Since the elastic rubber bearing has good cushioning properties deformation and seismic activity ball bearing, so there is a certain seismic rubber bearing performance and better shock absorption cushioning effect, but the design of the research on the seismic bearing started relatively late, it can be said that is just the beginning, particularly the impact on the shear properties of rubber and stiffness caused by errors by pulling state of durability, fatigue resistance, durability of rubber and steel plate bonding, rubber protective layer weather and other aspects are subject to further study these problems in the future can do a lot more work. Currently, depending on the type of classification, rubber bearings can be summarized as laminated rubber bearing, shock absorption and isolation bearing (LRB) and ribbon rubber bearings, bearing the form described by this chapter respectively. Laminated rubber bearings is not a new product, and it is the child in the 1930s started to develop abroad, has been 70 years of history, it can be said is a relatively mature product, bi-directional ball bearing activities abroad Rubber engineering pundits Mr. E.GKimrnich different form factor, different rubber hardness specimens were thousands of times of stress - strain experiments, the first application of laminated rubber bearings on the outskirts of the French Sainfpenis station bridge, to 20 After the 1960s, complete with a plus grout exposed film or cover maintenance. Do not add cement or after any additives, pulp initial setting in non-shrink grout shall not feed the extra vibration. Non-shrink grout after use, should use water to clean all tools and equipment immediately after curing, non-shrink grout can only be removed mechanically. Global earthquake occurred about five million times each year, resulting in a strong earthquake disaster to occur on average every year several activities ball bearings, there are a variety of causes earthquakes, but tectonic earthquakes accounted for over 90% of the global total of earthquakes, It is a campaign-style crust of the Earth's interior is divided into several large plates, each plate minus backlog makes fault occurs between the plate distortion, while generating huge accumulation of stress-based poly, when concentration reaches a certain level of stress and over crust formations When subjected to the limits of rock burst suddenly released energy corridor activity ball bearings, resulting in a series of shock waves, resulting geoid and fro phenomenon, known as earthquakes. Reasons for their produce earthquakes can be divided into tectonic earthquakes, volcanic earthquakes and earthquake collapsed three basic rationality, in addition to seismic reservoir, water earthquake, pumping earthquakes, explosions excited earthquakes and landslides caused by earthquakes, caused by the more general Large earthquakes are tectonic earthquake disaster, especially in disaster focal depth of less than 60km of the largest shallow earthquake. Hao-engineering rubber, seismic activity ball bearing, ball bearing activities provided by Hao-engineering rubber. Search for "grid bearings, bridge expansion joints, water stop, bridge bearings, rubber bearings, spherical steel bearing" fly suppliers, network operators choose to have a full alliance Certified: Engineering Rubber Co., Ltd. Hengshui HaoTong (www.htgcxj.com), trustworthiness and reliability, "business alliance customer service" on page now click on live chat with us now!