Nonlinear seismic response analysis of arch dam-foundation systems- part I dam-foundation rock interaction |
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Authors: | Xiuli Du Yanhong Zhang Boyan Zhang |
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Institution: | (1) The Key Laboratory of Urban Security and Disaster Engineering, Ministry of Education , Beijing University of Technology, Beijing, China;(2) China Institute of Water Resources and Hydropower Research, Beijing, China |
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Abstract: | The arch dam–foundation rock dynamic interaction and the nonlinear opening and closing effects of contact joints on arch dam
are important to the seismic response analysis of arch dams. Up to date, there is not yet a reasonable and rigorous procedure
including the two factors in seismic response analysis. The methods for the analysis of arch dam–foundation rock dynamic interaction
in frequency domain are not suitable to the problem with nonlinear behaviors, in this paper, so an analysis method in time
domain is proposed by combining the explicit finite element method and the transmitting boundary, and the dynamic relaxation
technique is adopted to obtain the initial static response for dynamic analysis. Moreover, the influence of arch dam–foundation
dynamic interaction with energy dispersion on seismic response of designed Xiaowan arch dam in China is studied by comparing
the results of the proposed method and the conventional method with the massless foundation, and the local material nonlinear
and nonhomogeneous behaviors of foundation rock are also considered. The reservoir water effect is assumed as Westergaard
added mass model in calculation. The influence of the closing–opening effects of contact joints of arch dam on the seismic
response will be studied in another paper. |
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Keywords: | Arch dam Foundation Dynamic interaction Fault Nonlinear seismic response |
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