Nonlinear fatigue damage of cracked cement paste after grouting enhancement

Grouting reinforcement is an important part of modern engineering and has grown in popularity due to the benefits of grouting enhancement on cyclic loading. Understanding the fatigue mechanism of grouting-enhanced structures is vital to the design and the long-term stability analysis of such structures. In this study, the fatigue mechanical properties of cracked cement paste after epoxy resin grouting enhancement under different cyclic conditions were investigated in the laboratory and an inverted S-shaped curve was proposed to describe the damage accumulation. The test results indicated that the fatigue axial deformation can be divided into three stages: the initial stage, constant velocity stage and accelerating stage. The irreversible deformation can be used to describe the damage accumulation. The fatigue process is significantly affected by the upper limit stress level and the stress amplitude. In addition, the exponential relationship between stress amplitude and fatigue life was obtained. The proposed S-shaped curve was validated by an experimental fatigue strain test. The tests result upon various load conditions and crack types represented a good agreement with the predicted data.

[1]  Ning Li,et al.  Energy Dissipation-Based Method for Fatigue Life Prediction of Rock Salt , 2018, Rock Mechanics and Rock Engineering.

[2]  Jin-Keun Kim,et al.  Experimental study of the fatigue behavior of high strength concrete , 1996 .

[3]  Walter Salvatore,et al.  The characterization of marble by cyclic compression loading: experimental results , 2000 .

[4]  Kenneth W. Neale,et al.  Numerical study of the effects of shear deformation and superimposed hydrostatic pressure on the formability of AZ31B sheet at room temperature , 2015 .

[5]  C Careeri.  STUDY OF ROCK MESO-DAMAGE EVOLUTION LAW AND ITS CONSTITUTIVE MODEL UNDER UNIAXIAL COMPRESSION LOADING , 2001 .

[6]  Yang Chunhe,et al.  Experimental study of fatigue deformation and damage characteristics of salt rock under cyclic loading , 2011 .

[7]  Feng Chunlin.  INVESTIGATION ON FATIGUE CHARACTERISTICS OF WHITE SANDSTONE UNDER CYCLIC LOADING , 2009 .

[8]  David J. Williams,et al.  Mechanism of rock fatigue damage in terms of fracturing modes , 2012 .

[9]  Alberto Meda,et al.  Marble behaviour under monotonic and cyclic loading in tension , 2004 .

[10]  Zhanping You,et al.  Fatigue Equation of Cement-Treated Aggregate Base Materials under a True Stress Ratio , 2018 .

[11]  Jian Wen-bin.  EXPERIMENTAL RESEARCH ON FATIGUE CHARACTERISTICS OF SANDSTONE USING ULTRASONIC WAVE VELOCITY METHOD , 2008 .

[12]  Zhechao Wang,et al.  Finite element analysis of the hydro-mechanical behavior of an underground crude oil storage facility in granite subject to cyclic loading during operation , 2015 .

[13]  Shucai Li,et al.  Fatigue Behavior of Granite Subjected to Cyclic Loading Under Triaxial Compression Condition , 2013, Rock Mechanics and Rock Engineering.

[14]  Zhenkun Lei,et al.  Study on bending damage and failure of basalt fiber reinforced concrete under freeze-thaw cycles , 2018 .

[15]  Chunhe Yang,et al.  Mechanical properties of Jintan mine rock salt under complex stress paths , 2012 .

[16]  Pathegama Gamage Ranjith,et al.  Experimental Investigation on Deformation Failure Characteristics of Crystalline Marble Under Triaxial Cyclic Loading , 2017, Rock Mechanics and Rock Engineering.

[17]  Zhou Xue-jina,et al.  Method selection for defining damage variable of rock subjected to static loadings and cyclic impacts , 2013 .

[18]  Joseph F. Labuz,et al.  Damage of marble from cyclic loading , 2001 .

[19]  Chu Jun.  EXPERIMENTAL STUDY ON CHARACTERISTICS OF STRENGTH AND DEFORMATION OF COAL UNDER CYCLIC LOADING , 2007 .

[20]  Benjamin Cerfontaine,et al.  Cyclic and Fatigue Behaviour of Rock Materials: Review, Interpretation and Research Perspectives , 2018, Rock Mechanics and Rock Engineering.

[21]  Zhanping You,et al.  Normalization of fatigue characteristics for asphalt mixtures under different stress states , 2018, Construction and Building Materials.

[22]  Sun Hong.  TESTING STUDY ON FATIGUE DEFORMATION LAW OF RED-SANDSTONE UNDER TRIAXIAL COMPRESSION WITH CYCLIC LOADING , 2006 .

[23]  De-Xin Ding,et al.  Inverted S-shaped model for nonlinear fatigue damage of rock , 2009 .

[24]  Yi Liu,et al.  Experimental Investigation on the Fatigue Mechanical Properties of Intermittently Jointed Rock Models Under Cyclic Uniaxial Compression with Different Loading Parameters , 2017, Rock Mechanics and Rock Engineering.

[25]  W. Bańkowski,et al.  Evaluation of Fatigue Life of Asphalt Concrete Mixtures with Reclaimed Asphalt Pavement , 2018 .

[26]  Yin Zuo.  Study on the fitting methods of logistic curve , 2002 .

[27]  K. T. Chau,et al.  Crack coalescence in a rock-like material containing two cracks , 1998 .