Seismic Performance Analysis Of Frame-rocking Wall Structure With Dual Energy Dissipation Mechanism

Frame-shear wall structure is widely used in building structure s.However,under the action of strong earthquakes,the failure of a coupling beam or floor slab and plastic hinge at the bottom of the shear wall can occured.According to the different deformation modes of the frame s hear wall and the mechanism of rocking wall can be to reduce the internal force of the foundation of structural wall,this paper proposes a frame rocking wall structure system with dual energy dissipation mechanism to improve the energy dissipation capacity of the overall structure,and to accurately and effectively control the structural damage components at the same time,realize the replaceable damage unit and the recovery of structural function after earthquake.In order to study the seismic performance of the frame rocking wall structure with dual energy dissipation mechanism,In this paper,the internal force and displacement of the frame rocking wall structure are firstly theoretical calculated.Secondly,the traditional frame-shear wall structure,the frame-shear wall smart dual structure with BRB,the frame rocking wall structure with BRB be set between the structure and rocking wall,the frame rocking wall structure with dual energy dissipation mechanism comparison analysis model are established,perform nonlinear dynamic time history analysis and seismic response comparison.Finally,The nonlinear dynamic and static analysis of the frame-rocking wall structure with different parameters of BRB and MD is carried out,and the following main conclusions are obtained:1.Through studying a great number of relevant literatures home and abroad,theoretical calculations and derivation analysis show that the mechanical performance of the frame rocking wall structure is better than that of the frame shear wall structure,which is mainly reflected in two aspects:the deformation of the frame rocking wall structure is more uniform,and the internal force of the rocking wall is smaller than that of the shear wall.Internal force and the distribution is more even and reasonable.2.Frame rocking wall structure with rocking mechanism and BRB,MD energy dissipation mechanism,structural wall rocking and energy consuming unit can effectively reduce the peak acceleration response and seismic demand of the structure.Although the lateral displacement response of the frame structure is increased,however,fully dissipate energy through reasonable design of energy consuming unit parameters to meet regulatory requirements;The seismic performance of the frame rocking wall structure with dual energy dissipation mechanism is better than single BRB energy-consuming mechanism structure3.The dynamic response variability of the frame rocking wall structure of MD and BRB with different parameters is increased,and there is a mutual coupling effect.However,when the MD stiffness is between 0.1 C and 1 C and the BRB intensity is between 0.1f_y and 0.3f_y to form the optimal range in a triangular region,the seismic energy demand of the dual energy consuming mechanism frame rocking wall structure is significantly reduced compared with the traditional frame-shear wall structure.4.Through the static analysis of the dual energy mechanism frame rocking wall structure,it is found that the yield time of MD is delayed with the increase of its stiffness and accelerates with the increase of BRB strength.The yield time of each layer of BRB is delayed with the increase of BRB strength and accelerates wi th the increase of MD stiffness.Therefore,it is recommended to use MD with large stiffness and small yield strength and BRB with reasonable value to ensure that BRB yields energy before MD.