Water Science and Engineering 2017, 10(2) 97-106 DOI:   http://dx.doi.org/10.1016/j.wse.2017.06.002  ISSN: 1674-2370 CN: 32-1785/TV

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Keywords
Concrete fracture
Direct shear
Hydromechanical coupling
Hydraulic conductivity
Elastoplastic model
Authors
He Yang
Shou-yi Xie
Jean Secq
Jian-fu Shao
PubMed
Article by He Yang
Article by Shou-yi Xie
Article by Jean Secq
Article by Jian-fu Shao

Experimental study and modeling of hydromechanical behavior of concrete fracture

He Yang, Shou-yi Xie, Jean Secq, Jian-fu Shao*

Laboratory of Mechanics of Lille, University of Lille, Villeneuve d'Ascq 59655, France

Abstract

In this study, the hydromechanical behavior of a concrete fracture under coupled compressive and shear stresses was investigated. A special experimental device was designed to create a planar fracture in a cylindrical sample and to carry out different kinds of hydromechanical tests on the fracture. Four series of laboratory tests were performed on an ordinary concrete sample. Hydrostatic compression tests were first conducted to characterize the normal compressibility of the fracture. In the second series, direct shear tests were conducted on the fracture under different normal stresses. The maximal shear stress of the fracture was determined as a function of the normal stress. In the third series, fluid flow tests were carried out in view of characterizing the overall hydraulic conductivity of the fracture as a function of its opening and closure. Shear tests with a constant fluid pressure were finally performed to investigate the influence of fluid pressure on the deformation behavior of concrete fractures. Based on the experimental investigation, an elastoplastic model is proposed. This model takes into account the nonlinear elastic behavior of a fracture under normal compression and the plastic deformation and failure due to shear stress. The model was coupled with the classical Darcy’s law to describe the fluid flow along the fracture by considering the variation of permeability with fracture aperture. Numerical results agree with experimental data from various laboratory tests.

Keywords Concrete fracture   Direct shear   Hydromechanical coupling   Hydraulic conductivity   Elastoplastic model  
Received 2017-01-02 Revised 2017-03-23 Online: 2017-04-30 
DOI: http://dx.doi.org/10.1016/j.wse.2017.06.002
Fund:

This work was supported by the National Key Basic Research Program of China (Grant No. 2006CB400502), the French National Agency for Radioactive
Waste Management (Grant No. 51992), and the European Commission through the Collaborative Project Cebama (Grant No. 662147).

Corresponding Authors: jian-fu.shao@polytech-lille.fr (Jian-fu Shao).
Email: jian-fu.shao@polytech-lille.fr
About author:

References:

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