Akademik Veri Yönetim Sistemi
International IDU Engineering Symposium – IES’20 , Trabzon, Türkiye, 5 - 13 Aralık 2020, cilt.1, sa.1, ss.1-10
Arch dams have delicate sections thanks to their curvature. The fact
that these dams are large, costly and construction takes many years increases
the importance of the structure. Mistakes and / or accidents that may occur
during the construction of such structures may occur major loss of life and
property. Considering the volumes, masses and slenderness of arch dams, they
can be significantly affected by dynamic forces such as changing water
pressure, temperature, wind and earthquakes. The level of these effects and to
what extent they affect the dam can be determined by the analysis to be made to
finite element model created by computer. Since Finite Element Analysis is
based on certain assumptions, the results obtained should be compared and / or
verified with the results obtained by experimental methods. One of the most
suitable methods preferred in many engineering structures is the experimental
modal analysis method. Within the scope of the study, experimental vibration
tests were carried out in order to evaluate and determine the structural
behavior of the double curvature Deriner Arch Dam, which has a body height of
249m and a crest length of 720m. Experimental measurements were carried out
with accelerometers placed in appropriate places in order to obtain the mode
shapes of the dam. The dynamic characteristics of the dam were determined using
OMA software. The first seven natural frequencies of the Deriner arch dam were
obtained in the range 1.60-4.10Hz. As a result of the negotiations with the DSI
26th Regional Directorate, the acceleration data obtained from the existing
accelerometer system of the dam was instantly taken and a continuous monitoring
process was initiated. This data was transferred to the web-based monitoring
site and a structural condition monitoring platform was created.