Our country is a country of many earthquakes occur in the event of an earthquake jingchan bearing lateral baffle and anchor cut phenomenon. After the 2008 Wenchuan earthquake steel ball bearings, there are a lot of bridge bearings undergone seismic shear bolt steel ball bearing on the price is much treasure as railway bridge to recovery after the earthquake brought difficulties. How to ensure that in the event of an earthquake bridge support work performance, so do not destroy the bridge bearings or minimize damage, and after the earthquake bearing function can be restored as soon as possible, this is a topic of current research needs. Seismic steel ball bearings to withstand seismic forces seismic type ball bearing steel production and sales, there are usually two alternative ways, one way is to increase seat anchors, it is sufficient to withstand the shear forces caused by earthquakes, this time seismic forces will be fully transferred from cradle to the pier, there is likely to cause damage to the pier, so that a small amount of displacement of the bearing can occur, but does not occur off the beam, and the bearing bolt cut does not occur, which can be appropriately reduced seismic force the role of the pier. For this purpose it is necessary to study one kind of seismic steel ball bearings. Qiantang River Bridge is 45m + 65m + 14 × 80m + 65m + 18 holes 45m prestressed concrete box beam bridge ties, length of 1340m, located only two fixed piers in the middle of a full-bridge, full bridge longitudinal horizontal seismic force of will be undertaken in the manufacture of friction by setting the two fixed bearing and fixed on each pier to pier on the resistance activities, for in addition to setting up the necessary bridge design seismic stoppers, the use of seismic steel ball bearings. Seismic steel ball bearings with the following characteristics: vertical stiffness, bearing good performance, stability supported bridges superstructure load; horizontal stiffness is always to meet the needs of large displacement earthquake; and by adjusting the lead core area, you can change LRB damping ratio, which can effectively absorb seismic energy; To meet these performance requirements, the main performance parameters of lead rubber as follows: (1) The first form factor refers to the shape factor of the first single-rubber bearing plate the ratio of the area and the side area of ??the plane, consistent with the shape factor of ordinary laminated rubber bearing, he decided the compressive modulus of elasticity of LRB, LRB's usually the first form factor ≥15. (2 ) The second factor is the shape of the form factor of the second side of the area means an area of ??flat rubber bearings and bearing thick rubber calculate the ratio of the total steel ball bearing friction coefficient is the number, the second form factor is typically used to determine the stability of the bearing, The second factor is ≥5. (3) allowable compressive stress bearing allowable compressive stress and the maximum shape factor depending di9er seismic displacement, pressure is typically allowed to be ≥8Mpa. Steel ball bearing steel ball bearing price elasticity _ _ Guangrun tell you! (Certified Merchant) provided by Hengshui Rubber Co. Guangrun. Hengshui Guangrun Engineering Rubber Co. (www.grgcxj.cn) is specialized in the "seismic steel ball bearings, spherical steel unidirectional bidirectional slide bearing, fixed-elastic damping ball bearing hinge" of the enterprise, the company is adhering to the "integrity management , hard service "concept, to provide you with the highest quality products and services. Welcome to inquire! Contact: Mr. Wang.