Ground motion scaling for the prediction of the seismic response of concrete gravity dams

Duygu, Mustafa Berk
Designing dams for seismic safety gains importance as the number of dams are increasing as a result of increasing need in water storage and hydropower. To define a structure’s seismic safety, scaling of accelerograms should be considered as one of the most crucial elements. Appropriate scaling of ground motion records is required to better estimate the linear and nonlinear structural response of a structure. Although, in literature, there exist numerous methods dealing with this issue, it is required to determine the most suitable ones for designing concrete gravity dams. In this study, in order to compare the effectiveness of different ground motion scaling procedures, four different ground motion scaling procedures were used. The scaling methods used in this thesis are namely, non-stationary spectral matching, scaling for ASCE-7-10, scaling of records to arithmetic mean of maximum incremental velocity and Modal Pushover Based Scaling. The two dimensional Concrete Gravity Dam models are analyzed by utilizing non-linear dynamic analyses for the selected and scaled records.


Performance of concrete gravity dams under earthquake effects
Soysal, Berat Feyza; Arıcı, Yalın; Department of Civil Engineering (2014)
Concerns about the seismic safety of gravity dams have increased with the construction of numerous new dams in the developing world as well as the need for the evaluation of existing dam stock in the developed countries. The common procedure for the design of concrete gravity dams has been linear analyses: there is scant experience on the design of such systems using nonlinear analyses as the post-linear behavior and performance limits of gravity dam monoliths are not well known. This study is focused on th...
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...
A Study on optimum layout of drainage gallery for concrete dams
Daghestani, Tameem; Yanmaz, Ali Melih; Çalamak, Melih; Department of Civil Engineering (2018)
Dams are generally massive structures retaining a large amount of water. Any failure could lead to a disaster. Therefore, keeping the dam within the required safety margins and maintaining those conditions is of the utmost importance. A gravity dam is held in place by its own weight. Uplift pressure reduces the effective weight of the dam, thus reducing its safety. Hence reducing the effect of uplift could have significant results in increasing the safety of the dam. In this study, the optimum location of t...
Seismic testing of a scaled roller-compacted-concrete gravity dam
Gharibdoust, Ali; Binici, Barış; Department of Civil Engineering (2016)
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 name...
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...
Citation Formats
M. B. Duygu, “Ground motion scaling for the prediction of the seismic response of concrete gravity dams,” M.S. - Master of Science, Middle East Technical University, 2014.