Study On Periodic Reduction Design Method Of Metal Energy Dissipation And Damping Wallboard Frame Structure

In the engineering design of multi-story RC filled wall frame structure,the filled wall is generally regarded as a non-structural member,and the weight of the filled wall is used as the upper line load of the beam or equivalent as the node load for modeling,and the influence of the filled wall is considered through the periodic reduction coefficient,which is between 0.5-0.9 in the specification,but the value range is wide.The research group proposed a kind of energy dissipation and shock absorption wallboard based on the energy dissipation of metal damper,which can act not only as the retaining member but also as the energy dissipation of the structure as the damper.For decorated with metal energy dissipation damping wall framework,in order to facilitate calculation,put forward can be applied to the equivalent period of response spectrum method reduction factor,can consider the stiffness effect of shock absorption wallboard,also considering the damping effect of wallboard,this article from the width of a structure,structural layout,filler wall height,filling wall facade arrangement and factors of filler wall filling rate,Analysis of its impact on structural period reduction and additional damping,the main contents are as follows:(1)ABAQUS software was used to verify the test done by the research group.Then,on the basis of the rationality of ABAQUS model,the influence of metal energy dissipation and shock absorption wallboard on frame beam was analyzed,and the equivalent calculation model suitable for ETABS software was proposed.The hysteretic performance of metal energy dissipation wallboards was simulated.Finally,the effectiveness of the ETABS model was verified by plane internal force analysis and three-dimensional structural time history analysis.In order to compare with metal energy dissipation and shock absorption wallboard,the equivalent diagonal support model of common filled wall is introduced,and the modal verification of related tests is also carried out.(2)Based on the analysis and research of the common filled wall frame structure and the metal energy dissipation wallboard frame structure,the periodic reduction change law of the frame with the metal energy dissipation wallboard and the common filled wall frame structure is studied under the different conditions of the width,height,plane arrangement of the filled wall,elevation arrangement of the filled wall and filling rate of the filled wall.(3)On the basis of considering the influence of the additional stiffness of the shock absorption wallboard on the natural vibration period of the structure,after considering the influence of the additional damping ratio of the energy dissipation wallboard,the law of reducing the seismic response of the structure with the additional damping ratio of the metal energy dissipation wallboard frame is obtained by the method of equivalent seismic influence coefficient.The range of periodic reduction coefficient of the wallboard frame structure with energy dissipation is obtained when the mode decomposition response spectrum method is used.(4)Based on a practical engineering,the establishment of energy dissipation damping metal wall frame model,FNA method is analyzed,then the empty frame on the basis of the equivalent cycle fold impairment analysis of vibration mode decomposition response spectrum method,to compare the two models of interlaminar shear,validation of metal energy dissipation damping wall frame the rationality of equivalent value cycle reduction.(5)Metal is proposed to damping wallboard and frame beam connection structure,and analyses in the event of a displacement between layers,the joint weld stress state,after the weld is presented on the basis of previous analysis under three to the stress state of strength calculation,and through calculation,the suitable length of weld connections can meet the requirements of the strength of the weld.