CRACKING RESPONSE OF CONCRETE GRAVITY DAMS UNDER SEISMIC LOADING
DOI:
https://doi.org/10.11113/mjce.v26.15899Keywords:
Gravity dams, concrete, dynamic analysis, fluid-structure interaction, smeared cracking modelAbstract
In this paper are presented the results obtained from a nonlinear seismic analysis of concrete gravity dams. Three dams with different heights will be studied under the effect of several earthquake ground motions. The fluid-structure interaction will be considered using the added mass concept of Westergraad is used to simulate the fluid-structure interaction with the foundation assumed to be rigid. The smeared cracking approach is used to model the initiation and propagation of cracks through the dams. The response of the dam is characterized by evaluating modal characteristics, displacements and crack patterns. The results obtained will allow having an insight into the expected behavior of concrete dams under future expected earthquakes and indicate that dynamic characteristics of a dam and the frequency content of the ground motions are a couple of the key parameters to consider when assessing the seismic safety of concrete gravity dams.References
ADINA, (2013). Version 8.2, Users Manuals. ADINA; R& D, Inc., Watertown, Massachusetts, USA.
Bhattacharjee, S.S., and Leger, P. (1995). Fracture response of gravity dams due to rise of reservoir elevation. Journal of Structural Engineering. September 1995. 1299-1305.
Cai, Q., Robberts, J.M., And Ransburg, B.W.J. (2008). Finite element fracture modeling of concrete gravity dams. Journal of the South African Institution of Civil Engineering, 50:1, 13-24.
El-Aidi, B., and Hall, J.F. (1989a). Non-linear earthquake response of concrete gravity dams, Part 1: Modeling, Earthquake Engineering and Structural Dynamics. 18, 837-851.
El-Aidi, B., and Hall, J.F. (1989b). Non-linear earthquake response of concrete gravity dams, Part II: Behavior, Earthquake Engineering and Structural Dynamics. 18, 853-865.
Mansouri, A., Neshaei, M.A.L., and Aghajany. R. (2011). Fracture analysis of concrete gravity dam under earthquake induced loads. Journal of Applied Sciences, Environment, and Management.15 (2) 317-325
Mao, M. and Taylor, C.A. (1997). Nonlinear seismic cracking analysis of medium-height
concrete gravity dams. Computers and Structures. 64:5/6, 1197-1204.
Mlakar, P. (1987). Nonlinear response of concrete gravity dams to strong earthquake-induced ground motions. Computers and Structures. 26:1,165-173.
Pal, N. (1976). Seismic cracking of concrete gravity dams. Journal of the Structural Division (ASCE). 102:9, 1827-1844.
Vergas-loli, M. And Fenves, G.L. (1989). Effects of concrete cracking on the earthquake response of gravity dams. Earthquake Engineering and Structural Dynamics. 18, 575-592.
Yamaguchi, Y., Hall, R., Sasaki, T., Matheu, E., Kanenawa, K., Chudgar, A., and Yule. D. (2004). Seismic performance evaluation of concrete gravity dams. Proceedings of the 13th World Conference on Earthquake Engineering –Vancouver, Canada.
