Numerical Analysis Of New Type Of Prefabricated Concrete Frame-rocking Wall Structure

With the industrialization of buildings and the more serious disasters caused by earthquakes,scholars from various countries have begun to focus on high-performance fabricated structural systems that can quickly assemble and reduce damage during earthquake.Based on this goal,this paper focuses on the new frame-rocking wall system,including prestressed frames and rocking walls.The system self-recovery is provided by unbonded posttensioned tendons,while the bending stiffness and energy dissipation are provided ordinary steel.Different from the plastic hinge damage and large residual deformation in traditional frame structure,the frame-rolling wall system is characterized by large nonlinear displacement,while the damage and residual deformation are relatively small.It can be seen that the modeling method of the fabricated frame-rocking wall structure is different from the traditional cast-inplace structure,and it is necessary to consider the gaps in the assembled structure,the energy consuming device,and the rocking behavior of the rocking wall.These processes involve large deformations and nonlinearities,so the finite element model that accurately reflects the force mechanism is needed.In order to solve these problems,we first need to analyze the composition of the new type framework system,study the structural details of the joints,and especially select representative joints such as beam-to-column joints,energy-consuming column joints and rocking wall.Based on PERFORM-3D platform,a precise and simplified analysis model of PPEFF system are proposed and compared with the experimental data.The simplified model is efficiency and meets accuracy requirements,which is the foundation for practical project.The design and performance evaluation of the seven-storey full-scale test structure are carried out,and the method is systematically validated at structural level.On the basis of the above work,the last part is to apply the analysis model to seven-degree project and eight-degree project,and evaluate them according to the performance-based design method and damage evaluation criteria of the China and US,which indicates that the new structural system has reached the conditions of engineering application.