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of Itasca software (FLAC3D, 3DEC, PFC3D, and PFC2D) are now operable. The calculated result shows that the displacement of WenXiang tunnel locating on the line of ZhengZhou-Xi’an Railway High-speed can be well controlled by adopting the excavation method of layering excavation at vertical direction and section excavation at longitudinal direction, which makes the safety of serviceability state of extension of expressway and the operation of Railway High-speed. This forum is where the product manager will discuss interesting topics relating. The adjustment was calculated as if the zone was fully saturated. In the profile plot, usually displacement of the invert arch is less than that of the vault, and affected by the mutual position of topography and excavation, the maximum displacement, 6.3mm, merges at 50m of the vault in the profile plot in the cross-section plot, due to occurrence of unloading effect brought by overlying excavation, tunnel structure has the tendency of rising toward the excavation. FLAC3D Fixed a bug in the fluid/mechanical coupling calculation of the mechanical pressure correction for volumetric strain in unsaturated zones. In this paper, from two aspects, the deformation of profile and cross-section, serviceability state is analyzed in detail. The above results provide a reliable basis for the future research on the dynamic response of caisson foundation.Ībstract: Based on the typical adjacent project of extension of LianHuo expressway which is constructed on WenXiang tunnel, the finite difference software, Flac3D, is adopted to stimulate the process of the construction. Looked from the overall,the anti-seismic property of the caisson foundation is good. We sure the bond of the caisson foundation bottom and the below soil layer is firm and the relative displacement is only 1.3 mm. Through the analysis on these curves, we know the maximum values of the acceleration, the velocity and the displacement of the top portion of the caisson foundation are 393.6 cm/s 2, 75.9 cm/s, 28.5 cm, and the maximum rotation angle of the caisson foundation is 0.08°. In the Python interpreter inside FLAC3D and PFC3D the functionality of this module is available in the itasca.util module. We also obtain the rotation angle time-history curve and the relative displacement time-history curve of two key points at the bottom of the caisson foundation.
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By applying the horizontal (x direction) seismic waves at the bottom of the model, we simulate the earthquake action to the caisson foundation and the soil body around it and obtain the time-history curves of the acceleration, the velocity and the displacement of the key points in the model in x direction. RE: Finite Difference vs.Abstract: Based on the software FLAC3D, we set up the dynamic calculation model. What the benefits of the software you mention are, I don't know, as all of the features mentioned are covered in most FE codes, unless it's modelling some phenomena not covered by FE methods which I can't see. It used to be commonly used in fluid dynamic methods mainly because of its stability, I believe, but FE methods are now used. Schematic of numerical model concomitant with seismic analysis of soil-foundation-superstructure system, having adopted soil constitutive models, viz, isotropic Elastic with Hysteretic Damping (E-HD), elastic-perfectly plastic Mohr-Coulomb with Hysteretic Damping (MC-HD), and Hyperbolic Hardening with Hysteretic Damping (H2-HD), conducted in FLAC3D, subjected to scaled 1999 Chi-Chi earthquake. In short, for most purposes dynamic versus static. For a dynamic solution, FLAC3D uses real grid-point masses and physically realistic damping. For static analysis, additional damping and mass scaling are introduced to facilitate the process of approaching the static equilibrium.
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#Flac3d frume full#
The benefits of FD methods are that it is easy to understand, easy to explain, easy to program, meshing is simple, and the error is known in terms of the remainder from the Taylor series expansion of the derivatives. FLAC3D uses the full equations of motion in its solution process.
![flac3d frume flac3d frume](https://i.ytimg.com/vi/u2XGCIOkxGs/mqdefault.jpg)
Finite Differencing methods are thus less robust for irregular shaped bodies than finite element methods which divide the region into separate elements to fit the region and use a variational approach to solving the PDE. Abstract Since the beginning of the 21st century,with the development of the country’s economy,high-rise cities have been building and transportation construction has gradually developed underground.The construction of underground transportation is increasingly inseparable from the support of the subway. For this method it is important that a uniform grid is applied over the region to reduce the errors by the differencing method. Finite Difference methods apply a grid over the region and solve the Partial Differential Equation by approximating the derivatives via the Taylor series expansion and using differences as an approximation.