本研究規劃以園區內之既有地表設施進行減振成效分析,所採用之減振設施,主要係以剛性道路舖面以及貫穿園區內之大洲排水溝渠為主。在分析中採用有限元素分析軟體ABAQUS,以二維平面應變元素進行頻率域分析。根據分析結果顯示,各方向之減振效果與所採用減振設施系統之配置,以及於該方向上之勁度成正比。採用道路舖面者,減振效果有限;而採大洲排水溝渠者,應設法提升構件之勁度,以防止彎矩力造成之影響。由於高鐵列車通過時,所造成之顯著振動頻率約在1.5Hz~ 5.5Hz左右,並以水平面上與列車行進方向垂直之方向所造成之振動量為最大,因此若針對此方向進行減振,採用將大洲排水溝渠設置於與橋墩相連道路舖面後之形式者,具有相當不錯之減振效果。
In this study, we use the numerical simulation for the studies of ground vibration mitigation. The finite element program ABAQUS is selected for a plane strain analysis. The road pavements and the Da-Jhou ditch in TSIP are the facilities considered for reducing ground vibration. The results show that the effects of reducing ground vibration are proportional to the stiffness of the mitigation facilities. If we choose the method by using the road pavement, only, to reduce the vibration, the result is limited; if we choose the other one, using the Da-Jhou ditch, we have to increase the stiffness of this ditch to restrict the deformation of the ditch. The main frequency of the high speed train running through TSIP is about 1.5Hz~ 5.5Hz, and the maximum vibration is perpendicular to the direction of the railway. As the result, the best way to reduce the vibration in the perpendicular direction is to use the road pavement followed by the Da-Jhou ditch.