CONSTITUTIVE RELATION OF END PLATE CONNECTIONS BASED ON CORRELATION AND SENSITIVITY

摘要

Studies agree that semi-rigid behavior of joint should be considered in frame analysis and design. Replacing the traditional methods, the structural sensitivity analysis of constitutive relation was carried on based on the correlations and probabilities of design variables for extended end plate connections with stiffeners. 4 specimens of beam to column with various configurations were tested under mono tonic loads. The loading capacity and the rotation deformation have been measured. The initial rotation rigidity, the maximum bending moment, the ultimate load and so on essential characteristic parameters have been obtained. With a new way, an elastic moment-rotation model was put forward within considering the correlations of geometrical parameters. From the mathematical expression can be seen that parameters how sensitive to the relative rotation, positive or negative correlation with the relative rotation, and the parameters and their power exponents have obvious physical meaning. Proposed analysis method on constitutive relation of the semi-rigid end-plate connection based on correlation analysis and probability sensitivity analysis was suitable for steel frames and concrete-filled steel tubular frames in the structural analysis and design.