Showing papers by "Jian Zhao published in 2004"

TL;DR: In this paper, the effect of stress-history input (SHI) and velocity history input (VHI) on wave propagation and wave attenuation in jointed rock masses was studied.

TL;DR: In this article, a 3D extension of a static relaxation method for modeling large displacement of jointed rock masses is presented, and two illustrative examples are computed to verify the new formulation and to demonstrate the ability of the 3D model.

TL;DR: In this paper, the authors compared the ground behaviour predicted by two simple and practical numerical solutions to simulate the reinforcing effect of the Umbrella Arch and investigated the behaviour of the ground when this pre-support method is used in tunnelling in weak and shallow ground.

TL;DR: By using the spectrum analysis of ANSYS, the stableness of tunnel surrounding rocks was studied in this paper and the character of tensile stress and displacement were obtained in different rock quality, span and type of earthquake waves.