The Damage Process Numerical Simulation And Analysis About Combination Beam-High Strength Concrete Columns Confined With Continuous Compound Spiral Stirrups

High-strength concrete columns confined with continuous compound spiral stirrups and combination beam(CB-CCSHRC) is one of the composite structure.Compared with other structure forms,it has more excellent seismic performance,high bearing capacity, saving materials and improve the construction progress,so it was widely used in the field of high-level structure.At present,the study on this kind of structure is still in its infancy, especially about the seismic performance of the whole structure of the research achievements of development and damage is relatively rarely.With the needs of the development of our country construction,the research of the structure is more urgent.This paper by using large-scale finite element software ABAQUS to build a two layer two cross CB-CCSHRC structure model,then analysis it by the way of numerical simulation.The damage model of concrete is the concrete damage plasticity model which in the software internal. After the model was successfully debugged,made a overall calculation of the model,emphs analyzes the stress distribution characteristics of the structure,the state of the cracking of the concrete and it failure model.By changing the reinforcement ratio,axial compression ratio and steel strength and concrete strength,stirrup strength and reinforcement ratio,and presence of composite floor slab,design parameters,such as research on the influence of the overall structure of the bearing capacity and seismic performance.The results showed that the increase of reinforcement ratio can significantly improve the bearing capacity of the structure and improve seismic performance of the structure;Axial compression ratio on the ductility of the structure is larger,the engineering design should be strictly in accordance with the requirements of specification control;Type increases with the increment of the strength of steel beam,the bearing capacity of the whole structure of increase is limited; And the existence of the concrete composite floor slab is greatly improved for the bearing capacity of the structure,this is mainly due to the slab and steel beam joint work well,so as to improve the bending stiffness of the beam and the bending bearing capacity.Based on the results of numerical simulation based on after carried on the thorough research and analysis,adopt the method of weighted coefficient method and finally established suitable for the whole structure of CB-CCSHRC damage model.Model is obtained by the model verification,the calculated results with the results of numerical simulation of a certain extent,can be a good match, the damage model built by further illustrate is feasible to a certain extent,and can well reflect the component,the structure of the floor and the overall damage development between migration.Built by CB-CCSHRC damage the structure of the model can also be good to reveal the structure of the CB-CCSHRC damage mechanism and damage development migration patterns.Model of a certain extent,to the structure of the earthquake damage assessment and repair work provide guidance.