EARTHQUAKE RESPONSE OF SLOPES UNDER MASSIVE LOADS

Many buildings and other structures have been constructed on sloping grounds. They may pose a considerable mass on the slope particularly in congested urban areas located on sloping grounds. Traditionally, the additional mass is assumed as a rigid body connected to the ground of slope. In this case, existing approaches for stability analysis of slopes and embankments can be directly applied to solve the problem with the consideration of additional mass to the soil mass above the slope failure surface. However, the complete inertial interaction of the structures supported by the slope is not considered in this approach. In this case, the amplification of the base shear transmitted to the ground may be significantly underestimated resulting in a non-conservative evaluation of the seismic slope stability. This paper aims to study the significance of the load of massive constructions on the slope stability problem with considering soil-structure interaction. In geotechnical earthquake engineering, slope stability is one the most important issues which has been in the center of attention due to its huge and widespread damage potential. Generally, three procedures are available for slope stabilityanalysis, i.e. pseudostatic analysis, Newmark sliding block analysis and stress-deformation analysis. Pseudostatic approach was firstly presented by Terzaghi for slope stability analysis (Terzaghi, 1951). This procedure provided an index of slope stability. However, it does not provide any information when the instantaneous stability is compromised.

کلیدواژه ها:

Seismic slope stability ، Slope-structure interaction ، Total stress analysis ، Sliding displacement ، Nonlinear stress deformation analysis