The Elaborate Study On Design Parameter Of Lead Rubber Bearing

Lead rubber bearings (LRB) is the ordinary rubber bearing accession to the appropriateamount of lead, It is one of isolation devices, this paper introduces the structure, workingprinciple and mechanical behavior of lead rubber bearing, focus on studying the designmethods of the reasonable distribution rate of lead of lead rubber bearing under differentintensity district.With the LRB’s widely used, its complex design cases can not adapt to the actual needsfor 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 themdidn’t go into details about the actual ratio of stiffness before and after the yield of lead rubberbearing, but taken the ratio of stiffness before and after yielding as6.5or10,referenced toconclusions in Japan or New Zealand. This assumption ignores the impact of the rate of leadon stiffness of LRB before yielding, and when the actual rate of lead vary greatly to bearingmodels in Japan or New Zealand researches, The results will lead to large errors.In this paper, taking1,000tons of LRB as an example, it is considered the differentconditions with lead rate and the seismic fortification intensity of7degrees and8degreesdistrict, ultimately leading to a reasonable allocation of rate design for the lead rubber bearingunder different intensity district by iterative calculation method. Furthermore, when LRBplays an stable energy-consuming role, it can be concluded the range of shear strain andstiffness ratio before and after yielding of LRB at seismic fortification intensity of7degreesand8degrees district.