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Structural Engineering and Mechanics Volume 91, Number 2, July25 2024 , pages 123-133 DOI: https://doi.org/10.12989/sem.2024.91.2.123 |
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A parametric investigation on seismic performance of ageing Sariyar dam |
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Ahmad Yamin Rasa and Ahmet Budak
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| Abstract | ||
| The assessment of seismic behavior and seismic performance of ageing Sariyar concrete gravity dam constructed on Sakarya River in Türkiye is the main focus of this paper. For this purpose, the impact of sediment domain, ageing of concrete material under the impact of chemical and mechanical actions, and dam-water-sediment interaction are included in the twodimensional (2D) finite element (FE) model developed in FORTRAN 90 environment. In the FE model, the dam and age dependent sediment domains are modeled by solid elements, while reservoir domain is modeled by Lagrangian fluid elements. The radiation of reflected waves to the unbounded water domain is modeled by infinite Lagrangian fluid elements, while unbounded sediment domain is modeled by infinite solid elements. The coupled system was assumed to be under the simultaneous impact of Vertical (V) and Horizontal (H) ingredients of 1976 Koyna earthquake and the coupled system was analyzed in Laplace domain by direct method. Due to the deterioration of the concrete, the H and V displacement responses together with the fundamental period of the body, elongate throughout the lifetime and this reduce the seismic safety of the dam. It was deduced that the ageing dam body will not experience major damages under the Koyna earthquake both at the earlier and later ages. Furthermore, at the heel of the dam, the hydrodynamic pressure responses are decreased by rising the sediment domain depth. | ||
| Key Words | ||
| Ageing Sariyar Dam; dam-reservoir-sediment interaction; Lagrangian approach; seismic performance assessment | ||
| Address | ||
| Ahmad Yamin Rasa and Ahmet Budak: Department of Civil Engineering, Engineering Faculty, Atatürk University, 25240 Erzurum, Turkey | ||