Friction-sliding Isolation Model Structure Designing And Finite Element Analysis

Earthquake is one of the most serious natural disasters in the world, the disastersdirectly caused by it include the destruction of buildings and structures, surfacedamage, landslides, tsunami, and so on. Therefore, engineering structure design theoryand application methods researching for how to reduce or avoid the impact ofconstruction from the earthquake, has important theoretical significance and practicalvalue.On the basis of new friction-sliding isolation bearings, analysis of structureearthquake response has carried on the frame structure with base isolation and theisolation of water tank on the roof. The main work of this paper includes:①the basicprinciple and main characteristics was introduced and analyzed, especially the researchand development of base isolation structure and interlayer sliding isolation structure,some problems existing in the friction-sliding isolation technique has been pointed out;②according to the principle of structural dynamics, the seismic response equation ofthe earthquake resistant structure, the friction-sliding isolation and the interlayersliding isolation structure is established, and with the midpoint acceleration method ofthe step-by-step integration method, the acceleration response of the structure underhorizontal seismic action is solved;③Using new type of solid lubricant mos2as thecoating material of friction-sliding isolation device, taking a practical project as theprototype, three new friction-sliding isolation device has been designed and producedthe corresponding earthquake isolation performance test has been carried on, some general rules is summed up;④Based on the model similarity theory and theconditions of shaking test table, a similar ratio of1/5of the5layer isolation test modelof reinforced concrete frame structure has been designed, at the same time, ANSYSfinite element analysis software is used to establish the finite element analysis modelof the structure of the experimental model, the seismic response analysis of thestructure model under different conditions is calculated, it provides the theoreticalbasis for the shaking table test;⑤ANSYS finite element analysis software is used toanalyse a practical project, which adopts new friction-sliding isolation device of theprototype structure, in cases of seismic isolation or seismic resistant structure, the newfriction-sliding isolation device after the vibration isolation effect of practicalengineering, some reference for practical engineering application of the conclusionsand recommendations has been given.The research results show that the adoption of mos2solid lubricant coatingisolation device, the friction and sliding performance is stable, the coefficient offriction is generally in the range of0.04~0.06. After installation of isolation device,when the earthquake effect is less than the maximum static friction force of isolationlayer, the earthquake isolation layer does not slip, seismic response of the base-isolatedstructure is similar to those of aseismic structure; When the earthquake effect is greaterthan the maximum static friction force of isolation layer, the isolation layer slip occurs,vibration isolation effects. At this time, the earthquake response of the upper structureis about translation, its acceleration, relative displacement between the layers and floorseismic shear force significantly decreases, it shows that the new type of frictionsliding isolation device in this paper can significantly reduce the seismic response ofthe frame structure, and its vibration isolation effect is obvious.The results also showed that the projection on the top of the building, such as thebottom of the particle damping vessel which is installed new friction-sliding isolationdevice, sliding isolation device can have the effect of TMD to decrease the seismicresponse of the frame structure.