| Autor: |
Kitsis, Vasileios, Athanasopoulos, George, Zekkos, Dimitrios |
| Předmět: |
|
| Zdroj: |
Geotechnical & Geological Engineering; Jul2024, Vol. 42 Issue 5, p4129-4152, 24p |
| Abstrakt: |
The seismic behavior of earth retaining structures continues to remain a critical consideration in engineering design and lessons learned from the full-scale performance of retaining walls during earthquakes are invaluable. The observed performance of several retaining walls in the area affected by the 2014 Cephalonia, Greece, earthquakes is presented. Subsequently, the case of measured kinematic response (i.e. residual seismic movements) of a 6.0 m high concrete gravity-type "retaining wall-backfill" system, which displaced during the earthquake, but remained functional is presented. The recording of a strong motion station—located at a distance of less than 200 m from the wall—was used to describe the horizontal earthquake ground excitation. The inertial response of the "wall-backfill" system was analyzed through a finite element numerical model based on in-situ shear wave velocity measurements and values of mechanical soil properties back-calculated from the measured kinematic response of the system to the particular earthquake. The selection of soil material values of stiffness and strength was based on the results of post-earthquake Vs-depth measurements at the wall site. The measured kinematic response of the "wall-backfill" system was compared to predictions of several published empirical relations. The empirical relations were all found to overpredict the observed displacements and in some cases, significantly. The derived numerical model of the "wall-backfill" system was subsequently used to investigate (a) the magnitude and distribution of seismic earth pressures on the wall as well as the backfill settlements, and (b) the beneficial phase difference developed between the peak values of wall inertia and active earthquake thrust increment during the particular earthquake event. The results of this case history agree well with previously published results concerning the inertial response (seismic earth pressures and phasing issues) for walls retaining cohesionless and cohesive backfills. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
Full text from SpringerLink