Experimental Study Of Waste Laminated Tyre Isolation Pad Under Different Design Compressive Stresses

With the frequent occurrence of earthquake disasters in recent years,there are countless losses caused by the earthquake,and the rural area is also the forward position of disaster,so people urgently need a method to reduce the loss.In the modern city for earthquake disaster reduction mostly adopts the isolation structure,change "resistance to hard" to "use softness to overcome hardness",the most commonly used is rubber isolation bearing,the expensive rubber isolation bearing effect is very good,but for the rural areas of China,the level of economic development is not as good as that of a city,and the cost of building input is relatively low,it is impossible to achieve building isolation by using expensive rubber isolation bearing.fully modeled urban isolation method is obviously not practical nor feasible,so invention a conforms of China current situation,both economic and effective isolation technology used for development domestic rural isolated buildings has been imminent.In this paper,the sedan tire is used as the raw material,and a kind of laminated tire isolation pad is made and synthesized by cutting and stacking,and the isolation technology is placed in the tooth type beam to solve the isolation of village buildings.In this paper,through the mechanical performance test of the waste laminated tyre isolation pad.Explores the Layer number,length,design pressure stress effect on the performance of its,analyzed the isolation performance of the waste laminated tyre isolation pad,provide a reference basis for henceforth rural isolation design,and improve the seismic capacity of rural housing in rural areas.The results of the study show that:(1)With the increase of layers,the horizontal equivalent stiffness of the waste laminated tyre isolation pad gradually increases,while with the vertical ultimate bearing capacity,the vertical stiffness,the equivalent damping ratio and the energy dissipation capacity gradually decrease.The layers has a great influence on the equivalent damping ratio.(2)With the increase of length,the vertical stiffness,horizontal equivalent stiffness and energy dissipation capacity of the waste laminated tyre isolation pad gradually increase,while the equivalent damping ratio first increases and then decreases.Length has great influence on equivalent damping ratio and energy dissipation capacity.(3)With the increase of design pressure stress,the vertical stiffness and the horizontal equivalent stiffness of the waste laminated tyre isolation pad gradually increase,while the equivalent damping ratio and energy dissipation capacity increase first and then decrease.(4)The shape of the hysteresis curve of the waste laminated tyre isolation pad is relatively stable,and the closed curve shows the bow shape.The residual displacement is about 11 mm,which indicates that the isolation pad has a good reposition ability,and the residual displacement of the 7 layer laminated tire is the smallest.The equivalent damping ratio range of the isolation pad: 5%～11%.