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Study on the Behavior of Under Ground Intersection Subjected to Earthquake Loads

Arami, Abbasali | 2009

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  1. Type of Document: M.Sc. Thesis
  2. Language: English
  3. Document No: 39414 (53)
  4. University: Sharif University of Technology, International Campus, Kish Island
  5. Department: Science and Engineering
  6. Advisor(s): Sadaghiani, Mohammad Hossein
  7. Abstract:
  8. With the popular choice of using underground structures and tunnel in big cities and with significant damage in recent large earthquake; therefore more attention is given to the behavior of the underground structure in seismic area. The purpose of this thesis is to present the Soil-Tunnel-Structure Interaction analysis performed for different dynamic load condition. Therefore we modeled a 3D intersection part of two different tunnels in homogeneous soil by ABAQUS software. The soil and concrete structure of tunnel is modeled by three dimensional solid finite elements and the boundary of soil is modeled by three dimensional infinite elements with 8 nodes. The results demonstrate the geostatic loading and dynamic response of soil-tunnel system and relative displacement and interaction stresses between soil and structure in the intersection part of tunnels. The purpose of this thesis is to present the Soil-Tunnel-Structure Interaction analysis performed for different dynamic load condition. In this study, we modeled intersection part of tunnels in homogeneous soil in earthquake. Three records of Tabas Earthquake (1978, Iran) at each direction (X, Y and Z) is selected for analysis the system of soil-tunnel. The Tabas Earthquake was capable of generating a peak horizontal(X-direction) ground acceleration of 0.82g, and vertical(Y-direction) ground accelerations in excess of 0.6g and Z-direction ground acceleration of 0.84g. Response-spectrum-compatible ground motion time histories were developed along the tunnel alignment. The objectives of the analysis are to estimate the responses of intersection part of tunnels behavior due to 3 seismic excitations. The result of sensitivity case is illustrated
  9. Keywords:
  10. Underground Structures ; Finite Element Method ; Earthquake ; Interaction ; Tunnels

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