Abstract
3-D FE analyses were conducted on lattice-type ground improvement by in-situ cement-mixing for liquefaction mitigation during earthquakes. By using an elasto-plastic model considering post-peak strain-softening properties in shear and tensile regions, seismic performance could be evaluated more rationally. Since tensile behavior of cement-treated sand was the key issue for the seismic performance of the lattice-type ground improvement, different types of laboratory tests and their numerical simulation were also performed. It was revealed that unconfined tension tests yield reasonable estimates of the actual tensile strength. Due to effects of shear failure below the loading strip, the tensile strength is underestimated in splitting tests. On the other hand, due to effects of stress re-distribution that is induced by the strain-softening behavior in the tensile region, the tensile strength is overestimated in bending tests.
| Original language | English |
|---|---|
| Title of host publication | Geotechnical Society of Singapore - International Symposium on Ground Improvement Technologies and Case Histories, ISGI'09 |
| Pages | 257-262 |
| Number of pages | 6 |
| DOIs | |
| Publication status | Published - 2010 |
| Externally published | Yes |
| Event | International Symposium on Ground Improvement Technologies and Case Histories, ISGI'09 - Singapore Duration: 2009 Dec 9 → 2009 Dec 12 |
Other
| Other | International Symposium on Ground Improvement Technologies and Case Histories, ISGI'09 |
|---|---|
| City | Singapore |
| Period | 09/12/9 → 09/12/12 |
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Keywords
- Cement-mixing
- Lattice-type improvement
- Tensile property
ASJC Scopus subject areas
- Geotechnical Engineering and Engineering Geology
Cite this
Behavior of lattice-type ground improvement by cement-mixing for liquefaction mitigation. / Koseki, Junichi; Namikawa, Tsutomu.
Geotechnical Society of Singapore - International Symposium on Ground Improvement Technologies and Case Histories, ISGI'09. 2010. p. 257-262.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Behavior of lattice-type ground improvement by cement-mixing for liquefaction mitigation
AU - Koseki, Junichi
AU - Namikawa, Tsutomu
PY - 2010
Y1 - 2010
N2 - 3-D FE analyses were conducted on lattice-type ground improvement by in-situ cement-mixing for liquefaction mitigation during earthquakes. By using an elasto-plastic model considering post-peak strain-softening properties in shear and tensile regions, seismic performance could be evaluated more rationally. Since tensile behavior of cement-treated sand was the key issue for the seismic performance of the lattice-type ground improvement, different types of laboratory tests and their numerical simulation were also performed. It was revealed that unconfined tension tests yield reasonable estimates of the actual tensile strength. Due to effects of shear failure below the loading strip, the tensile strength is underestimated in splitting tests. On the other hand, due to effects of stress re-distribution that is induced by the strain-softening behavior in the tensile region, the tensile strength is overestimated in bending tests.
AB - 3-D FE analyses were conducted on lattice-type ground improvement by in-situ cement-mixing for liquefaction mitigation during earthquakes. By using an elasto-plastic model considering post-peak strain-softening properties in shear and tensile regions, seismic performance could be evaluated more rationally. Since tensile behavior of cement-treated sand was the key issue for the seismic performance of the lattice-type ground improvement, different types of laboratory tests and their numerical simulation were also performed. It was revealed that unconfined tension tests yield reasonable estimates of the actual tensile strength. Due to effects of shear failure below the loading strip, the tensile strength is underestimated in splitting tests. On the other hand, due to effects of stress re-distribution that is induced by the strain-softening behavior in the tensile region, the tensile strength is overestimated in bending tests.
KW - Cement-mixing
KW - Lattice-type improvement
KW - Tensile property
UR - http://www.scopus.com/inward/record.url?scp=78149396990&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=78149396990&partnerID=8YFLogxK
U2 - 10.3850/GI081
DO - 10.3850/GI081
M3 - Conference contribution
AN - SCOPUS:78149396990
SN - 9789810831240
SP - 257
EP - 262
BT - Geotechnical Society of Singapore - International Symposium on Ground Improvement Technologies and Case Histories, ISGI'09
ER -