| Author | Nguyen Trong Nghia |
| Call Number | AIT Thesis no.GE-08-04 |
| Subject(s) | Concrete dams--Earthquake effects--Simulation methods
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| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Geotechnical and Geoenvironmental Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. GE-08-04 |
| Abstract | This study deals with 2D and 3D nonlinear seismic damage analysis of a concrete gravity dam by using the finite element program ABAQUS and the concrete damaged plasticity model. Four different cases of the spillway section of the proposed dam are simulated to. compare 2D and 3D analyses with the assumption of rigid foundation. First the frequency analysis is conducted to compare the fundamental frequency and estimate the value of damping coefficient for the time analysis. Then the seismic analysis is conducted using the simulated ground acceleration motion. The time history of relative displacement between the crest and base of the dam is obtained and compared for the maximum value and occurrence time. The tensile damage distributions over the dam at specific time instants during the period of the ground motion are obtained to examine initiation and evolution of the damage. The numerical results show that the plane-stress assumption gives similar results of maximum relative displacement and final damage distribution with 3D analysis, but different in the natural frequency and the occurrence times of first crack, second crack and maximum relative displacement. Secondly, the effect of low foundation modulus is also investigated by 2D plane stress model and the same procedure. Three different values of rock foundation modulus are chosen. The numerical results show that: as the rock deformation modulus decrease, the relative displacement of the dam base to the crest increases, and the damage/crack distributions transfer from the neck part to the heel part of the dam |
| Year | 2009 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. GE-08-04 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Geotechnical Engineering (GE) |
| Chairperson(s) | Kyung - Ho Park; |
| Examination Committee(s) | Bergado, Dennes T.;Noppadol Phien - wej; |
| Scholarship Donor(s) | The Netherlands; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2009 |