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A semi-spring and semi-edge combined contact model in CDEM and its application to analysis of Jiweishan landslide
  • ISSN号:1674-7755
  • 期刊名称:《岩石力学与岩土工程学报:英文版》
  • 时间:0
  • 分类:O342[理学—固体力学;理学—力学]
  • 作者机构:[1]Institute of Mechanics, Chinese Academy of Sciences
  • 相关基金:the National Basic Research Program of the Ministry of Science and Technology of China (Grant No. 2010CB731506);the National Key Technology Research and Development Program of the Ministry of Science and Technology of China (Grant No. 2012BAK10B01);the Youth Science Fund of National Natural Science Foundation of China (Grant No. 11302230)
中文摘要:

Continuum-based discrete element method(CDEM)is an explicit numerical method used for simulation of progressive failure of geological body.To improve the efficiency of contact detection and simplify the calculation steps for contact forces,semi-spring and semi-edge are introduced in calculation.Semispring is derived from block vertex,and formed by indenting the block vertex into each face(24semisprings for a hexahedral element).The formation process of semi-edge is the same as that of semi-spring(24semi-edges for a hexahedral element).Based on the semi-springs and semi-edges,a new type of combined contact model is presented.According to this model,six contact types could be reduced to two,i.e.the semi-spring target face contact and semi-edge target edge contact.By the combined model,the contact force could be calculated directly(the information of contact type is not necessary),and the failure judgment could be executed in a straightforward way(each semi-spring and semi-edge own their characteristic areas).The algorithm has been successfully programmed in C++program.Some simple numerical cases are presented to show the validity and accuracy of this model.Finally,the failure mode,sliding distance and critical friction angle of Jiweishan landslide are studied with the combined model.

英文摘要:

Continuum-based discrete element method(CDEM)is an explicit numerical method used for simulation of progressive failure of geological body.To improve the efficiency of contact detection and simplify the calculation steps for contact forces,semi-spring and semi-edge are introduced in calculation.Semispring is derived from block vertex,and formed by indenting the block vertex into each face(24semisprings for a hexahedral element).The formation process of semi-edge is the same as that of semi-spring(24semi-edges for a hexahedral element).Based on the semi-springs and semi-edges,a new type of combined contact model is presented.According to this model,six contact types could be reduced to two,i.e.the semi-spring target face contact and semi-edge target edge contact.By the combined model,the contact force could be calculated directly(the information of contact type is not necessary),and the failure judgment could be executed in a straightforward way(each semi-spring and semi-edge own their characteristic areas).The algorithm has been successfully programmed in C++program.Some simple numerical cases are presented to show the validity and accuracy of this model.Finally,the failure mode,sliding distance and critical friction angle of Jiweishan landslide are studied with the combined model.

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期刊信息
  • 《岩石力学与岩土工程学报:英文版》
  • 主管单位:中国科学院
  • 主办单位:中国科学院武汉岩土力学研究所、中国岩石力学与工程学会、武汉大学
  • 主编:
  • 地址:湖北省武汉市小洪山中科院武汉岩土所
  • 邮编:430071
  • 邮箱:
  • 电话:027-87198182
  • 国际标准刊号:ISSN:1674-7755
  • 国内统一刊号:ISSN:42-1801/O3
  • 邮发代号:
  • 获奖情况:
  • 国内外数据库收录:
  • 荷兰地学数据库
  • 被引量:50