Dynamic Response Analysis Of Large Height-to-width Ratio Structure With Triple Friction Pendulum Isolator

The earthquake is a kind of natural phenomena which was occurred frequently and irregularly.The great earthquake will cause the huge losses for human life and property safety.Meanwhile,the earthquake will also bring psychological fear to people in the building.Usually the building may use traditional seismic design in a long-term.The power of earthquake can be resisted in some degree,but it is not enough.Even if the power of earthquake is resisted partially,however this building cannot be used anymore.By the seismic isolation technology published and developed,it provides a better choice for the earthquake resistance of building.The seismic isolation technology is that the isolation device is used to separate and connect with building foundation,then to make the earthquake power directly work on the isolation device.Not only the vertical load of building can be provided,the horizontal power of earthquake can be resisted as well,and the upper structure characterized by horizontal motion.There are so many types of isolation bearing,but the core objectives are basically same.Friction pendulum bearing friction is a kind of bearing which is more mature in the friction and shock isolation bearing.Although it has been widely used in foreign countries,but the application of promotion is very little in China.It is very necessary to proceed the experimental study on the friction pendulum isolation bearing,which can fully master the basic principle of friction pendulum bearing,dynamic characteristics,material size and related parameters.At the same time,the experiment also provides important theory,parameter support and experimental experience for the finite element application si mulation for triple friction pendulum isolation bearing and the future tests.Based on the relevant parameters obtained from the experiment of the friction pendulum bearing friction,the principle of the triple friction pendulum isolation bearing and also the motion,we set the relevant parameters of the triple friction pendulum isolation bearing on the finite element software SAP2000.And established the large height-to-width ratio structure in the finite element software,and then compared it with non-isolated and triple friction pendulum isolation bearing,in order to analysis the isolation effect and feasibility of large height-to-width ratio structure.By means of modal analysis and time course dynamic analysis,it is shown that the triple friction pend ulum isolation bearing have a better effect on large height-to-width ratio structure to resist earthquake,which improves the floor displacement,interlayer displacement,interlayer shear and floor acceleration of the large height-to-width ratio structure under earthquake power.It effectively prevents the destruction of the structure,overcomes the large height-to-width ratio structure by using isolation technology,and provides a theoretical basis for isolation of large height-to-width ratio structure.The research and analysis of this paper provides some theoretical and empirical reference for the further research and application regarding the triple friction pendulum isolation bearing.