A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Research and innovation: Seismic performance of various geocell earth-retention systems
This article provides an overview of the research where the use of geocells as an earth-retention structure was explored. The objective of the study was to quantify a reasonable reduction factor (RF) on the peak ground acceleration (PGA) for geocells retention structures. Reduced factors can then be integrated with well-established limit equilibrium (LE) analysis to conduct seismic and static design. A shake table testing program was executed at the Japan National Research Institute of Agricultural Engineering. The Kobe earthquake was used as a reference as it was significant in terms of damage to slopes and walls, thus qualifying it to serve as a good reference for calibrating the reduction factor and the seismic coefficient. Tests results are compared with a pseudostatic limit equilibrium analysis. The predicted failure mechanisms are similar to those observed in the tested geocell retention systems. The seismic coefficients required to produce failure in the analysis were much smaller than the actual peak value obtained in the tests. For the geocell gravity wall, the seismic reduction factor, RFs, needed to render failure is about 0.4. For geocell reinforced retention systems RFs is about 0.3. The tests reported herein are relevant to short-term performance when considering the utilized HDPE geocell. However, without improvement, HDPE geomembranes are not suitable for long-term applications. Problems of durability related to leaching of additives, oxidation, and to UV exposed facing, and other factors should be addressed.
Research and innovation: Seismic performance of various geocell earth-retention systems
This article provides an overview of the research where the use of geocells as an earth-retention structure was explored. The objective of the study was to quantify a reasonable reduction factor (RF) on the peak ground acceleration (PGA) for geocells retention structures. Reduced factors can then be integrated with well-established limit equilibrium (LE) analysis to conduct seismic and static design. A shake table testing program was executed at the Japan National Research Institute of Agricultural Engineering. The Kobe earthquake was used as a reference as it was significant in terms of damage to slopes and walls, thus qualifying it to serve as a good reference for calibrating the reduction factor and the seismic coefficient. Tests results are compared with a pseudostatic limit equilibrium analysis. The predicted failure mechanisms are similar to those observed in the tested geocell retention systems. The seismic coefficients required to produce failure in the analysis were much smaller than the actual peak value obtained in the tests. For the geocell gravity wall, the seismic reduction factor, RFs, needed to render failure is about 0.4. For geocell reinforced retention systems RFs is about 0.3. The tests reported herein are relevant to short-term performance when considering the utilized HDPE geocell. However, without improvement, HDPE geomembranes are not suitable for long-term applications. Problems of durability related to leaching of additives, oxidation, and to UV exposed facing, and other factors should be addressed.
Research and innovation: Seismic performance of various geocell earth-retention systems
Forschung und Innovation: Seismisches Verhalten von verschiedenen Boden-Rückhaltesystemen mit Geozellen
Leshchinsky, Dov (author)
Geosynthetics ; 27 ; 46-54
2009
8 Seiten, 11 Bilder, 3 Tabellen, 6 Quellen
Article (Journal)
English
Equivalent seismic coefficient in geocell retention systems
| Tema Archive | 2009
Equivalent seismic coefficient in geocell retention systems
| Online Contents | 2009
Equivalent seismic coefficient in geocell retention systems
| Online Contents | 2009