3D Analyses of Open Trench Barriers Filled with Water

This study uses three-dimensional time-domain finite-element analyses to study the isolation efficiency of open trenches filled with various levels of water. The trench is generated along the X direction, the trench thickness is in the Y direction, and negative gravity is in the Z direction. First, the finite-element model is validated by using field experiments for a full water trench with results in good agreement. A parametric study from finite-element analyses indicates that the efficiency of the water trench is similar to or sometimes better than that of the open trench for X- and Z-direction waves. However, the water trench is not efficient for isolating the Y-direction wave, because the Y-direction wave passing through the water trench is similar to a compressive wave that is difficult to reduce in water.

[1]  K. Bathe,et al.  Analysis of fluid-structure interactions. a direct symmetric coupled formulation based on the fluid velocity potential , 1985 .

[2]  P. K. Banerjee,et al.  Advanced application of bem to wave barriers in multi-layered three-dimensional soil media , 1988 .

[3]  Ioannis Vardoulakis,et al.  Vibration isolation using open or filled trenches Part 2: 3-D homogeneous soil , 1990 .

[4]  S. Ahmad,et al.  Active isolation of machine foundations by in-filled trench barriers , 1996 .

[5]  S. Ahmad,et al.  Investigation on active isolation of machine foundations by open trenches , 1996 .

[6]  Ralf Klein,et al.  Efficient 3D modelling of vibration isolation by open trenches , 1997 .

[7]  Demosthenes Polyzos,et al.  Vibration isolation by a row of piles using a 3‐D frequency domain BEM , 1999 .

[8]  Shen-Haw Ju,et al.  Time‐dependent absorbing boundary conditions for elastic wave propagation , 2001 .

[9]  Yeong-Bin Yang,et al.  Reduction of train-induced vibrations on adjacent buildings , 2001 .

[10]  R. K. Shrivastava,et al.  Response of soil media due to impulse loads and isolation using trenches , 2002 .

[11]  S. H. Ju,et al.  Three-Dimensional Analyses of Wave Barriers for Reduction of Train-Induced Vibrations , 2004 .

[12]  Yeong-Bin Yang,et al.  Wave barriers for reduction of train-induced vibrations in soils , 2004 .

[13]  Shen-Haw Ju,et al.  Reduction of vibrations due to foundation slabs , 2006 .

[14]  Shen-Haw Ju,et al.  Determining Rayleigh damping parameters of soils for finite element analysis , 2007 .

[15]  Cesare Comina,et al.  Surface Wave Tests for Vibration Mitigation Studies , 2007 .

[16]  Anders Karlström,et al.  Efficiency of trenches along railways for trains moving at sub-or supersonic speeds , 2007 .

[17]  Jian-Guo Wang,et al.  Numerical investigation on active isolation of ground shock by soft porous layers , 2009 .

[18]  Najib Bouaanani,et al.  Assessment of potential-based fluid finite elements for seismic analysis of dam-reservoir systems , 2009 .