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Study on the Seismic Stability of Slope Based on Time History Analysis Method and Finite Element Method

Author: MaFangFang
Tutor: ShaoLongTan
School: Dalian University of Technology
Course: Engineering Mechanics
Keywords: Slope Seismic Response Analysis of Safety factor Time history analysis
CLC: TU435
Type: Master's thesis
Year: 2005
Downloads: 562
Quote: 18
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Abstract


Under seismic loads slope instability of the earthquake process is closely related to the minimum factor of safety in a moment of time the process is unreasonable as indicators of the evaluation of slope stability . In this paper, the average value of the safety factor in the length of time as the evaluation index , consider the effects of seismic loading time of slope failure , may slip region search minimum safety factor mean the most dangerous sliding surface . First, the slope seismic dynamic time-history response analysis method used in this article slope finite element analysis method is introduced. Secondly, based on these two approaches are two ways to consider the timing and destruction of the earthquake cumulative slope stability analysis method . One way is to search for a fixed length of time on the minimum safety factor mean all possible slip surface safety factor when the process curve , draw slope during the earthquake , the most dangerous of the length of time the start time and the corresponding minimum safety factor mean . Another method is the history of an earthquake is divided into a number of time steps , each instantaneous minimum safety factor and the most dangerous sliding surface is obtained as the number of instantaneous ; these instantaneous most dangerous slip surface safety factor versus Search All safety factor is less than the allowed values ??periods , known as a dangerous time ; and safety factor as dangerous time on the mean evaluation that period slope stability standards , which mean can be found by comparing the safety factor on all dangerous time the minimum value , their period is the section slip surface, the most dangerous period in the history of an earthquake . Subsequently, a high rockfill dams in the type of seismic wave input , the type of peak acceleration , the type of slope stability than six conditions was calculated using the two ideas , contrast , analyze , to draw various condition parameters of the dam slope stability , and some useful conclusions ; compared with the traditional method for stability analysis demonstrated paper analyzes the rationality and feasibility of the method .

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CLC: > Industrial Technology > Building Science > Soil mechanics,foundation engineering > Soil Mechanics > Soil Dynamics and Vibration foundation
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