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［ 26］ YU X，KONG X，ZOU D，et al . Linear elastic and plastic-damage analyses of a concrete cut-off wall constructed
in deep overburden［J］. Computers and Geotechnics，2015，69：462-473 .
［ 27］ YU Xiang，ZOU Degao，KONG Xianjing，et al . Large-deformation finite element analysis of the interaction be⁃
tween concrete cut-off walls and high-plasticity clay in an earth core dam［J］. Engineering Computations，2017，
34（4）：1126-1148 .
［ 28］ 余翔，孔宪京，邹德高，等 . 覆盖层中混凝土防渗墙的三维河谷效应机制及损伤特性［J］. 水利学报，2019，
50（9）：1123-1134 .
［ 29］ LEE J，FENVES G L . A plastic-damage concrete model for earthquake analysis of dams［J］. Earthquake Engi⁃
neering & Structural Dynamics，1998，27（9）：37-56 .
［ 30］ XU B，ZOU D，KONG X，et al . Dynamic damage evaluation on the slabs of the concrete faced rockfill dam with
the plastic-damage model［J］. Computers and Geotechnics，2015，65：258-265
［ 31］ ZHANG G，ZHANG J M，YU Y . Modeling of gravelly soil with multiple lithologic components and its application
［J］. Soils and Foundations，2007，47（4）：799-810 .
［ 32］ ZHANG G，ZHANG J M . Numerical modeling of soil-structure interface of a concrete-faced rockfill dam［J］.
Computers and Geotechnics，2009，36（5）：762-772 .
［ 33］ CHEN Y，HU R，LU W，et al . Modeling coupled processes of non-steady seepage flow and non-linear deforma⁃
tion for a concrete-faced rockfill dam［J］. Computers & Structures，2011，89（13）：1333-1351 .
［ 34］ KARSAN I D，JIRSA J O . Behaviour of concrete under compressive loadings［J］. Journal of the Structural Divi⁃
sion ASCE，1969，95（12）：2535-2563 .
［ 35］ KUPFER H，HILSDORF H K，RUSCH H . Behaviour of concrete under biaxial stresses［J］. ACI Journal Proceed⁃
ings，1969，66（8）：656-666 .
［ 36］ GOPALARATNAM V S，SHAH S P . Softening response of plain concrete in direct tension［J］. ACI Journal Pro⁃
ceedings，1985，82（3）：310-323 .

Numerical analysis of plastic damage of concrete cutoff wall for concrete face rockfill dam

WEN Lifeng，LI Yanlong，CHAI Junrui
（State Key Laboratory of Eco-hydraulics in Northwest Arid Region，Xi’an University of Technology，Xi’an 710048，China）

Abstract：Under the action of dam filling and reservoir impoundment，the working and stress conditions of
the cutoff wall are complicated，which may cause plastic strain and wall cracking. This paper combines the
measured data and numerical analysis to study the stress， deformation and damage behaviour of the cutoff
wall of a concrete faced rockfill dam. Based on the analysis of the stress and deformation characteristics of
the cutoff wall on the basis of measured data，the plastic damage model of concrete is used to establish a
three-dimensional numerical model for the mechanical behaviour of the cutoff wall. The numerical model
considers seepage-stress coupling effect of the dam and foundation and the contact effect between the cutoff
wall and the overburden， and truly simulates the process of dam filling and reservoir storage. The numeri⁃
cal calculation model is verified by the measurement data. The force mechanism and its stress deformation
and damage cracking characteristics are deeply analyzed combining with the measurement data and numeri⁃
cal results. The effect of the seepage-stress coupling effect of the dam and foundation， wall position， and
wall material on the mechanical behaviour of the cutoff wall is discussed. The research results have guiding
significance for the construction and structural safety control of cutoff walls of concrete face rockfill dams.
Keywords： concrete cutoff wall； stress and deformation； damage characteristics； numerical analysis； influ⁃
encing factors

（责任编辑：王冰伟）

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