LRB System With Energy Forms And The Optimal Parameters Of The Rate Of Lead

With the LRB's widely used, its complex design cases can not adapt to the actual needs for their large-scale replication. In recent years, many academics studied in mechanical mode,mplifying design and optimize bearing design of lead rubber bearing, However, most of them didn't go into details about the actual ratio of stiffness before and after the yield of lead rubber bearing, but taken the ratio of stiffness before and after yielding as 6.5 or 10,referenced to conclusions in Japan or New Zealand. This assumption ignores the impact of the rate of lead on stiffness of LRB before yielding, and when the actual rate of lead vary greatly to bearing models in Japan or New Zealand researches, The results will lead to large errors.In this article,1000,750,500 tons LRB will be researched, to find out energy consumption forms and the scope of a reasonable rate of lead for the damping system of lead rubber bearing, while bridge pier under different axial compression ratio. In this article, control parameters such as the total energy consumption of damping system, energy consumption of LRB, energy consumption of the plastic zone at the end of pier,and their percentage of the total energy consumption, as well as displacement of the top of pier and bearing, are use as the index to the LRB parametric design, to find out the scope of a best rate of lead of LRB under different conditions, in order to achieve optimal index of energy consumption and the main beam deflection.…………………...