In late October,at the invitation of friendly organizations in Cambodia and Laos,a Chinese NGO Delegation visited the two countries.The delegation was made up of 6 members from the Chinese Association for Internationa...In late October,at the invitation of friendly organizations in Cambodia and Laos,a Chinese NGO Delegation visited the two countries.The delegation was made up of 6 members from the Chinese Association for International Understanding,Chinese People’s Association for Peace and Disarmament,China NGO Network for International Exchanges and China Foundation for Peace and Development respectively.Though the visit展开更多
With the support of the National Natural Science Foundation of China,a collaborative study by Dr.Chen Lin(陈林)from the Institute of Geology and Geophysics,Chinese Academy of Sciences,Dr.Fabio Capitanio from Monash Un...With the support of the National Natural Science Foundation of China,a collaborative study by Dr.Chen Lin(陈林)from the Institute of Geology and Geophysics,Chinese Academy of Sciences,Dr.Fabio Capitanio from Monash University,Dr.Lijun Liu from the University of Illinois at Urbana-Champaign and Taras Gerya from Swiss Federal Institute of Technology Zurich demonstrates that the unique shape and complex deep structure of the Tibetan plateau may be controlled mostly by the strength heterogeneity展开更多
In this paper, a total criterion on elastic and fatigue failure in complex stress, that is. octahedral stress strength theory on dynamic and static states on the basis of studying modern and classic strength theories....In this paper, a total criterion on elastic and fatigue failure in complex stress, that is. octahedral stress strength theory on dynamic and static states on the basis of studying modern and classic strength theories. At the same time, an analysis of an independent and fairly comprehensive theoretical system is set up. It gives generalized failure factor by 36 materials and computative theory of the 11 states of complex stresses on a point, and derives the operator equation on generalized allowable strength and a computative method for a total equation can be applied to dynamic and static states. It is illustrated that the method has a good exactness through computation of eight examples of engineering. Therefore, the author suggests applying it to engineering widely.展开更多
A new non-Euclidean continuum damage model is proposed to investigate the zonal disintegration phenomenon of the surrounding rocks around deep spherical tunnels under hydrostatic pressure condition as well as the tota...A new non-Euclidean continuum damage model is proposed to investigate the zonal disintegration phenomenon of the surrounding rocks around deep spherical tunnels under hydrostatic pressure condition as well as the total elastic stress field distributions.The elastic stress fields of the surrounding rocks around deep spherical tunnels under hydrostatic pressure condition axe obtained.If the elastic stresses of the surrounding rocks satisfy the strength criterion of the deep rock masses,the number,size and location of fractured and nonfractured zones are determined.The effect of physico-mechanical parameters of the surrounding rocks on the zonal disintegration phenomenon is studied and numerical computation is carried out.It is found from numerical results that the number,size and location of fractured and non-fractured zones are sensitive to the physico-mechanical parameters of the surrounding rocks.展开更多
文摘In late October,at the invitation of friendly organizations in Cambodia and Laos,a Chinese NGO Delegation visited the two countries.The delegation was made up of 6 members from the Chinese Association for International Understanding,Chinese People’s Association for Peace and Disarmament,China NGO Network for International Exchanges and China Foundation for Peace and Development respectively.Though the visit
文摘With the support of the National Natural Science Foundation of China,a collaborative study by Dr.Chen Lin(陈林)from the Institute of Geology and Geophysics,Chinese Academy of Sciences,Dr.Fabio Capitanio from Monash University,Dr.Lijun Liu from the University of Illinois at Urbana-Champaign and Taras Gerya from Swiss Federal Institute of Technology Zurich demonstrates that the unique shape and complex deep structure of the Tibetan plateau may be controlled mostly by the strength heterogeneity
文摘In this paper, a total criterion on elastic and fatigue failure in complex stress, that is. octahedral stress strength theory on dynamic and static states on the basis of studying modern and classic strength theories. At the same time, an analysis of an independent and fairly comprehensive theoretical system is set up. It gives generalized failure factor by 36 materials and computative theory of the 11 states of complex stresses on a point, and derives the operator equation on generalized allowable strength and a computative method for a total equation can be applied to dynamic and static states. It is illustrated that the method has a good exactness through computation of eight examples of engineering. Therefore, the author suggests applying it to engineering widely.
基金supported by the National Natural Science Foundation of China(Nos.51279218,51021001 and 51078371)Natural Science Foundation Project of CQ CSTC(No.CSTC,2009BA4046)the Fundamental Research Funds forthe Central Universities(No.CDJZR10205501)
文摘A new non-Euclidean continuum damage model is proposed to investigate the zonal disintegration phenomenon of the surrounding rocks around deep spherical tunnels under hydrostatic pressure condition as well as the total elastic stress field distributions.The elastic stress fields of the surrounding rocks around deep spherical tunnels under hydrostatic pressure condition axe obtained.If the elastic stresses of the surrounding rocks satisfy the strength criterion of the deep rock masses,the number,size and location of fractured and nonfractured zones are determined.The effect of physico-mechanical parameters of the surrounding rocks on the zonal disintegration phenomenon is studied and numerical computation is carried out.It is found from numerical results that the number,size and location of fractured and non-fractured zones are sensitive to the physico-mechanical parameters of the surrounding rocks.
