A CASE STUDY ON 3D NON-LINEAR ANALYSIS OF A CLAY CORE ROCKFILL DAM

Yıl 2017, Sayı: 1, 388 - 396, 09.11.2017

Ayse Bengu Sunbul Murat Cavusli Murat Emre Kartal Fatih Sunbul

Öz

Clay
core rockfill (CCR) dams are commonly used and the chosen model dam
construction due to their low cost and rapid construction advantages; moreover
playing a key role in national water and power management systems. In terms of
large water reservoir impoundment behind a high dam, they include a risk to the
public, in case of an earthquake, especially for urban areas. Therefore, the
stability of dam embankment and analysing seismic safety is of great concern to
geotechnical engineers. In fact, these analyses are complex issues which
concern both elastic and dynamic effects on the influence of the seismic
response to real earthquake records. The objective of this study is to evaluate
the three dimensional static and dynamic degrading behaviour of a CCR dam
through using the finite difference method. The static part of the analysis
considers the layered construction, reservoir impoundment and vertical
displacements whereas, the dynamic part considers the response of the dam
to a real earthquake recording which represents the typical measures of a peak
ground acceleration (PGA) of the study area. Dams should be designed in
considering an extreme earthquake with maximum intensity values. In view of
this we have investigated the 3D non-linear seismic behaviour of a CCR dam
which was subjected to the 1999 Mw 7.1 Duzce earthquake and this is consistent
with the idea of an extreme earthquake of about maximum intensity in structural
seismic response analysis. The mechanical behavior of the dam material was
described using the Mohr–Coulomb failure criterion. Dynamic analyses of the
model are performed and the dam behaviour and possible failure phenomena
presented. Discussions and comparisons between the non-linear simulation
results and existing parameters are expressed.

Anahtar Kelimeler

3D, rockfıll dam, earthquake

Kaynakça

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