At present,the methods of analyzing the stability of slope under earthquake are not accurate and reasonable because of some limitations. Based on the real dynamic tensile-shear failure mechanism of slope,the paper pro...At present,the methods of analyzing the stability of slope under earthquake are not accurate and reasonable because of some limitations. Based on the real dynamic tensile-shear failure mechanism of slope,the paper proposes dynamic analysis of strength reduction FEM (finite element method) and takes the reduction of shear strength parameters and tensile strength parameters into consideration. And it comprehensively takes the transfixion of the failure surface,the non-convergence of calculation and mutation of displacement as the criterion of dynamic instability and failure of the slope. The strength reduction factor under limit state is regarded as the dynamic safety factor of the slope under earthquake effect and its advantages are introduced. Finally,the method is applied in the seismic design of anchors supporting and anti-slide pile supporting of the slope. Calculation examples show that the application of dynamic analysis of strength reduction is feasible in the seismic design of slope engineering,which can consider dynamic interaction of supporting structure and rock-soil mass. Owing to its preciseness and great advantages,it is a new method in the seismic design of slope supporting.展开更多
Bhutan is an innocent scapegoat in India’s machinations More than two months have passed since Indian border troops trespassed into the Donglang(Doklam)area,part of southwest China’s Tibet Autonomous Region.India fi...Bhutan is an innocent scapegoat in India’s machinations More than two months have passed since Indian border troops trespassed into the Donglang(Doklam)area,part of southwest China’s Tibet Autonomous Region.India fi rst claimed it to be a response to the Chinese army crossing the border and advancing into Indian territory.展开更多
The state and nature of china-lndia ties affects regional cooperation and security while exerting a crucial impact on the changing international landscape.
基金Financial Support by Special Research fund of State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology) (GZ2009-14)Special Research fund of Minis-try of Education Key Laboratory of Urban Security and Disaster Engineering
文摘At present,the methods of analyzing the stability of slope under earthquake are not accurate and reasonable because of some limitations. Based on the real dynamic tensile-shear failure mechanism of slope,the paper proposes dynamic analysis of strength reduction FEM (finite element method) and takes the reduction of shear strength parameters and tensile strength parameters into consideration. And it comprehensively takes the transfixion of the failure surface,the non-convergence of calculation and mutation of displacement as the criterion of dynamic instability and failure of the slope. The strength reduction factor under limit state is regarded as the dynamic safety factor of the slope under earthquake effect and its advantages are introduced. Finally,the method is applied in the seismic design of anchors supporting and anti-slide pile supporting of the slope. Calculation examples show that the application of dynamic analysis of strength reduction is feasible in the seismic design of slope engineering,which can consider dynamic interaction of supporting structure and rock-soil mass. Owing to its preciseness and great advantages,it is a new method in the seismic design of slope supporting.
文摘Bhutan is an innocent scapegoat in India’s machinations More than two months have passed since Indian border troops trespassed into the Donglang(Doklam)area,part of southwest China’s Tibet Autonomous Region.India fi rst claimed it to be a response to the Chinese army crossing the border and advancing into Indian territory.
文摘The state and nature of china-lndia ties affects regional cooperation and security while exerting a crucial impact on the changing international landscape.
