作者：
Cividini, A.
Politecnico di Milano Milan Italy
the studies on the dynamic analysis of saturated soils led to various numerical approaches that involve different assumptions, different governing equations and also different sets of free variables. the relatively co...
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Soils are generally classified according to their grain size distribution. Although primitive, sieve analysis is still the test of choice for geotechnical engineers because of its easy implementation and widely availa...
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Present paper is devoted to the specific aspects of the numerical simulation of the aerodynamics of buildings and structures, which shape is similar to a rectangular cylinder (e.g., bridges, high-rise buildings etc.) ...
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ISBN:
(纸本)9788494284472
Present paper is devoted to the specific aspects of the numerical simulation of the aerodynamics of buildings and structures, which shape is similar to a rectangular cylinder (e.g., bridges, high-rise buildings etc.) for obtaining authentic transient wind loads on them using Computational Fluid Dynamic (CFD) technologies. Comparison between the wind tunnel experimental data and the results of numerical simulation using LES and DES approaches was carried out. Specific aspects, rules and recommendations for the numerical simulation of civil engineering structures with cross sectional shape close to a rectangular were developed.
this paper presents consolidation analyses of the foundation soil for the construction of a state road embankment near the city of Krapina in Croatia. there are two clay layers of low permeability and high compressibi...
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Various constitutive models have been proposed to describe cyclic behaviors of soil. three different models are investigated in this paper. the bounding surface model MIT-E3, mixed hardening model MFMH-3 and an empiri...
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In this paper, an adaptive dynamic relaxation technique is proposed as an efficient method for large scale nonlinear geotechnical problems. Dynamic relaxation is a numerical method to solve static problems involving h...
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ISBN:
(纸本)9788494284472
In this paper, an adaptive dynamic relaxation technique is proposed as an efficient method for large scale nonlinear geotechnical problems. Dynamic relaxation is a numerical method to solve static problems involving highly nonlinear differential equations. Extremely simple implementation and cheap computation resulting from the underlying explicit time integration scheme make this method an attractive candidate for large scale problems. However, for highly nonlinear problems it may require large number of iterations. As a remedy, an adaptive time stepping approach is proposed to deal with changes in stiffness due to nonlinearity. Moreover, the proposed algorithm is incorporated within a 2D and 3D finite element code where analytical solution of the local governing equations, as well as global expression of the strain-displacement matrix, is utilized in order to compensate the slow convergence and enhance the performance of the algorithm. the efficiency of the proposed algorithm is verified by presenting some numerical results from 2D and 3D elastoplastic analysis of bearing capacity of circular footing with von Mises plasticity model. the results show that apart from a competitive performance for a multiple load increment procedure, this approach is capable of providing a good approximation of the failure load in a single load step.
In this paper a model is proposed to capture the volume change dependency of soil-water characteristic curve based on energy considerations invoking the existence of generalized elastic and plastic potentials. the new...
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Obtaining reliable predictions of the settlement of shallow foundations on sand remains a challenging task for the geotechnicalengineering profession. there appears to be no widely accepted method for this very commo...
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Deep excavations below groundwater level are generally exposed to hydraulic failure of the subsoil or an impervious construction. In some cases the failure mechanism cannot be predicted exactly because of its mechanic...
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