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- Title
STATIC AND DYNAMIC RESPONSE LOAD COMPUTATION OWN AN UNDERGROUND CONSTRUCTION.
- Authors
Flavy, Ritziu William
- Abstract
It's a real railway tunnel, with 26.17 m of rock above, in the length of 128 m at an altitude of 1000 m in the Carpathians Mountain. The computation model is represented by bidirectional finite elements, considering a plain deformation. Lateral and under the tunnel we considered 5 tunnel diameters of the rock of the mountain. Above the tunnel I took just 26.17 m. So, our model is 63*56 m. Based on the model above, the computer program SAP2000-V14, gave the static and self-dynamic response of the nodal displacement and unit efforts. The output is for the entire model or most representative points of interest of the model. Not the absolute values are important but the relationships between the values are more significant. The output contains a number of nodal displacements, unit efforts, diagrams. The maximum displacement is on the vertical direction in the amount of 5.3 cm because of self weight of the tunnel and 0.02 cm because of the convoy (train). More consideration of the output of the program for the static considerations in the conclusions of the article. For the self dynamic response, there were determined 11 modes of vibrations, with a participation of 95 % of the modal mass. See the diagrams. So, the output determined that for the specified T: T1=0.407 s, modal mass is y=0.65973 a vertical translation, a rigid behavior. T2=0.326 s, modal mass is x=0.83512, an horizontal translation, T3=0.282 s, is a torsion.
- Subjects
RAILROAD tunnels; UNDERGROUND construction industry; STRAINS &; stresses (Mechanics); FINITE element method; MOUNTAINS
- Publication
Annals of the University of Petrosani Mining Engineering, 2012, Vol 13, p101
- ISSN
1454-9174
- Publication type
Article