• Mechanical properties of concrete to cyclic uniaxial tensile loading using variable waveforms

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    • Keywords

       

      Cyclic; uniaxial tension; dissipated energy; damage evolution; waveform; concrete

    • Abstract

       

      The mechanical properties of concrete under cyclic tensile loading using square waveform, sine waveform and ramp waveform are studied. The experiments are performed on a closed-loop electro-hydraulic servo-controlled material testing system (MTS). The axial strain, dissipated energy per loading cycle, the damage evolution law and deformation modulus are mainly studied. The results show that the three-stageevolution law of axial strain and damage variable of concrete under ramp waveform and sine waveform are more obvious than those under the square waveform. The dissipated energy changes at different stages of fatigue life.At the beginning and end of the fatigue life, the rate of dissipated energy is higher than that at the medium stage of the fatigue time, which is attributed to the formation of cracks. The evolution of deformation modulus of concrete subjected to cyclic tensile loading using three loading waveforms also shows three stages: fast increase in the damage—increase at a slow constant rate—and accelerated increase in damage until failure.

    • Author Affiliations

       

      YUZHI CHEN1 2 XUDONG CHEN2 JINGWU BU3

      1. Architectural Engineering Institute, Jinling Institute of Technology, Nanjing 211169, China
      2. College of Civil and Transportation Engineering, Hobai University, Nanjing 210098, China
      3. College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China
    • Dates

       
  • Sadhana | News

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