Abstract
Bearing capacity of the composite beam is analysis with three nonlinear finite element methods in the thesis, in which Hognostand's uniaxial compression equation and BKIN model was applied to represent the constitutive relationship of concrete and steel in consideration of nonlinearity of concrete and the yield and strengthening characteristics of steel respectively. The interface slip between steel and concrete in composite beam is reasonably taken into account in the analysis with two methods. Those methods are compared according to the finite element analysis result, and the character of those methods are discussed and verified with the experimental result.
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