Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
Seismic performance evaluation of roller compacted concrete gravity dams by pseudo dynamic testing
Download
index.pdf
Date
2016
Author
Aldemir, Alper
Metadata
Show full item record
Item Usage Stats
312
views
210
downloads
Cite This
The energy demands throughout the world have reached a level that could create irreversible impacts on the environment unless an overall energy policy to reduce the energy production relying on fossil fuels is implemented. The apparent effects of global warming enforced countries to take precautions and to set limits on the fossil fuel consumption. Thus, the renewable energy sources like hydropower, solar energy, biomass, etc. have, nowadays, been encouraged to generate electricity. Certainly, dams are excellent options to generate energy from renewable sources. Yet, they also supply fresh water for dwelling or agricultural usage. Unfortunately, the seismic behavior of dam structures has not been unveiled yet due to the complications stemmed from the interaction of dams with their surrounding media, i.e. flexible foundation and water in reservoir, and due to the complex valley geometries, which requires the consideration of higher mode effects. To solve the complex interaction of dam structures, numerous finite element modeling strategies along with special boundary elements have been proposed in literature. However, the experimental works on dams are constrained with a limited number of shake table experiments. Therefore, in this dissertation, a methodology to adapt pseudo dynamic testing scheme to gravity dam structures is generated. Firstly, the numerical background on the applicability of pseudo dynamic test to distributed mass system is introduced. Then, this methodology is applied to three different specimens consisting of one conventional concrete (CVC) and two roller-compacted concrete (RCC) with different compressive strengths. The prototype specimen was selected as Melen Dam, the highest RCC dam designed in Turkey and the laboratory specimens have a scale factor of 1/75. Each specimen was tested under the effect of three different hazard level earthquakes consecutively. After the completion of earthquake tests, the capacity curve of each specimen was obtained from a pushover experiment. The experiments show that there were no base sliding and stability problems under the effect of each hazard level for none of the specimens. However, the failure of the second specimen (RCC15) was observed during the pushover experiment caused by a body crack reaching the downstream toe of the specimen. Secondly, the numerical ability of current advanced finite element techniques to estimate both the overall demand criteria like base shear, tip displacement, etc. and the crack propagations was investigated. In this part, two different strategies were utilized to model the boundary conditions of the dam specimen. In the first method, the base of the dam specimen was modeled as fixed base and base springs were placed under the foundation block of the dam specimen in the second method. The results reveal that no method was successful enough to predict the correct crack pattern of the dam specimens. However, both methods were convincing for estimating the overall demand parameters. Therefore, it is suggested that the overall demand parameters should be utilized while designing the concrete gravity dams.
Subject Keywords
Dams.
,
Gravity dams.
,
Concrete dams.
,
Earthquake resistant design.
URI
http://etd.lib.metu.edu.tr/upload/12620238/index.pdf
https://hdl.handle.net/11511/26107
Collections
Graduate School of Natural and Applied Sciences, Thesis
Suggestions
OpenMETU
Core
Seismic analysis of concrete gravity dams including damfoundation-reservoir interaction
Yücel, Ali Rıza; Binici, Barış; Department of Civil Engineering (2013)
The attractiveness of the hydroelectric power as a domestic, clean and renewable energy source increased with the rise of the energy demand within the last decade. In this context, concrete gravity dam construction gained a high momentum. Use of roller compacted concrete as a dam construction material became popular due to advantages such as reducing the construction duration and costs. Concrete gravity dams are special type of structures which requires an extensive care for their seismic analysis and desig...
Three dimensional dynamic response of a concrete gravity dam
Yılmaztürk, Sema Melek; Binici, Barış; Arıcı, Yalın; Department of Civil Engineering (2013)
Hydroelectric power is a commonly used alternative source of energy in developing countries. In this regard, concrete gravity dams are the most preferred dam type especially with the developments in the engineering industry. Roller compacted concrete became more popular in dam construction due to its advantages of speed and economy. Several methods are used for the design of concrete gravity dams by analyzing the dam response under static and dynamic loads. This study provides three dimensional linear dynam...
Smart Solar Micro-grid Using ZigBee and Related Security Challenges
Qadir, Zakria; Tafadzwa, Vincent; Rashid, Haroon; Batunlu, Canras (2018-11-02)
Renewable energy is needed to preserve a sustainable environment. One particular form of renewable energy (solar energy) is one of the most important and cost-effective solutions to the energy crisis. In this study, efficient solar energy management using ZigBee technology shall he discussed. The system informs the user when solar panels produce excess power before supplying it to the surrounding users, thus making the supplier a prosumer instead of a consumer. GSM which is used to monitor energy usage over...
Optimum daily operation of a wind-hydro hybrid system
Ercan, Eray; Kentel Erdoğan, Elçin (2022-06-01)
© 2022 Elsevier LtdDue to the negative effects of fossil fuels on the environment and health, energy supply is shifting towards renewables. The integration of renewable energy systems is challenging due to the intermittent nature of renewables, however this can be mitigated through storage. Uncertainty in electricity prices in spot markets further complicates the operation of these systems. Pumped storage hydropower is currently the most viable form of large-scale energy storage, and operation of renewable ...
Life cycle assessment of two different renewable energy systems for a selected region: Bozcaada island
Şentürk, Ayşe Eylül; Oğuz, Elif (2020-01-01)
Energy production without destroying the environment has been one of the most crucial issues for the people living in today'sworld. In order to analyse whole environmental impacts of energy production process, life cycle assessment (LCA) is widely used. In this study, two distinct renewable energy systems are assessed. First, a land-based wind farm which has been operating in Bozcaada Island since 2000 compared with a proposed solar photovoltaic power plant in terms of Energy Pay-Back Time (EPBT) periods an...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
A. Aldemir, “Seismic performance evaluation of roller compacted concrete gravity dams by pseudo dynamic testing,” Ph.D. - Doctoral Program, Middle East Technical University, 2016.