TY - GEN
T1 - Effects of Rock Layering on Dynamic Response of a Gravity Dam
AU - Yunwei, Dan
AU - Atefi-Monfared, Kamelia
AU - Basaran, Cemal
N1 - Publisher Copyright:
© 2019 American Society of Civil Engineers.
PY - 2019
Y1 - 2019
N2 - Dam-foundation interaction under seismic loading remains a challenging topic. Many factors affect the dynamic response of a dam system during an earthquake. Two governing parameters include type of the foundation rock and layering of the supporting geological media. Finite element methods have been proven to be effective techniques for evaluating dam-foundation interactions. Previous finite element based studies have assessed the dynamic response of a given concrete gravity dam located on a rigid or a monolith viscoelastic half foundation. The current study presents a new finite element based numerical model developed to assess the dynamic response of an earth dam system supported by a multi-layered rock foundation during an earthquake. The Pine Flat gravity dam was adopted as a case study, and the Taft earthquake data (1952) was utilized to replicate the ground motion. The conventional Mohr-Coulomb plasticity model has been adopted for characterization of the constitutive response of the layered rock foundation system. Several case scenarios have been simulated to assess effects of rock type and layering on the dynamic response of the dam system. Various nodes have been selected on the dam crest as well as within the geological medium, in which displacements, stresses, deformations, and potential energy have been physically monitored. The most critical case scenario is identified based on which design recommendations are made.
AB - Dam-foundation interaction under seismic loading remains a challenging topic. Many factors affect the dynamic response of a dam system during an earthquake. Two governing parameters include type of the foundation rock and layering of the supporting geological media. Finite element methods have been proven to be effective techniques for evaluating dam-foundation interactions. Previous finite element based studies have assessed the dynamic response of a given concrete gravity dam located on a rigid or a monolith viscoelastic half foundation. The current study presents a new finite element based numerical model developed to assess the dynamic response of an earth dam system supported by a multi-layered rock foundation during an earthquake. The Pine Flat gravity dam was adopted as a case study, and the Taft earthquake data (1952) was utilized to replicate the ground motion. The conventional Mohr-Coulomb plasticity model has been adopted for characterization of the constitutive response of the layered rock foundation system. Several case scenarios have been simulated to assess effects of rock type and layering on the dynamic response of the dam system. Various nodes have been selected on the dam crest as well as within the geological medium, in which displacements, stresses, deformations, and potential energy have been physically monitored. The most critical case scenario is identified based on which design recommendations are made.
UR - https://www.scopus.com/pages/publications/85063456288
U2 - 10.1061/9780784482100.028
DO - 10.1061/9780784482100.028
M3 - Conference contribution
AN - SCOPUS:85063456288
SN - 9780784482100
T3 - Geotechnical Special Publication
SP - 275
EP - 284
BT - Geotechnical Special Publication
A2 - Meehan, Christopher L.
A2 - Kumar, Sanjeev
A2 - Pando, Miguel A.
A2 - Coe, Joseph T.
PB - American Society of Civil Engineers (ASCE)
T2 - 8th International Conference on Case Histories in Geotechnical Engineering: Earthquake Engineering and Soil Dynamics, Geo-Congress 2019
Y2 - 24 March 2019 through 27 March 2019
ER -