Abstract
The specific exemplification and application of the structural stiffness and ductility theory have been elaborated in PKPM model adjustment and optimization and structural design process in the paper. The structural stiffness and ductility theory are combined with PKPM practical skills so that the methods and ideas of the structural stiffness and ductility design are generalized, that are completely helpful and strongly operational for PKPM model adjustment and optimization. The result shows that when the displacement angle, displacement ratio, cycle ratio, stiffness ratio, the ratio of stiffness to weight, shear weight ratio, axial compression ratio meet the requirements of the building code and are in a specific range, the structure is not only safe but also economical and the ratios of the structural design are also easier to implement.
