Lü Cong-cong, LI Zong-li. An Elastoplastic Damage Constitutive Model for Concrete Considering Unilateral Effects[J]. Applied Mathematics and Mechanics, 2017, 38(2): 144-152. doi: 10.21656/1000-0887.370278
Citation: Lü Cong-cong, LI Zong-li. An Elastoplastic Damage Constitutive Model for Concrete Considering Unilateral Effects[J]. Applied Mathematics and Mechanics, 2017, 38(2): 144-152. doi: 10.21656/1000-0887.370278

An Elastoplastic Damage Constitutive Model for Concrete Considering Unilateral Effects

doi: 10.21656/1000-0887.370278
Funds:  The National Natural Science Foundation of China(General Program)(51379178)
  • Received Date: 2016-09-12
  • Rev Recd Date: 2016-09-29
  • Publish Date: 2017-02-15
  • In order to describe the nonlinear mechanical properties of concrete effectively and accurately, a new elastoplastic damage constitutive model for concrete was established with the explicit integration algorithm, under the theoretical framework of continuum damage mechanics and irreversible thermodynamics. First, a yield failure criterion based on the unified strength theory was employed for this model, and then 2 scalar damage variables were introduced to better describe the quite different tensile and compressive mechanisms of concrete, respectively. Besides, the influence factors of reverse loading were adopted in view of the unilateral effects under alternating cyclic loading conditions and the interaction effects of tension and compression damages in the multiaxial stress state. Several numerical simulations were presented, and good agreement was achieved between the numerical results and the test results for concrete specimens under uniaxial loading, multiaxial loading and alternating cyclic loading, which verifies the validity and accuracy of the proposed model.
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