'Facing History And Ourselves'(FHAO)是南京外国语学校从国外引进并经本土化改造、业已实践了十年的跨学科选修课程,课程设计和教学实践注重基于'人'的健全成长进行多学科融合教学,尤其注重借助史料研读、多维度思考...'Facing History And Ourselves'(FHAO)是南京外国语学校从国外引进并经本土化改造、业已实践了十年的跨学科选修课程,课程设计和教学实践注重基于'人'的健全成长进行多学科融合教学,尤其注重借助史料研读、多维度思考等多种学习方法,促使学生养成健全人格,对学生历史学科核心素养的培养具有不可轻觑的启示意义。南外英语名师尚媛媛代表南外FHAO课程组在本次大会上就此作了专题演讲,引起不小反响和热烈讨论。这篇文章是她与南外历史学科组组长周媛媛老师合写的,也是跨科合作。展开更多
This study presents earthquake performance analysis of the Torul Concrete-Faced Rockfill （CFR） Dam with two-dimensional dam-soil and dam-soil-reservoir finite element models. The Lagrangian approach was used with fl...This study presents earthquake performance analysis of the Torul Concrete-Faced Rockfill （CFR） Dam with two-dimensional dam-soil and dam-soil-reservoir finite element models. The Lagrangian approach was used with fluid elements to model impounded water. The interface elements were used to simulate the slippage between the concrete face slab and the rockfill. The horizontal component of the 1992 Erzincan earthquake, with a peak ground acceleration of 0.515g, was considered in time-history analysis. The Drucker-Prager model was preferred in nonlinear analysis of the concrete slab, rockfill and foundation soil. The maximum principal stresses and the maximum displacements in two opposite directions were compared by the height of the concrete slab according to linear time-history analysis to reveal the effect of reservoir water. The changes of critical displacements and principal stresses with time are also shown in this paper. According to linear and nonlinear time-history analysis, the effect of the reservoir water on the earthquake performance of the Torul CFR Dam was investigated and the possible damage situation was examined. The results show that the hydrodynamic pressure of reservoir water leads to an increase in the maximum displacements and principal stresses of the dam and reduces the earthquake performance of the dam. Although the linear time-history analysis demonstrates that the earthquake causes a momentous damage to the concrete slab of the Torul CFR Dam, the nonlinear time-history analysis shows that no evident damage occurs in either reservoir case.展开更多
文摘'Facing History And Ourselves'(FHAO)是南京外国语学校从国外引进并经本土化改造、业已实践了十年的跨学科选修课程,课程设计和教学实践注重基于'人'的健全成长进行多学科融合教学,尤其注重借助史料研读、多维度思考等多种学习方法,促使学生养成健全人格,对学生历史学科核心素养的培养具有不可轻觑的启示意义。南外英语名师尚媛媛代表南外FHAO课程组在本次大会上就此作了专题演讲,引起不小反响和热烈讨论。这篇文章是她与南外历史学科组组长周媛媛老师合写的,也是跨科合作。
文摘This study presents earthquake performance analysis of the Torul Concrete-Faced Rockfill （CFR） Dam with two-dimensional dam-soil and dam-soil-reservoir finite element models. The Lagrangian approach was used with fluid elements to model impounded water. The interface elements were used to simulate the slippage between the concrete face slab and the rockfill. The horizontal component of the 1992 Erzincan earthquake, with a peak ground acceleration of 0.515g, was considered in time-history analysis. The Drucker-Prager model was preferred in nonlinear analysis of the concrete slab, rockfill and foundation soil. The maximum principal stresses and the maximum displacements in two opposite directions were compared by the height of the concrete slab according to linear time-history analysis to reveal the effect of reservoir water. The changes of critical displacements and principal stresses with time are also shown in this paper. According to linear and nonlinear time-history analysis, the effect of the reservoir water on the earthquake performance of the Torul CFR Dam was investigated and the possible damage situation was examined. The results show that the hydrodynamic pressure of reservoir water leads to an increase in the maximum displacements and principal stresses of the dam and reduces the earthquake performance of the dam. Although the linear time-history analysis demonstrates that the earthquake causes a momentous damage to the concrete slab of the Torul CFR Dam, the nonlinear time-history analysis shows that no evident damage occurs in either reservoir case.
