SEISMIC AND DYNAMIC DESIGN OF (UNDERGROUND) STRUCTURES
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|Features:||earthquake, vibration, dynamics|
THE CAUSES OF DYNAMIC LOADING
EARTHQUAKES AND SEISMIC ACTIVITY
An earthquake is the result of a sudden release of energy in the Earth’s crust that creates seismic waves. While most earthquakes are caused by movement of the Earth’s tectonic plates, human activity can also cause seismic activity. This induced seismicity is caused by for example mining, water and carbon dioxide storage or oil and gas extraction.
Vibrations have their influence on the integrity of structures and may in some cases have adverse effects on structures. Examples may be straightforward as the well-known vibrations caused by foundation works. Less common and more complicated problems could be (railroad)traffic induced vibrations through tunnels underpassing urban areas or even the effects of wind induced vibrations (for example by windmills).
DYNAMIC LOADING IN STRUCTURAL DESIGNS
Seismic and dynamic design of (underground) structures can be divided in two important steps.
- Step 1: Determine the possible sources and magnitudes of dynamic loading that should be translated/accounted for in the structural designs.
- Step 2: Model the dynamic soil/structure interaction to determine if the soil can bear the dynamic loading from the structure or, vice versa, the integrity of the structure is guaranteed under the seismic loads that may occur and be transferred from the soil to the structure.
Arthe has realized geotechnical and structural designs for projects in earthquake prone areas, but also for dynamically loaded structures as windmills and railroads. For projects and challenges characterized by dynamic loading, Arthe can formulate solutions.