The Elasto-plastic Earthquake Response Analysis Of High-rise Structure With Inclined Column Transfer Structure

Inclined column transferring structure is a new transferring structure appeared in recentyears. It transfers forces simply and directly, makes use of the space effectively, enhances thestructural mechanical property, and lowers the engineering cost, thus shows broad applicationprospect. Presently, there is seldom relevant research for elsto-plastic earthquake responseanalysis of high-rise structure with inclined column transfer structure.The elasto-plastic properties of RC structure are the main issues in structural research.Since the fiber element model is the most refining and performs close to the actual structure inelasto-plastic analysis of RC frame structure, it can be widely applied. The fiber elementmodel is closely related with the constitutive models of materials hence the accuracy ofcomputational simulation analysis greatly depends on the material models. Model of Manderfor confined concrete considering the effects of transverse reinforcement and longitudinal barsis well applied in engineering practice. However, Mander model for confined concrete is socomplicated that hardly indicate the performance improving of confined concrete.The creative works of this research include following three aspects:(1) Through systematically studied on the data of the shaking table test for the high-risestructure with inclined column transfer structure, the problems of the structural design werefound.(2) Based on confined reinforced concrete model, a new calculation method of Mandermodel considering the confining effects of the asymmetrical transverse reinforcement torectangular concrete member is proposed and applied to practical engineering. By the methodof calculating the power mean of two directions equivalent axial confining pressure, thedifferent confining pressures of two axes can be taken into account.(3) Based on the comparison and analysis between the earthquake simulation test resultand the numerical simulation results of the example structure, the tower structure and theinclined column transferring structure are respectively optimized. For the greater impact oftorsion effect of tower under horizontal earthquake, the example structure is optimized byincreasing Buckling-Restrained Braces. For the small angle of slope, long length and bigsection of inclined column and conservative design, a calculation method is proposed applying to the angle of slope and optimized section of inclined column. The optimizeddesign is proved to be feasible and effective after using elasto-plastic seismic responseanalysis method to analyze the optimized structure.