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Jian Zhao

Cette personne n’est plus à l’EPFL

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Publications associées (155)

A 3D distinct lattice spring model for elasticity and dynamic failure

Jiannong Fang, Jian Zhao, Gaofeng Zhao

Wiley-Blackwell2011

Parallel computation for debonding process of externally FRP plated concrete

Jian Zhao, Tao Xu

In this paper, the three dimensional Parallel Realistic Failure Process Analysis (RFPA(3D)-Parallel) code based on micromechanical model is employed to investigate the bonding behavior in FRP sheet bonded to concrete in single shear test. In the model, the ...

2011

Stress wave interaction with a nonlinear and slippery rock joint

Jian Zhao

2011

Normally Incident Wave Propagation across One Joint Set with Virtual Wave Source Method

Jian Zhao, Jianbo Zhu, Gaofeng Zhao

This paper presents an analytical study on normally incident wave propagation across a joint set. Combined with the displacement discontinuity method (DDM), the virtual wave source method (VWSM) is adopted to take account of multiple wave reflections among ...

Elsevier2011

A new hard rock TBM performance prediction model for project planning

Jian Zhao

Among the models used for performance prediction of hard rock tunnel boring machines two stand out and are often used in the industry. They include the semi theoretical model by Colorado School of Mines and the empirical model by Norwegian University of Sc ...

Elsevier2011

Theoretical Methods for Wave Propagation across Jointed Rock Masses

Jian Zhao, Jianbo Zhu

Different methods are presently available for the analysis of wave propagation across jointed rock masses with the consideration of multiple wave reflections between joints. These methods can be divided into two categories. One is based on the displacement ...

Springer Verlag2010

Dynamic fracturing simulation of brittle material using the distinct lattice spring method with a full rate-dependent cohesive law

Jian Zhao, Tohid Kazerani, Gaofeng Zhao

A full rate-dependent cohesive law is implemented in the distinct lattice spring method (DLSM) to investigate the dynamic fracturing behavior of brittle materials. Both the spring ultimate deformation and spring strength are dependent on the spring deforma ...

Springer Vienna2010

An equivalent viscoelastic model for rock mass with parallel joints

Jian Zhao

An equivalent viscoelastic medium model is proposed for rock mass with parallel joints. A concept of "virtual wave source (VWS)'' is proposed to take into account the wave reflections between the joints. The equivalent model can be effectively applied to a ...

2010

A NUMERICAL MANIFOLD METHOD FOR PLANE MICROPOLAR ELASTICITY

Jian Zhao, Hua Zhang, Gaofeng Zhao

A numerical manifold method (NMM) for plane micropolar elasticity is proposed in this paper to consider the microstructure influence of materials. First, the basic formulations of plane micropolar elasticity are briefly introduced. Then, the equations of s ...

2010

Micromechanical parameters in bonded particle method for modelling of brittle material failure

Jian Zhao, Tohid Kazerani

Bonded particle modelling (BPM) is nowadays being extensively used for simulating brittle material failure. In BPM, material is modelled as a dense assemblage of particles (grains) connected together by contacts (cement). This sort of modelling seriously d ...

Wiley-Blackwell2010

On the truly meshless solution of heat conduction problems in heterogeneous media

Aurèle Parriaux, Jiannong Fang, Jian Zhao, Gaofeng Zhao

A truly meshless method based on the weighted least-squares (WLS) approximation and the method of point collocation is proposed to solve heat conduction problems in heterogeneous media. It is shown that, in the case of strong heterogeneity, accurate and sm ...

2009

Analytical and numerical study of the effect of water pressure on the mechanical response of cylindrical lined tunnels in elastic and elasto-plastic porous media

Jian Zhao

2009

Development of a rock mass characteristics model for TBM penetration rate prediction

Jian Zhao

2009

Study of the solar anisotropy of cosmic ray primaries of about 200 GeV energy with the L3+C muon detector

Eduardo Sanchez, Horst Vogel, Aurelio Bay, Yu Lei, Jian Zhao, Liang Sun, Qian Wang, Zhirui Xu, Matthias Weber, Ji Hyun Kim, Werner Lustermann, Xiao Wang, Yifei Guo, Xuan Yang, Zheng Wang

Context. Primary cosmic rays experience multiple deflections in the non-uniform galactic and heliospheric magnetic fields which may generate anisotropies. Aims. A study of anisotropies in the energy range between 100 and 500 GeV is performed. This energy r ...

2008

Keynote: Rock fracturing and failure under dynamic loading

Jian Zhao

2008

Simulation of failure process of jointed rock

Jian Zhao

2008

Response by the authors to R.M. Goktan discussion to the paper: Q.M. Gong and J.Zhao (2007). Influence of rock brittleness on TBM penetration rate in Singapore granite, Tunnelling and Underground Space Technology, Vol. 22, pp. 317-324

Jian Zhao

2008

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Jian Zhao

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A 3D distinct lattice spring model for elasticity and dynamic failure

Parallel computation for debonding process of externally FRP plated concrete

Stress wave interaction with a nonlinear and slippery rock joint

Normally Incident Wave Propagation across One Joint Set with Virtual Wave Source Method

A new hard rock TBM performance prediction model for project planning

Theoretical Methods for Wave Propagation across Jointed Rock Masses

Dynamic fracturing simulation of brittle material using the distinct lattice spring method with a full rate-dependent cohesive law

An equivalent viscoelastic model for rock mass with parallel joints

A NUMERICAL MANIFOLD METHOD FOR PLANE MICROPOLAR ELASTICITY

Micromechanical parameters in bonded particle method for modelling of brittle material failure

On the truly meshless solution of heat conduction problems in heterogeneous media

Analytical and numerical study of the effect of water pressure on the mechanical response of cylindrical lined tunnels in elastic and elasto-plastic porous media

Development of a rock mass characteristics model for TBM penetration rate prediction

Study of the solar anisotropy of cosmic ray primaries of about 200 GeV energy with the L3+C muon detector

Keynote: Rock fracturing and failure under dynamic loading

Simulation of failure process of jointed rock

Response by the authors to R.M. Goktan discussion to the paper: Q.M. Gong and J.Zhao (2007). Influence of rock brittleness on TBM penetration rate in Singapore granite, Tunnelling and Underground Space Technology, Vol. 22, pp. 317-324

Influence of intermittent joint orientation on roadway stability

Model experiments on the broken zone in intermittently jointed surrounding rock

Dynamic model of fracture normal behaviour and application to prediction of stress wave attenuation across fractures