Study On Seismic Performance And Design Method Of Self-centering Rocking Wall-frame Structure

The randomness of the earthquake and the complexity of the building structure often cause ordinary buildings to suffer more severe earthquake than the local fortification,resulting in serious damage to the building.For this reason,the rocking wall-frame structure with self-centering function has drawn widely concerned by many scholars and experts in recent years.Self-centering rocking wall-frame structure is a new type of seismic structure system,which is a rocking wall-frame structure with self-centering ability.It can restore seismic performance with minor repair or even without repair In this paper,the bottom of the frame-shear wall structure is weakened on the basis of the original frame shear structure by changing the fixed connection to a hinged connection and relaxing the overall lateral constrains of the structure,making it a rocking wall-frame structure system.At the same time,the prestressed steel beam is embedded swing wall and fixed with the foundation to form the rocking wall-frame structure with self-centering function.In this paper,the finite element software SAP2000 is used to give static elastic plastic analysis and Non-linear dynamic time-history analysis for the structure of frame-shear wall structure,rocking wall-frame structure and self-centering rocking wall-frame structure.The seismic performance of three different structural systems is studied by changing the constraint of the bottom of the shear wall and the number of prestressed steel beams embedded in the wall rocking.Based on the results of three different structural systems,a set of research and design method of transforming the frame-shear wall structure to self-centering rocking wall-frame structure are summarized in detail to provide some valuable reference for improving the seismic performance of building structures in the future.The main research work is as follows:1?Aiming at the different seismic performance of frame-shear wall structure and rocking wall-frame structure,the finite element software SAP2000 was used to analyze static elastic-plastic,the structure of the cycle,the performance point,plastic hinge distribution and structural layer displacement to compare the seismic performance of frame-rocking wall and frame-shearing wall structure.2?Aiming at the different seismic performance of frame-shear wall structure,rocking wall-frame structure and self-centering rocking wall-frame structure,the finite element software is used to analyze the Non-linear dynamic time process,the interlayer displacement,the interlayer displacement angle,the residual deformation and the internal force of the wall to compare the seismic performance of the three structure systems.3? By changing the number of prestressed tendon steel bundles in the self-centering rocking wall-frame structure,In the simulated seismic model,the contribution to the seismic performance of the prestress in the structural system is studied.4?Based on the modeling and analysis process of three different structural systems,a set of research methods of self-centering rocking wall-frame structure with higher seismic performance is proposed.In view of the concentrated damage parts often occurred in the building structure during earthquake,a replaceable composite steel plate energy dissipation concrete beam column joint is designed,which provides a reference for seismic design of the structure.5?For instance of a project in Qingdao area,the frame-shear wall structure is transformed into a self-centering rocking wall-frame structure according to the design method proposed in this paper.By using the finite element software SAP2000,the simulating results confirm the accuracy and reliability of the research results.