Selection Of The Lrb Standard Study. Seismic Design Of Bridges Have Been Built

The Lead-Rubber-Bearing (LRB) is a type of isolation device in its entirety. This paper introduces the development and present situation of vibration absorb technology in the world; generally analysis the Rubber-Bearing (RB) and LRB' s operative mechanism, function and the calculation of parameter; advance the concept of standardization to LRB; On the basis of generally analyzing the connected factor such as the site category, the diameter of lead bar, the height of bearing, the designing carrying capacity, the span of bridge, the inherent period and the displacement of RB, determine the parameter, the absorbing vibration target, the method and the process of standardization to LRB; Then according to the two-step rule of resisting and defending earthquake, and combining with the response spectrum theory in the seismic vibration of bridge, make a lot of calculation and analysis of vibration absorb design to the real bridge collected and combined by Finite Element program; At last, gives the result of standardization through diagram and explains to its usage. It is anticipated that this paper would have some referential value to the design, application and production of Lead-Rubber-Bearing and accelerate its process of the practicality.