چکیده:
Due to the importance and diversity of tunnel designing, design of tunnel linings has been widely investigated so far. In the present paper, using (ABAQUS) for modeling tunnel under seismic and frequency load. The result of this study shows displacement and von-mises stress increase when the pressure load increase. All of models are capable to be resistant under earthquake load. The maximum displacement is about 500 mm for lining tunnel without soil structure interaction. Moreover, increasing the pressure load led to a little increase in dynamic response of the lining.
خلاصه ماشینی:
"The result of this study shows displacement and von-mises stress increase when the pressure load increase.
In this study, 2D FDM software FLAC 2D was employed for modeling and investigating the effects of excavations on existing tunnels in sand layer.
Karakus et al study on the effects of different tunnel face advance excavation on the settlement by abacus software [4].
Manouchehrian et al in 2017 studied on the rock burst in tunnels subjected to static and dynamic loads, in this study , the modeling leads to confirm that the presence of geological structures in the vicinity of deep excavations could be one of the major influence factors for the occurrence of rock burst [7].
Results presentation Figure3, displacement counter for tunneling are effective in dynamic analysis.
Connections and interaction model Mesh model and assign proper structural elements suitable component The definition of analysis steps Create boundary conditions and loading In Figures 5 related to lining models with a height of 6.
(رجوع شود به تصویر صفحه) Figure 13 Effect of pressure load on the displacement In the present research ,two ways are applied on this tunnel, frequecy and lateral loading that caused to increase of created tension in tunnel .
(رجوع شود به تصویر صفحه) Figue 16 Effect of 60 KN pressure load on the von misses stress5- Conclusion ABACUS has ability to model tunnel performance under seismic and pressure load."