Experiments to determine the vertical static bearing capacity are carried out first in laboratory which is taken as a reference for choosing the amplitudes of vertical dynamic loading. Then a series of experiments are carried out to study the influences of factors, such as the scales of bucket, the amplitude and frequency of loading, the density of soils etc.. According to the experimental resu...

among different discretization approaches, finite difference method (fdm) is widely used for acoustic and elastic full-wave form modeling. an inevitable deficit of the technique, however, is its sever requirement to computational resources. a promising solution is parallelization, where the problem is broken into several segments, and the calculations are distributed over different processors. ...

an energy based damage index based on a new nonlinear finite element (fe) approach applicable to rc structures subjected to cyclic, earthquake or monotonic loading is proposed. the proposed method is based on the evaluation of nonlinear local degradation of materials and taking into account of the pseudo-plastic hinge produced in the critical sections of the structure. a computer program is dev...

Vibratory pile diving with resonance-free technique is an advanced construction approach that can play important part in underground engineering. This paper aims to propose a numerical model for this approach, which commonly involves soils below the groundwater table. Such simulations are still challenging tasks as dynamic analyses considering hydro-mechanical interactions very complicated. Sev...

Although segmental tunnel linings are often used for seismic areas, the influence of segment joints on the segmental lining behavior under seismic loading has not been thoroughly considered in the literature. This paper presents the results of a numerical study investigating the effects of the rotational, axial, and radial joint stiffness of the longitudinal joints on the structural force...

The paper formulates a statement of the problem and develops mathematical models deformation underground pipelines under spatially variable loading, taking into account accumulation damageability materials. Based on theory small elasto-plastic deformations Hamilton-Ostrogradsky variational principle, differential equations motion (equilibrium) system alternating loading with appropriate boundar...

An analysis is performed to study the flow and heat transfer characteristics of a non-Newtonian Ostwald-de Waele fluid flow over a non-linearly stretching surface in the presence of internal heat generation/ absorption. The stretching velocity and the prescribed surface temperature are assumed to vary with a powerlaw distance from the slit. Using a similarity transformation the governing equati...