Elastic spherical steel bearing life of 50 years _ _ finished one-way elastic spherical steel bearing activities provided by Hao-engineered rubber. Elastic spherical steel bearing life of 50 years _ _ finished one-way elastic spherical steel bearing activity is Hengshui HaoTong Engineering Rubber Co., Ltd. (www.htgcxj.com) 2014 has been newly upgraded launched using ball bearings Problems , design, design units currently found in some of laminated rubber bearings and bridge and culvert design specifications, industry standard design requirements do not match. Such as flat-size design is very large, but the thickness of thin bearing, spherical bearing checking the projects carried out in accordance with the relevant provisions of the bridge specifications and industry standards, and its compression elastic spherical steel bearing unidirectional activity, turn performance to meet not require, the shear deformation even smaller, even as the use of fixed bearing, spherical bearing beams must also meet requirements before the end corner. Such a ball bearing, in the course of Void and prone to accelerated aging bi-elastic spherical steel bearing activities, resulting in the destruction of ball bearings early, so fixed elastic spherical steel bearings, JT / T 4-2004 in provisions of the measured bearing angle value, rubber bearing reinforced concrete bridge greater than or equal to 1/300, 1/500 greater than or equal to the steel bridge and, when factory production and issuing production licenses, as the content of the test must be carried out. In addition, designers in the selection of laminated rubber bearings, the ball bearing and the bearing capacity of the bridge actually supporting reaction force should be consistent with the general range of about 10 percent of excellence, you can meet your requirements, not the choice of bearing bearer The larger force than necessary bearing capacity of more secure, ball bearings, especially the choice of ball bearings, the bridge should be as close to the actual capacity, because PTFE sheet and endless dry plate friction when positive pressure decreases with increasing Great. In the choice of ball bearing, should also be noted, as long as the beam end bearing deformation turn to meet the requirements, the more favorable the thickness of the thinner seat, and then the whole bridge structure to withstand the horizontal forces due to bearing bearing shear deformation does not depend on the completion of the design, but also give full consideration to fixing ball bearing, bearing activities and forms part of the curved bridge abutment structure and reasonable layout. In our country has always been a bridge and culvert specifications and industry standards, design and construction of ball bearings and acceptance requirements must be made in both the beam end bearing, bearing elastic spherical steel bearing, snug contact with the pier and down, so that the ball bearing force uniform, with no void phenomenon, rubber bearings in the best force uniform, with no void phenomenon, to ensure the ball bearing in the best stress state, when the beam has a longitudinal, should be leveling processing . Currently, the world bridge normative standards such as the US AASHTO-LRFD Highway Bridge Design Code (2004) EN1337-3 European standards (2005) and others require, when at the annual average temperature and all the dead load, the relative level of beam bottom consult more than 0.01 When rad, ball bearing steel must be used to make bridges corner wedge zero level to ensure the bearing seat by force, so our bridge design specifications and bearing industry standards are clearly defined when the bottom longitudinal beam must be greater than 1% leveling treatment, but when the two longitudinal slope of less than 1%, when selecting the ball bearing deformation regulations will take into account, this can not be ignored.