The paper is focused on the assessment of seismic fragility curves for circular tunnels under moderate to severe earthquakes with aim improving reliability risk underground infrastructural networks. Non-linear two-dimensional dynamic analyses were performed different tunnel and soil configurations by using finite-difference method implemented in Flac2D software. applied input motions selected c...

Abstract The vibration velocity and frequency of rock mass are closely related to the instability failure building. step topography has great influence on blasting wave propagation. Therefore, it is significance study dynamic response subjected load. In this paper, FLAC2D program used plane strain mode adopted in calculation, load assumed be a triangular pulse which applied one side calculating...

The Brazilian Test is the most used test to determine indirect tensile strength for brittle materials like concrete. It has been observed that success of depends on cracks initiation point position and therefore arch loading angle; a crack appears in center disk when valid. To this effect, using Fast Lagrangian Continua code FLAC2D; numerical analyses were performed study impact angle initial c...

The spatial incoherence of ground motion during an earthquake can have a significant effect on the dynamic response engineering structures such as bridges, dams, nuclear power plants and lifeline facilities. main objective this paper is to study anisotropic heterogeneities in soil layer overlying homogeneous bedrock lagged coherency surface motion. A set numerical experiments performed based 2D...

there are several methods for analysing the behaviour of underground structures under different loading conditions. most of these methods have many simplifications; therefore, in some cases, the results are too conservative and a very high safety factor, usually of more than 2 is needed. on the other hand, for stability analysis and the designing of support systems, these methods consider segme...

Low height embankments are widely used as road for highways and rural roads in India. Sometimes, the construction of such types on soft foundation soil becomes mandatory. In addition to problematic soil, seismic excitation might also play a significant role stability an embankment. The present study analyses response low embankment with under earthquake loading. Numerical simulations have been ...