Seismic testing of a scaled roller-compacted-concrete gravity dam

Date

2016

Author

Gharibdoust, Ali

Metadata

Show full item record

Item Usage Stats

202
views

0
downloads

Within the last half-century, seismic response analysis of concrete gravity dams has been extensively studied. Studies reveal that two types of failure modes prevail in the form of dam body cracking or base slide. The literature lacks the conditions that clearly differentiate the two failure types. In this context a state of the art single degree of freedom pseudo-dynamic testing was developed to assess the gravity dam response on smooth foundation interface. Three different hazard levels of earthquake namely, Operational base earthquake (OBE), Maximum design earthquake (MDE) and Maximum characteristic earthquake (MCE) were employed during the course of the study. Subsequently a pushover test was performed to identify the reserve capacity of the scaled dam and its failure mode. The test results demonstrated the tendency of the scaled dam specimen to slide during MCE ground motion and eventually fail due to the rigid body sliding during the pushover test. A comparison was made between tip displacement and base slip acquired from the test and those values obtained from sliding analysis developed by Chopra and Zhang (1991b). Results were found to be in agreement and confirmed the approach by Chopra and Zhang (1991b). Finally thevi results were compared with the results from a companion specimen tested by Aldemir et al. (2015), which had a rough dam-foundation interface. It was found that base roughness is detrimental in defining the final failure mode of dams.

Subject Keywords

Dams., Gravity dams., Concrete dams., Earthquake resistant design.

URI

http://etd.lib.metu.edu.tr/upload/12620531/index.pdf
https://hdl.handle.net/11511/25926

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Quantitative comparison of 2D and 3D modeling for concrete gravity dams Evliya, Ekin Erdem; Arıcı, Yalın; Department of Civil Engineering (2014) Seismic behavior of gravity dams has long been evaluated and predicted using a representative 2D monolith for the dam. Formulated for the gravity dams built in wide-canyons, the assumption is nevertheless utilized extensively for almost all concrete dams due to the established procedures in 2D space as well as the expected computational costs of building a three dimensional model. A significant number of roller compacted concrete dams are being designed based on these procedures regardless of the valley dim...
3d modeling and ground motion scaling for the prediction of seismic demands on the gravity dams Bybordiani, Milad; Arıcı, Yalın; Department of Civil Engineering (2016) Seismic behavior of gravity dams has long been evaluated using the classical two dimensional modeling approach and time history analyses the assumptions for which have been rarely challenged. Formulated for the gravity dams built in wide-canyons, 2D modeling is utilized extensively for almost all concrete dams due to the established procedures as well as the expected computational costs of a three dimensional model. However, a significant number of roller compacted concrete (RCC) dams, characterized as such...
Seismic Performance Evaluation of Concrete Gravity Dams by Using Pseudo Dynamic Testing and Simulations Aldemir, Alper; Binici, Barış (null; 2017-11-24) Dams are one of the mostimportantinfrastructure components servingfor water storage and energyproduction.Experimental studies on the seismic response of concrete gravity dams are scarce due to the complications regarding thelargescaleof dams and their interaction with the reservoir. This study presents the results of recent novel pseudo-dynamic dam tests (PSD) along with the nonlinear finite element simulations of the specimens. The test specimens were 1/75 scaled version of the highest ...
Analysis Methods for the Investigation of the Seismic Response of Concrete Dams Aldemir, Alper; Yilmazturk, Sema Melek; Yucel, Ali Riza; Binici, Barış; Arıcı, Yalın; Akman, Altug (2015-01-01) The consideratiOn of the dam-foundation-reservoir interaction is extremely important for estimating the seismic response of concrete gravity dams. Moreover, nonlinear analysis may be required for determining the possible risk associated with dams. In order to address these issues, DSI recently published the "Guidelines for Seismic Design of Concrete Dams". Authors who have contributed to the preparation of this document provide a perspective on the seismic safety/design of concrete dams and structural analy...
Seismic assessment of a monolithic RCC gravity dam including three dimensional dam-foundation-reservoir interaction Yilmazturk, Sema Melek; Arıcı, Yalın; Binici, Barış (2015-10-01) In this study, the seismic response of a tall roller compacted concrete gravity dam located in a highly seismic zone is investigated. The response of this monolithic RCC gravity dam is examined by conducting analyses including three dimensional dam-reservoir-foundation interaction. The effect of the foundation/structure moduli ratio, material damping, and bottom absorption and reservoir compressibility on the performance of the dam were investigated. Selection of an optimal downstream slope was discussed ba...

Citation Formats

A. Gharibdoust, “Seismic testing of a scaled roller-compacted-concrete gravity dam,” M.S. - Master of Science, Middle East Technical University, 2016.