Nonlinear Analysis Of Reinforced Concrete Frame Structures With Buckling Restrained Braces

Under the action of earthquake,the existing reinforced concrete structure which is not enough for seismic performance is prone to strengthen the seismic strengthening to meet the requirements of the current seismic code.The traditional seismic method is to dissipate the seismic energy through the elastoplastic deformation of the main structural members.But due to the uncertain characteristics of the earthquake action,the structure may be seriously damaged or collapsed under the action of earthquake.The structure of energy dissipation technology to make up for the shortcomings of the traditional seismic design method,it is mainly composed of the main structure component dissipation seismic energy transfer to the energy dissipation damper to consumption,thereby greatly reducing the damage or injury of main structure component.The buckling restrained brace not only effectively solves the buckling problem of common support under rare earthquake,but also acts as passive control of the main structure as a damping damper.The buckling restrained brace has attracted the attention of scholars and engineers in the field of earthquake engineering.In this paper,the seismic performance and design methods of the reinforced concrete frame with buckling constraints are studied.The main research contents are as follows:(1)The main design and stability analysis of the buckling constraint support,based on the bearing capacity and stiffness of buckling constraint support bilinear restoring force model,and generation into the existing scale ratio test to verify its feasibility.Validation showed that the established in this paper,buckling constraint support bilinear restoring force model of dimensionless skeleton curve and the theoretical results fit well with test results data,can be used for the analysis and research,support frame structure static elastoplastic analysis for the buckling constraints laid a foundation.(2)Of a reinforced concrete frame structure using SAP2000 to Push over analysis,draw the structure of the base shear-vertex displacement curve,the plastic hinge distribution,more severe earthquake and severe earthquake under the action of the size of the structure of the interlayer displacement Angle and structure of capacity spectrum and demand spectrum curve;Reinforced concrete frame structure to join in the same support after buckling constraint by using SAP2000 to analyze a Push-over,it is concluded that the structure of the basement shear-vertex displacement curve,the plastic hinge distribution and the size of the interlayer displacement Angle,structure,the ability of spectrum and demand spectrum curve.(3)In support of the reinforced concrete frame structure with buckling constraints and support without buckling constraints of reinforced concrete frame structure model analysis results were analyzed,including the structure of the base shear-vertex displacement,the plastic hinge distribution and development process,in under the action of earthquake and the rarely met earthquake structure lateral displacement of each layer and the size of the interlayer displacement Angle.Analysis of change of the ground motion parameter of the original framework structure and after joining buckling constraint support frame structure seismic performance,the influence of draw support with buckling constraints on seismic performance of reinforced concrete frame structure of the economy,the advantages of convenient and quick.