Experimental Investigations Of Platform Vibrator About Isolation Cushion With Sand And Rubber Particles In Different Particle Sizes

An earthquake is a violent movement inside the earth.The harm caused by the earthquake is especially serious in the rural areas.With the development of economy,more and more scholars have been studying the new isolation technology all over the world.Compared with the traditional seismic isolation technology,seismic isolation technology has more ad vantages such as:the variety of seismic isolation methods,the significant increase of structural safety and the obvious effect of seismic isolation.In the future,we need to increase the popularity of isolation technology.Sand and rubber cushion isolation technology is mainly in the structure and the foundation or between the floor to set up a mixed cushion as a buffer layer.The natural vibration period and damping of the building are increased,and the excellent period of the site is avoided.The seismic energy can be controlled by the damping energy,hysteretic energy and elastic energy of the seismic isolation layer,and the energy of the earthquake can be controlled in the upper structure.So that the safety of residential housing has been improved.And sand and rubber particle isolation technology is low cost,convenient construction,in line with the actual situation in rural areas.In this paper,the present situation and principle of seismic isolation technology are described in detail.This paper mainly studies the technology of sand and rubber cushion with different particle sizes.Based on the similarity theory,the dynamic equation analysis and dimensional analysis method are used to deduce the similarity relation of the physical quantities used in the model making.Based on the similarity principle,the calculation of the weight and reinforcement of the prototype in the shaking table test is carried out.The design and manufacture of the 1:8 frame model are carried out with the sand and rubber particle isolation cushion as the research object.Screening of Shiraishi Eisa and rubber particles with different particle sizes.In the shaking table test,the EI-Centro wave with different peak acceleration is input.In order to study the damping effect of sand and rubber cushion in different particle size ratio.Study on the damping effect of the hybrid cushion by the acceleration response.The results show that:with the increase of particle size ratio,the acceleration response of the upper frame structure is reduced.However,the bigger the particle diameter ratio is,the better the damping effect is when the ratio of the particle size of the quartz sand to the rubber particle is between 1?1.5.