Canadian Dam Association Bulletin - Fall 2016 - 31

4-node tetrahedron elements (C3D4). The general material properties were taken as specified before. The Poisson ratio was taken as 0.2. The CDP option was used to define the behavior of concrete in the nonlinear range, since it was the only appropriate and available model. The concrete 'Part' is considered as nonlinear plastic concrete structure. The dimensions and layout of the concrete part are modeled as shown in the construction drawings. Figure 5 shows the concrete part of the model. Figure 4: Top and bottom anchor bar parts 4.1 Reinforcement and Anchor Bars In ABAQUS, reinforcement in RC structures is typically provided by means of rebars, which are onedimensional members that can be defined singly or embedded in the concrete members. Rebars are defined with the 'REBAR' option. They are typically used with metal plasticity models to describe the behavior of the rebar material and are superposed on a mesh of the elements that are used to model the concrete. With this modeling approach, the concrete behavior is considered independent of the rebar. Effects associated with the rebar/concrete interface, such as bond slip, is approximated by introducing 'tension stiffening' into the concrete modeling to simulate load transfer across cracks through the rebar. TABLE 1 LOADS DUE TO UNIT COMPONENTS The anchor bars 'Part' was defined using the properties of the actual reinforcement used in the construction of the substructure at that time. The anchor bars connecting the top and bottom speed rings to the concrete were then modeled and arranged similar to those of the actual construction as per construction drawings as shown in Figure 4. However, due to considerable complexity of the model and very lengthy running time, the model part involving the interaction of the anchor bars and concrete were disabled and not evaluated in the analytical studies. 4.2 Concrete Substructure Due to the complicated geometry of the concrete structure, the concrete structure was meshed using three-dimensional solid - stress/displacement as the stiffness of the bedrock is very high. Both sides of the concrete part were restrained against horizontal movement in the longitudinal direction. Furthermore, the FEA that was done previously assumed that the dam is restrained to expand longitudinally (Danay 2000). Figure 5: Substructure concrete part Canadian Dam Association * Fall 2016 Unit components Number of plates Weight (kN) Stator plates 8 1517 Lower bracket plates 8 5854 Turbine - 569 TABLE 2 WATER ELEVATIONS Elevation (m) Maximum head water 177.7 Minimum head water 173.16 Maximum tail water 156.12 Minimum tail water 149.99 In order to mesh the concrete part, the part was first divided into different regions using 'Partition' tool. Then the critical regions such as the regions near the speed rings were discretized into finer mesh than the mesh used for less critical regions such as upstream and downstream sides of the substructure. The part was meshed into elements of approximately 1000 mm. The bottom part of the concrete at the concrete bedrock interface was restrained against horizontal and vertical movements to prevent the horizontal and vertical movements at the founding elevation. This boundary condition was found to be reasonable 31

Table of Contents for the Digital Edition of Canadian Dam Association Bulletin - Fall 2016

Board of Directors
Board of Directors Nominations
Remedial Work at Lake Major Dam
CDA Conference Report: Otto Holden Generating Station Alkali-Aggregate Reaction Investigation
DSR Bulletin
Icold Corner
Notice of Annual General Meeting
Call for Papers, 2017 Conference
Young Professional Activities
Buyers’ Guide and Trade List
Canadian Dam Association Bulletin - Fall 2016 - cover1
Canadian Dam Association Bulletin - Fall 2016 - cover2
Canadian Dam Association Bulletin - Fall 2016 - 3
Canadian Dam Association Bulletin - Fall 2016 - 4
Canadian Dam Association Bulletin - Fall 2016 - 5
Canadian Dam Association Bulletin - Fall 2016 - 6
Canadian Dam Association Bulletin - Fall 2016 - Board of Directors
Canadian Dam Association Bulletin - Fall 2016 - 8
Canadian Dam Association Bulletin - Fall 2016 - Board of Directors Nominations
Canadian Dam Association Bulletin - Fall 2016 - Remedial Work at Lake Major Dam
Canadian Dam Association Bulletin - Fall 2016 - 11
Canadian Dam Association Bulletin - Fall 2016 - 12
Canadian Dam Association Bulletin - Fall 2016 - 13
Canadian Dam Association Bulletin - Fall 2016 - 14
Canadian Dam Association Bulletin - Fall 2016 - 15
Canadian Dam Association Bulletin - Fall 2016 - 16
Canadian Dam Association Bulletin - Fall 2016 - 17
Canadian Dam Association Bulletin - Fall 2016 - 18
Canadian Dam Association Bulletin - Fall 2016 - 19
Canadian Dam Association Bulletin - Fall 2016 - 20
Canadian Dam Association Bulletin - Fall 2016 - 21
Canadian Dam Association Bulletin - Fall 2016 - 22
Canadian Dam Association Bulletin - Fall 2016 - 23
Canadian Dam Association Bulletin - Fall 2016 - 24
Canadian Dam Association Bulletin - Fall 2016 - 25
Canadian Dam Association Bulletin - Fall 2016 - CDA Conference Report: Otto Holden Generating Station Alkali-Aggregate Reaction Investigation
Canadian Dam Association Bulletin - Fall 2016 - 27
Canadian Dam Association Bulletin - Fall 2016 - 28
Canadian Dam Association Bulletin - Fall 2016 - 29
Canadian Dam Association Bulletin - Fall 2016 - 30
Canadian Dam Association Bulletin - Fall 2016 - 31
Canadian Dam Association Bulletin - Fall 2016 - 32
Canadian Dam Association Bulletin - Fall 2016 - 33
Canadian Dam Association Bulletin - Fall 2016 - 34
Canadian Dam Association Bulletin - Fall 2016 - 35
Canadian Dam Association Bulletin - Fall 2016 - 36
Canadian Dam Association Bulletin - Fall 2016 - 37
Canadian Dam Association Bulletin - Fall 2016 - DSR Bulletin
Canadian Dam Association Bulletin - Fall 2016 - Icold Corner
Canadian Dam Association Bulletin - Fall 2016 - 40
Canadian Dam Association Bulletin - Fall 2016 - Notice of Annual General Meeting
Canadian Dam Association Bulletin - Fall 2016 - Call for Papers, 2017 Conference
Canadian Dam Association Bulletin - Fall 2016 - 43
Canadian Dam Association Bulletin - Fall 2016 - Young Professional Activities
Canadian Dam Association Bulletin - Fall 2016 - Buyers’ Guide and Trade List
Canadian Dam Association Bulletin - Fall 2016 - 46
Canadian Dam Association Bulletin - Fall 2016 - cover3
Canadian Dam Association Bulletin - Fall 2016 - cover4
Canadian Dam Association Bulletin - Fall 2016 - outsert1
Canadian Dam Association Bulletin - Fall 2016 - outsert2
Canadian Dam Association Bulletin - Fall 2016 - outsert3
Canadian Dam Association Bulletin - Fall 2016 - outsert4
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