ANALYSIS OF FINITE ELEMENT ON BASE ISOLATED BUILDINGS EXPOSED TO EARTHQUAKE LOADS

A formulation of finite element modeling too incompressible elastic material such as rubber-like elastomers has been developed that takes into account large displacements and large elastic strains and the effect is inelastic. The main reason for their use in seismic isolation devices, such as laminated rubber material capacity to support high loads in compression and displacement of the cutting structure is large. Energy dissipation capacity of these devices using high-damping rubber elastomer composition of the carbon black particles, or a lead-plug inserts increased.Residual stresses, which appears when the device is subjected to static or quasi-dynamic and cyclic loads, by the frequency dependent viscoelastic and plastic models are models. Have a bearing using a single element of the system is able to describe complex behavior modeling separation is real. The proposed model is validated using available experimental results and it is proved to be a powerful tool in dealing with different bearings. Finally, results for a six-storey base isolated building subjected to the El Centro earthquake are given.

کلیدواژه ها:

elastomers ، rubber-like materials ، seismic base isolation