Proceedings of the
8th International Symposium on Geotechnical Safety and Risk (ISGSR)
14 – 16 December 2022, Newcastle, Australia
Editors: Jinsong Huang, D.V. Griffiths, Shui-Hua Jiang, Anna Giacomini, Richard Kelly
doi:10.3850/978-981-18-5182-7_06-007-cd
Seismic Performance Analysis and Anti-Seismic Measures for High Concrete Face Rockfill Dam Based on Stochastic Dynamic Theory
1Faculty of Infrastructure Engineering, School of Hydraulic Engineering, Dalian University of Technology, Dalian 116024, China.
2State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China.
ABSTRACT
Concrete face slab is the main anti-seepage component of high concrete face rockfill dams (CFRDs), so it is of great significance to restrain the seismic cracking of concrete face slab. This paper selects horizontal joints as the main anti-seismic measures to suppress concrete face slab cracking. Multiple groups of seismic ground motions are generated based on spectral expression-random function non-stationary model. The seismic performance of CFRDs with horizontal joints is evaluated based on stochastic dynamic theory. This paper evaluates the anti-seismic performance of horizontal joints along with the dam height and dam axis. In addition, the tensile stress of the typical element selected is calculated before and after setting horizontal joints based on the generalized probability density evolution method (GPDEM). The results show that the application of horizontal joints will significantly reduce the tensile stress along the slope of the concrete face slab under the random ground motions to effectively restrain the seismic cracking of the concrete face slab.
Keywords: high concrete face rockfill dams, concrete face slab, anti-seismic measures, horizontal joints, stochastic dynamic theory, generalized probability density evolution method.
