A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Seismic forces on piles
Researchers reported recently that the bending moments generated at the fixed base of a pile, or at the interface between two soil layers being stiffer than the bottom one, by the passage of seismic waves through the soil can exceed the moment at the head of the pile due to the seismic waves and the forces induced by the vibrations of the supported structure. The objective of this work was to explore under what conditions this could happen. To study the variation of the bending moments with frequency, a harmonic motion at the base rock was considered modelling a fixed pile on a single soil layer and on a soil deposit with two soil layers with different stiffness. This work also illustrates how the results under an earthquake motion would depend on the frequency content of the motion and the system's frequency content. The results confirm the researchers' premise if the ratio between the shear wave velocity of the layers is large enough.
Seismic forces on piles
Researchers reported recently that the bending moments generated at the fixed base of a pile, or at the interface between two soil layers being stiffer than the bottom one, by the passage of seismic waves through the soil can exceed the moment at the head of the pile due to the seismic waves and the forces induced by the vibrations of the supported structure. The objective of this work was to explore under what conditions this could happen. To study the variation of the bending moments with frequency, a harmonic motion at the base rock was considered modelling a fixed pile on a single soil layer and on a soil deposit with two soil layers with different stiffness. This work also illustrates how the results under an earthquake motion would depend on the frequency content of the motion and the system's frequency content. The results confirm the researchers' premise if the ratio between the shear wave velocity of the layers is large enough.
Seismic forces on piles
Olmos, Bertha A. (author) / Roesset, Jose Manuel (author)
Structure and Infrastructure Engineering ; 9 ; 1283-1298
2013-12-01
16 pages
Article (Journal)
Electronic Resource
English
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