| It’s known that the earthquake is a serious threat to the safety of human life and property.With the development of science and technology,people’s means of resisting and preventing earthquakes have been strengthened,and the technology of energy dissipation has been developed rapidly.Lead is widely used in dampers because of its high plasticity and flexibility,high rigidity and excellent energy consumption.As a kind of metal damper,lead damper has high energy dissipation and wide application prospects.However,it is difficult for a single material to solve its own connection problem,so it is possible for a variety of materials to consume energy together.In this paper,the honeycomb aluminum-lead composite damper is a metal damper which consumes energy together with two kinds of materials.Two additional dampers are designed and tested on the basis of the previous experiments of the honeycomb aluminum-lead composite damper.The failure state and hysteretic curve of the damper are analyzed.The results show that the hysteretic curve of the honeycomb aluminum-lead composite damper is full and its energy dissipation performance is good.The hysteresis curves and energy dissipation parameters of the honeycomb aluminum-lead composite damper are obtained by numerical simulation with finite element software.The comparison with the experimental results shows that the simulation and the test are in good agreement and reflect the actual working conditions.In order to realize the reasonable design of the damper,the effects of the height of the composite,the thickness of the honeycomb aluminum wall and the aperture on the energy dissipation parameters of the honeycomb aluminum-lead composite damper are analyzed.The results show that the height of the composite,the thickness of the honeycomb aluminium wall and the aperture have great influence on the maximum shear stress,the skeleton curve,the storage shear modulus and the equivalent damping ratio.Taking the height of the composite,the thickness of the honeycomb aluminium wall and the aperture as variables,100 groups of simulation calculation examples are designed.The linear regression formulas of maximum shear stress,maximum damping force,storage shear modulus and equivalent damping ratio are obtained respectively.The error analysis with the simulation values shows that the formula has good applicability. |
