The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Piles are widely used in civil engineering, there exist many analysis method to study the stress and displacement of pile and soil, but due to the complicated interaction between them, the insitu test and analytical analysis show some limitation. So it is necessary to find some other methods to solve this problem. Due to the rapid advances in computer technology and sustained development, numerical...
A finite element model is established to study the shear dilatancy effect of anchorage interface. The study shows that the maximum shear stress of anchorage interface increases with the increase of dilatancy degree of interface and shear dilatancy effect obviously improves shear stress of anchorage interface. Radial stress is generated nearby interface layer due to shear dilatancy and radial stress...
One problem when modelling soil compaction is the estimation of vertical stress distribution at the soil surface, as it is non-uniform and mainly depends on soil properties. However, a uniform vertical stress distribution is used in most FEM compaction models. A new processing approach is proposed to numerically model vertical stress distribution at the soil surface, employing the FEM models of PLAXIS...
Pull-out test of cable is an important test to obtain some useful parameters for geotechnical engineering. In order to numerical simulate the pull-out tests of cable to study the mechanical deformation characteristic of soil and cable, the numerical software FLAC3D is used to simulate the procedure of cable being pulled out. After calculation, the mechanical characteristic of cable, response of soil...
Rock-soil aggregate (RSA) is a kind of special geo-engineering material which is widely distributed in China. Discontinuity and heterogeneity are the main characteristics represented by RSA because of its internal complicated structure. PFC (particle flow code) 3D from Itasca is employed for the numerical study of RSA based on discrete element method (DEM) because of its obvious discontinuity. A new...
Frozen soil is multi-phrase compound material which contains many holes and defects, and its fracture failure process has the same nonlinear characteristic as rock and concrete. This paper presented a cementation stress crack model for automatic simulation of discrete crack propagation in frozen soil. The discrete crack was modeled on the basis of the cementation stress crack concept using nonlinear...
Simplified mechanical model can not reflect the real situation of the interaction between foundation and cables. Then numerical software FLAC3D is used to simulate the procedure of foundation excavation and cable reinforcement. Deformation responses of foundation are analyzed as well as the mechanical response of cables. The results show that, (1) the procedure of excavation leads to the deformation...
Permanent ground deformation (PGD) caused by earthquake is a significant hazard for buried pipelines. A new concept of damage mitigation for buried pipelines subject to PGD is proposed. Expand polystyrene (EPS) geofoam is used as flexible material to wrap pipelines. While the fault moving, EPS geofoam provide more compressive deformation than the soil and pipeline, thus the deformation and damage...
Shear stress-strain model of unsaturated soil plays an important role in its constitutive law, and it is very interesting and not well solved. In this paper, deficiency of traditional hyperbolic model for unsaturated soil shear stress-strain relationship is analyzed by employing half-value-strength index (HVSI). A new model with 3 parameters for unsaturated soil shear stress-strain relationship is...
A contactless inspection method based on digital image processing technique is introduced to improve measurement of specimen deformation in triaxial test of geomaterials. Based on this method, a series of conventional triaxial compression tests under different stress paths are investigated. Then an elastoplastic constitutive model of soil is acquired through the numerical method of modeling constitutive...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.