
本文编号：2220323
[Abstract]:In order to verify whether the stress field changes in the process of landslide instability caused by inclined loading are similar to those of the prototype, the slope model and the numerical model of the prototype landslide are established to observe the similarity of the stress and strain fields in the process of failure. The concept of failure proximity function based on Mohr-Coulomb yield criterion is introduced. The vector information of each element is transformed into scalar information, and the correlation coefficient of failure proximity value of two models is obtained. The similarity of the stress field between the model and the prototype failure process is evaluated by the magnitude of the correlation coefficient. Taking Qianbangping landslide as an example, the variation trend of the damage proximity index of the two numerical models is approximately the same, and when the reduction coefficient is 1.85 and the inclination angle is [7 掳~ 8.9 掳], the correlation coefficient range is [0.71.0], which indicates that the stress field of the slope model is similar to that of the prototype failure. It is proved that the inclined loading mode can reproduce the occurrence process of landslide.
【作者单位】： 三峡大学土木与建筑学院;
【基金】：国家自然科学基金项目(41272310) 湖北省科技支撑计划项目(2013BEC005,2015BCE038)
【分类号】：P642.22
【相似文献】
相关期刊论文 前1条
1 叶卫民;刘沃野;赵德勇;张敏芳;陈晓;;基于AHP-相对接近度的六西格玛计分卡改进研究[J];数学的实践与认识;2013年09期
相关会议论文 前1条
1 张立松;闫相祯;杨秀娟;杨恒林;王欣;;基于破坏接近度的煤岩破碎分级预测方法[A];2010年海峡两岸材料破坏/断裂学术会议暨第十届破坏科学研讨会/第八届全国MTS材料试验学术会议论文集[C];2010年
，本文编号：2220323
本文链接：https://www.wllwen.com/guanlilunwen/gongchengguanli/2220323.html
