Hao-engineering rubber _ _ Yancheng rubber bearing steel grid grid rubber bearings provided by Hao-engineering rubber. We are Hengshui HaoTong Engineering Rubber Co., Ltd. (www.htgcxj.com) located at: Hebei Hengshui specializes in: grid bearings, bridge expansion joints, water stop, bridge bearings, rubber bearings, spherical bearings with steel development of the highway bridge technology, the type of bridge bearings are constantly updated and increased until the 1960s grid isolation rubber bearings, bearing a greater say in the type of highway bridges are almost always use reinforced concrete bearing steel bearing drink, almost small span bridges processes (such as oil blankets, etc.) with only a simple method. With the development of the chemical industry, the emergence of the use of PTFE slide rubber bearings drink plane sliding bearings, by the early 1960s began, laminated rubber bearings and rubber bearing basin gradually into the development and application, in particular to the 20th century, 80 to 90 years, have worked out a highway bridge culvert design standard drawings (1980). transportation industry standard "highway bridges laminated rubber bearing specifications series" (JT 3132.1-88), "highway bridge technical conditions of laminated rubber bearings "(JT 3132.2-88)," highway bridge laminated rubber bearings mechanical properties of the finished product inspection rules "(JT 3132.3-90) and" highway bridge pot bearings "(JT 3141-90) issued and implemented grid plate rubber support seat so pot bearings quickly become the main highway bridge abutment form. Abroad in the 1970s started to develop spherical bearings, and soon in the curved bridge applications. Germany prestressed concrete bridge built in recent decades has been the use of bearing condition survey grid rubber bearings, the results indicate that in 1964, 100% of the steel truss bridge with steel bearing rubber bearings from 1958 began to use pot bearings, in 1970 began after extensive use of pot bearings, and bearing pot bearing the total amount of the proportion is growing. Although the shear structure shear structure plays the same role with the slide structure, a single must fully consider the drastic change in the horizontal position when the elastic properties, ultimate deformation properties and so on. If doubles as a vertical support function, in the case of large displacements, must meet the vertical load bearing area, then the level of elasticity may also be constructed as small as possible in order to resolve the insulation (isolation) problem, but not because it must be noted too small vertical elastic buckling phenomenon. If the level of support by way of classification bearing different ways of supporting the classification, you can organize into a fixed bearing type, event type and the use of rubber bearing shear deformation of elastic support-type categories. The so-called fixed-fixed support type support type, the (fixed horizontal direction) in the horizontal direction of the upper structure of the constraint displacement without rotation of the restraint structure. Usually a fixed bearing fixed bearing type and activity type is supported jointly supported bridges, in order to withstand the friction generated by the reaction force bearing activities. Such as continuous use of multipoint fixed way of bearing, must consider the temperature changes, shrinkage and creep of concrete and other ultra-quiet courage of your convictions resulting in deformation of the upper structure. Fixed bearing type bearings that can withstand earthquakes horizontal force structure should be used.