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Date of Publication:2011-01-01

Journal:水力发电学报

Affiliation of Author(s):建设工程学部

Issue:6

Page Number:153-158,257

ISSN No.:1003-1243

Abstract:Extruding rupture of face slabs occurred on some of the built high concrete-faced rock-fill dams（CFRD）.In this paper,a three-dimensional（3-D） static and dynamic finite element（FE） method is used to analyze the axial stresses of CFRD face slabs,and the influence of compressive modulus of vertical construction joints on axial compressive stress is studied.The analysis shows that water pressure-caused friction force of face slabs points to the valley and it produces compressive stresses in most parts of face slabs.Hence the compressive stress that has a peak value at the center of valley area,dominates the dam-axial stress,and small tensile stress occurs only locally around the dam abutments.If earthquakes occur,an overall subsidence of the dam causes a significant increase in the peak compressive stress,and shifts its location to the dam crest around the central valley.The compressive stress of face slabs gradually increases as the dam height increases.Thus an effective method of reducing the axial compressive stress is the use of filling material of lower compression modulus for the vertical construction joints in the central valley region.

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