YANG Weiguo, XU Hongye. PRACTICAL NONLINEAR ANALYSIS METHOD OF NEW-OLD CONCRETE COMPOSITE BEAMS WITH SHRINKAGE AND CREEP[J]. MECHANICS IN ENGINEERING, 2017, 39(4): 379-383. DOI: 10.6052/1000-0879-17-021
Citation: YANG Weiguo, XU Hongye. PRACTICAL NONLINEAR ANALYSIS METHOD OF NEW-OLD CONCRETE COMPOSITE BEAMS WITH SHRINKAGE AND CREEP[J]. MECHANICS IN ENGINEERING, 2017, 39(4): 379-383. DOI: 10.6052/1000-0879-17-021

PRACTICAL NONLINEAR ANALYSIS METHOD OF NEW-OLD CONCRETE COMPOSITE BEAMS WITH SHRINKAGE AND CREEP

  • The new-old concrete composite beams are considered as an important engineering beam with a bond-slip in the composite surface. Based on the deformation compatibility relationship across the composite surface of the new-old concrete composite beam, a nonlinear differential equation is derived, for the axial force of the new-old concrete composite beam. The theoretical expressions of the section coordination coefficient are obtained from the equation. With the coordination coefficient, a practical nonlinear analysis method is established, which can exactly describe the shrinkage and the creep of the new-old concrete composite beams. The Bernoulli assumption and the coordination coefficient of the section are duly combined. Compared with the existing analytical solutions, the accuracy can meet the engineering requirements.
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