Research On Application Of High Ductile Concrete Coupling Beam In Super-high-rise Frame-core Tube Structure

High ductile concrete(HDC)is a kind of new structural material with high strength,high toughness,high crack resistance and high damage resistance.It can improve the shear performance of the component,improve the seismic performance and damage resistance of the concrete structure.The use of high ductile concrete for the coupling beam parts of the super high-rise building structure can effectively solve the problem of small-span and high-span beam-bar linkage and shear ratio exceeding the limit,and improve the seismic performance of the structure.Coupling beam early occurrence of brittle shear damage,the loss of energy-consuming components of the role.In this paper,the design of high-rise concrete beam is applied to the design of super-high-rise frame-core tube structure,and the main contents and conclusions are as follows:(1)Evaluation of seismic performance of super high-rise frame-core tube structure.According to the structure of the project,set the seismic performance target,the seismic performance analysis.The results show that the engineering structure selection is reasonable,under the wind load and the earthquake,the calculation indicators meet the specification requirements,to meet the structural seismic performance objectives.(2)Feasibility analysis of high ductile concrete coupling beam used in frame-core tube structure.The HDC material is applied to the beam structure of the core tube structure of the project.The results show that the HDC material can effectively solve the problem that the coupling beam,especially the small span and the height ratio,Energy dissipation components in the earthquake under the premature occurrence of brittle shear failure and exit the work,increase its energy consumption capacity,significantly improve the small span height than the coupling beam of seismic performance level.(3)The high ductile concrete is applied to the coupling beam part of the frame-core tubestructure,and the dynamic elasto-plastic analysis is compared.During the calculation and analysis,two groups of four models were established to study the performance of different seismic acceleration periods.The results show that the application of the high-ductile concrete coupling beam structure of the overall structure,the deformation capacity and floor shear effect are significantly improved,the structure into the elasto-plastic stage after the nonlinear energy consumption increased to some extent.The high ductile concrete has a significant effect on the seismic performance of the whole structure.