Numerical Engineering & Consulting Services
Society of scientific calculation specialized in Civil Engineering
Soil-Structure Interaction (SSI)
Impedance of a foundation on piles
- Studied structure: 50m diameter storage tank on 380 piles
- Piles model: 3D beam elements
- Soil model: boundary elements
- Compound drive: soil/piles compound drive is performed via the Craig-Bampton methode
Objectives: Calculation of the soil-structure interaction dynamic impedances of a storage tank foundation fixed in the soil through 380 piles.
- Geometrie of the tank *
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- Mesh of the tank *
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Soil-Structure Interaction (SSI)
Lift of a hospital under seismic load
- Studied structure: hospital
- Load: earthquake in the 3 directions of space
Objectives: Calculation of the efforts in the weight-bearing elements (beams, pillars and floors) of a hospital under a seismic load considering Soil-Structure Interaction (SSI). Evaluation of the vibration shape modes of the system hospital+soil, which are the base of a linear dynamic calculation.
- First 8 vibration shape modes of the hospital *
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Soil-Structure Interaction (SSI)
Dynamic behavior of a railtrack under passing of a high speed train
- Studied structure: railtrack
- Load: passing of a high speed train
Objectives: Evaluate the maximum displacement fonction of the vibrations of the tracks (supersonic celerity) due to the passing of a high speed train.
- Description of the railtrack model *
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- Vibration shape modes *
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- Deformation *
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Soil-Structure Interaction (SSI)
Multiple interaction between buildings through the soil. Town-site effect.
- Studied structure: Roma Norte district, Mexico-city
- Model: 3D
- Buildings model: finite elements (beams, shells)
- Soil model: semi-infinite, boundary elements (BEM)
- Load: accelerograms (in the 3 directions of space) of the Michaocan earthquake recorded the 9th of september 1995
Objectives: Study the influence between the buildings on the structure dimensioning spectra.
- 3D model of the Roma Notre district, Mexico-City *
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* Examples are originaly from N. MEZHER's research studies
Seismic
Behaviour of a reinforced concrete building during an earthquake
- Studied structure: reinforced concrete building based on frameworks
- Mechanic behaviour: concrete cracking (damage mechanics), plasticity of reinforcements
- Boundary conditions: embedding at the base
- Load: acceleration time history along one direction
Objectives: Simulate an 8 story building's behavior subjected to the effects of an earthquake, following a horizontal direction. Reinforced concrete building is based on frameworks without wind bracing. Non-linear behavior of materials was taken account of in the analysis and the main objective was to estimate displacements in each floor as well as to locate the formation of plastic hinges.
- Time history displacement curve observed on the roof
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- Deflection of the building + stress results
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