Details
Original language | English |
---|---|
Pages (from-to) | 975-994 |
Number of pages | 20 |
Journal | Indian Geotechnical Journal |
Volume | 53 |
Issue number | 5 |
Early online date | 10 Apr 2023 |
Publication status | Published - Oct 2023 |
Abstract
The Zefta Barrage is a vital hydraulic structure situated on the Damietta branch of the Nile River. This research mainly aims to evaluate the liquefaction potential under the Zefta Barrage and the associated damage. A range of field and laboratory tests are used to estimate soil parameters in order to construct a two-dimensional finite element model. The probabilistic seismic hazard approach (PSHA) is used to estimate the ground-motion parameters of the operating basis earthquake (OBE) and the maximum design earthquake (MDE) at the Zefta Barrage site considering local site conditions. The obtained response spectra are implemented in the spectral matching methodology to acquire reasonable time histories. The current analysis reveals that the structure is stable against liquefaction for the OBE, but the concrete blocks downstream need an extension to keep the structure a way off the liquefiable zone. On the other hand, for MDE, the downstream part of the structure is affected by liquefaction at the end of the downstream raft. This liquefaction is caused by a layer of liquefied sand occurring at a depth equal to 0.33 m. It is found that the barrage downstream needs limited strengthening to overcome the liquefaction effects.
Keywords
- Hydraulic structure, Liquefaction, PSHA, Two-dimensional finite element analysis, UBC3D-PLM model
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Geotechnical Engineering and Engineering Geology
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In: Indian Geotechnical Journal, Vol. 53, No. 5, 10.2023, p. 975-994.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Liquefaction Assessment of Zefta Barrage in Egypt
AU - Khair, Amany
AU - El-Hadidy, Mahmoud
AU - ELMashad, Mohie Eldin
AU - El-Ashaal, Ashraf
AU - Abdel-Rahman, Khalid
AU - El-Mossallamy, Yasser
PY - 2023/10
Y1 - 2023/10
N2 - The Zefta Barrage is a vital hydraulic structure situated on the Damietta branch of the Nile River. This research mainly aims to evaluate the liquefaction potential under the Zefta Barrage and the associated damage. A range of field and laboratory tests are used to estimate soil parameters in order to construct a two-dimensional finite element model. The probabilistic seismic hazard approach (PSHA) is used to estimate the ground-motion parameters of the operating basis earthquake (OBE) and the maximum design earthquake (MDE) at the Zefta Barrage site considering local site conditions. The obtained response spectra are implemented in the spectral matching methodology to acquire reasonable time histories. The current analysis reveals that the structure is stable against liquefaction for the OBE, but the concrete blocks downstream need an extension to keep the structure a way off the liquefiable zone. On the other hand, for MDE, the downstream part of the structure is affected by liquefaction at the end of the downstream raft. This liquefaction is caused by a layer of liquefied sand occurring at a depth equal to 0.33 m. It is found that the barrage downstream needs limited strengthening to overcome the liquefaction effects.
AB - The Zefta Barrage is a vital hydraulic structure situated on the Damietta branch of the Nile River. This research mainly aims to evaluate the liquefaction potential under the Zefta Barrage and the associated damage. A range of field and laboratory tests are used to estimate soil parameters in order to construct a two-dimensional finite element model. The probabilistic seismic hazard approach (PSHA) is used to estimate the ground-motion parameters of the operating basis earthquake (OBE) and the maximum design earthquake (MDE) at the Zefta Barrage site considering local site conditions. The obtained response spectra are implemented in the spectral matching methodology to acquire reasonable time histories. The current analysis reveals that the structure is stable against liquefaction for the OBE, but the concrete blocks downstream need an extension to keep the structure a way off the liquefiable zone. On the other hand, for MDE, the downstream part of the structure is affected by liquefaction at the end of the downstream raft. This liquefaction is caused by a layer of liquefied sand occurring at a depth equal to 0.33 m. It is found that the barrage downstream needs limited strengthening to overcome the liquefaction effects.
KW - Hydraulic structure
KW - Liquefaction
KW - PSHA
KW - Two-dimensional finite element analysis
KW - UBC3D-PLM model
UR - http://www.scopus.com/inward/record.url?scp=85152444710&partnerID=8YFLogxK
U2 - 10.1007/s40098-023-00714-7
DO - 10.1007/s40098-023-00714-7
M3 - Article
AN - SCOPUS:85152444710
VL - 53
SP - 975
EP - 994
JO - Indian Geotechnical Journal
JF - Indian Geotechnical Journal
SN - 0971-9555
IS - 5
ER -