Jiawei Xu 교수

Abstract Centrifuge model tests on slopes subject to shaking and rainfall have been performed to examine the response of slopes with shaking-induced cracks to subsequent rainfall and evaluate the corresponding landslide-triggering mechanisms. The failure pattern of the slope subject to shaking and then rainfall was found different from that of the slope subject to only rainfall. When shaking caused cracks on the slope shoulder and rupture line below, the mobilized soil slid along the slip surfac

Slope is susceptible to rainfall-induced failure after being damaged by earthquake. In this study, the seepage and deformation of unsaturated slope during post-earthquake rainfall were investigated using the finite element method. Shaking-induced plastic modulus reduction dependent on deviatoric strain and shaking-induced permeability change dependent on volumetric strain were considered in the modeling of slope response to the following rainfall; the damage concept was adopted to describe shaki

Slopes are likely to fail in areas with frequent rainfall and earthquakes. The deformation characteristics of unsaturated slopes subjected to post-rainfall earthquakes are investigated using centrifuge model tests and finite element analyses. Three tests of the slope deformation under earthquake and post-rainfall earthquakes are first studied using image analysis techniques. Then, based on an elastoplastic constitutive model, numerical simulations are carried out using the finite element method

The lateral earth pressure on a rigid retaining wall with different movement modes, of translation, rotation about the top with translation, and rotation about the base with translation, is investigated analytically in this study using a trigonometric model to describe the relation between lateral earth pressure and wall displacement. The piecewise sine function defining the passive and active earth pressures satisfies the actual major features of the lateral earth pressure–displacement curve. V

Abstract This paper mainly discusses the dynamics of poroelastic media using the finite element analysis based on the u ‐ v ‐ p full formulation, where , , and p denote the solid displacement, relative fluid velocity with respect to solid velocity, and pore fluid pressure. It incorporates the effect of relative fluid acceleration with respect to solid acceleration on soil dynamic response. The ‐‐ p formulation is first verified through the comparison with the analytical solution. After that, the

Stability of slopes where water was accumulated at the toe area during dynamic events were studied in this paper. The soil below and right above water level tended to be contractile and loose due to water storage at the toe of slope, and the slope behaviors became different compared with those without water storage. Several model tests in a geotechnical centrifuge were carried out in this paper to examine the effects of water accumulation at slope toe, relative density of soil, and shaking inten