Indian Journal of Advances in Chemical Science Volume: 5, Issue: 1, January 2016
 
              		   
   

ISSN No.: 2320-0898 (Print); 2320-0928 (Electronic)

DOI: 10.22607/IJACS.2017.501008

 

   

Research Article

 
      Simplified Pseudostatic Analysis of Earthquake Induced Landslides    
K. Pushpa*, S. K. Prasad, P. Nanjundaswamy
ABSTRACT
 
Landslides are major problems in hilly areas. There have been many damaging landslides in recent times that have taken huge toll of life. Cloud burst, heavy rains and earthquake are among many triggering mechanisms causing landslides. Recent earthquakes in Sikkim (2013), Nepal (2015), and Kumamoto (2016) have all caused seismic induced landslides leading to heavy damage. Hence, it is extremely important to assess the performance of slopes during earthquakes. Earthquakes are unpredictable and uncertain. The behavior of soil slopes are complex and it is hard to collect relevant input data. These result in difficulty in assessing the seismic performance of slopes. It may, therefore, be necessary to simplify the analysis of slopes subjected to earthquake. One simplified approach is to idealize the dynamic earthquake force by equivalent static inertial force. This idealization is acceptable considering the massive volume and weight of geotechnical structures. The majority of failures happen in first mode of vibration and failures are mainly due to weakening of the strength and stiffness characteristics of soil. This paper focuses on the use of GEOSTUDIO, a finite element software for problems associated with geotechnical engineering, to solve seismic slope stability problems from pseudostatic approach. The effects of horizontal and vertical components of acceleration on the factor of safety against slope failure are assessed and represented in graphical form. The influence of slope geometry on seismic slope instability is presented.
     
     

Key words:  Pseudostatic analysis, Stability of slopes, Earthquake, GEOSTUDIO, Landslides.

  

 

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