Three Dimensional Numerical Simulation of Immersed Tunnel Seismic Response Based on Elastic-Plastic FEM

2004 ◽  
Vol 274-276 ◽  
pp. 661-666 ◽  
Author(s):  
Xian Long Jin ◽  
Yi Zhi Guo ◽  
Jun Hong Ding
Keyword(s):  
Numerical Simulation ◽  
Seismic Response ◽  
Three Dimensional ◽  
Elastic Plastic ◽  
Immersed Tunnel

Three Dimensional Elastic-Plastic Numerical Simulation of Tunnel Excavation Sequence of Dalian Speed Railway

2012 ◽  
Vol 170-173 ◽  
pp. 1474-1478
Author(s):  
An Nan Jiang ◽  
Hong Wei Yang ◽  
Hong Fu Xin ◽  
Bing Bai
Keyword(s):  
Numerical Simulation ◽  
Damage Zone ◽  
Three Dimensional ◽  
Ground Surface ◽  
Soft Rock ◽  
Vertical Displacement ◽  
Stability Control ◽  
Surrounding Rock ◽  
Railway Tunnel ◽  
Elastic Plastic

Dalian speed railway tunnel is located in complex soft rock and soil, the road foundation deform and surrounding rock stability control is a concern problem. Along with the unloading process of excavation, surrounding rock moving to inner hole, while exceeding the elastic limitation, the plastic deform and the surrounding rock destroy then occurred. The paper adopted three dimensional elastic-plastic method based on Mohr-Coulomb yielding criterion and carried out numerical simulation of excavation process, in order to analyze and compare the surrounding rock vertical displacement contour, ground surface settlement and damage zone corresponding to different construction sequence. The elastic-plastic numerical method can reflect the damage and destroy character of nonlinear soil material of surrounding rock corresponding to different construction scheme, the simulation result has active guiding meaning for the Dalian speed railway tunnel construction design and dynamic analysis.

Numerical simulation for large-scale seismic response analysis of immersed tunnel

2006 ◽  
Vol 28 (10) ◽  
pp. 1367-1377 ◽  
Author(s):  
Jun-Hong Ding ◽  
Xian-Long Jin ◽  
Yi-Zhi Guo ◽  
Gen-Guo Li
Keyword(s):  
Numerical Simulation ◽  
Seismic Response ◽  
Large Scale ◽  
Response Analysis ◽  
Seismic Response Analysis ◽  
Immersed Tunnel

Dynamic Buckling Simulation of Cylindrical Liquid Storage Tanks Subjected to Seismic Motions

2010 ◽  
Author(s):  
Akira Maekawa ◽  
Katsuhisa Fujita
Keyword(s):  
Numerical Simulation ◽  
Seismic Response ◽  
Large Deformation ◽  
Three Dimensional ◽  
Mesh Size ◽  
Buckling Analysis ◽  
Dynamic Buckling ◽  
Storage Tanks ◽  
Analysis Method ◽  
Liquid Storage

A three-dimensional and elastic-plastic dynamic buckling analysis method that takes into consideration fluid-structure coupling and large deformation is proposed in order to accurately simulate the seismic response of cylindrical liquid storage tanks. The results of a dynamic buckling experiment of a tank using seismic motions closely match those of numerical simulation by the proposed method. The mesh size of the analytical model greatly influences the buckling analysis results. Optimization of the size is also discussed.

Study on Macroseismic Response of an Special-Shape Concrete-Filled-Steel-Tube Arch Bridge

2014 ◽  
Vol 711 ◽  
pp. 454-460 ◽  
Author(s):  
Guo Ping Huang
Keyword(s):  
Seismic Response ◽  
Seismic Waves ◽  
Three Dimensional ◽  
Steel Tube ◽  
Finite Element Models ◽  
Special Shape ◽  
Arch Bridge ◽  
Concrete Filled Steel Tube ◽  
Elastic Plastic ◽  
Processing Modes

It is extremely complex for the seismic response of special-shape Concrete-filled-steel-tube arch bridge under severe earthquake, mainly in: the structure may enter elastic-plastic working state and nonlinear border, etc., with regards to this, the elastic-plastic beams unit of concrete-filled-steel-tube is introduced, using different boundary processing modes and establishing three different Midas finite element models. According to the second-level requirements of seismic probability level, regarding the artificial seismic waves as seismic input wave, it is carried out the three-dimensional seismic response of arch bridge. The results is showed that it have not yet entered elastic-plastic work scope for structure under E2 action of earthquake and the special-shape concrete-filled-steel-tube arch bridge is with the features of light deadweight and good seismic behavior.

scholarly journals Three-Dimensional Nonlinear Seismic Response of Immersed Tunnel in Horizontally Layered Site under Obliquely Incident SV Waves

2019 ◽  
Vol 2019 ◽  
pp. 1-17
Author(s):  
Xiaojie Zhou ◽  
Qinghua Liang ◽  
Yueyu Zhang ◽  
Zhongxian Liu ◽  
Ying He
Keyword(s):  
Seismic Response ◽  
Seismic Waves ◽  
Dynamic Stiffness ◽  
Soil Layer ◽  
Three Dimensional ◽  
Equivalent Linearization ◽  
Nonlinear Seismic Response ◽  
Obliquely Incident ◽  
Immersed Tunnel ◽  
Shear Keys

A three-dimensional (3D) detailed numerical model of an immersed tunnel in a horizontally layered site is established in this study. The 3D seismic response of the immersed tunnel in a horizontally layered site subjected to obliquely incident waves is analyzed based on the precise dynamic stiffness matrix of the soil layer and half-space via combined viscous-spring boundary and equivalent node stress methods. The nonlinear effects of external and internal site conditions on the whole model were determined by equivalent linearization algorithm and Mohr–Coulomb model, respectively. The proposed model was then applied to investigate the nonlinear seismic response of an immersed tunnel in the Haihe River subjected to seismic waves of oblique incidence. The dislocation (opening) of pipe joints in the immersed tunnel were analyzed to determine the response characteristics of the shear keys and overall displacement of the tunnel; the dynamic responses of the immersed tunnel subjected to obliquely incident seismic waves markedly differ from those of vertically incident seismic SV waves. The maximum stress value of shear keys and the maximum dislocation of the pipe joint appear as upon critical angle. The overall displacement of the tunnel increases as incident angle increases. Under severe earthquake conditions, both the pipe corners and midspan section of the roof and floor are likely to produce crack. These areas need careful consideration in the seismic design of immersed tunnel structures.

Numerical Simulation for Three Dimensional Elastic-Plastic Contact with Hardening Behavior

2005 ◽  
Vol 127 (3) ◽  
pp. 494-502 ◽  
Author(s):  
Fan Wang ◽  
Leon M. Keer
Keyword(s):  
Numerical Simulation ◽  
Finite Element Method ◽  
Residual Stress ◽  
Three Dimensional ◽  
The Finite Element Method ◽  
Elastic Plastic ◽  
Hardening Behavior ◽  
Indentation Tests ◽  
Convergence Method ◽  
Computation Speed

An elastic-plastic contact (EPC) solution and code is developed using a modified semi-analytical method. The indentation tests with different hardening behavior are simulated by using the developed EPC code. The distributions of contact pressure, residual stress and plastic strain are obtained and compared with the results of the finite element method models without hardening. Some techniques, such as fast Fourier transform and fast convergence method, are used to increase the computation speed.

Sign in / Sign up

Export Citation Format

Share Document