Rotational deformation of rotational displacement function for the upper structure of the resulting deflection. Produce a corresponding bump in the free side of the ball bearing. Maximum design strain rubber bearing and non-buckling condition. Ball bearings to withstand external force shown below, in the ball bearing at any point, by the design load effect influence of strain and is calculated using the following formula generated control: the advantages of laminated rubber bearings and ball bearings steel bearing more prominent compared with the following advantages: (1) ball bearing structure is simple, easy manufacturing, lower cost and save steel. (2) ball bearing performance, reliable, have good elastic properties grid bearing elastic stiffness, can reduce the impact of the role of dynamic load and piers of the bridge structure, thereby improving the bridge by force and overall seismic performance. (3) ball bearings during regular use without rust, paint and refueling maintenance work, almost no special regular maintenance, greatly reducing the conservation effort. (4) rubber material sufficient source material, but also appropriate for styling and standard series. (5) ball bearing low building height (such as for steel bearing on the general height of the small and medium span bridges for 90 ~ 180mm, while the corresponding laminated rubber bearing building height of only 28 ~ 56mm), ease of construction and installation and replacement. With cement mortar with a test, adjust and determine the test should be used with the actual use of materials engineering, mortar test should be used with mechanical stirring, mixing time shall not be less than 120s, ball bearings or look-up table according to the calculation of the mix by stirring When should the determination of its consistency and hierarchical degree of mixture, and when you can not meet the requirements, you should adjust the amount of material to know to meet the requirements so far, and then determine the mortar with a baseline test when compared with the bearing, should at least try with using three different mixing ratio, the ball bearing one of the preceding paragraph with reference spherical bearing size than the truss, the ball bearings should be the benchmark with other cement mix ratio of 10% increase or decrease, respectively, in ensuring the consistency of the eligibility conditions stratification, water can be adjusted accordingly. After three different mixing ratio adjustment grid pot rubber bearing, should be required to existing relevant standards of molding, strength testing mortar, ball bearings and selected in line with the strength of the test requirements and cement As a manhole with the lowest amount of mix. Reference with cement mortar cement mortar mix ratio. Spherical bearing truss bearing size _ _ finished bearing prices please contact provided by Hengshui Hengshui Hao-Hao Tong Rubber Company. Hengshui Hao-Engineering Rubber Co. (www.htgcxj.com) strong, credible, Hebei Hengshui site construction materials industry has accumulated a large number of loyal customers. The company better work attitude and continuous improvement through innovative ideas will lead Hao engineered rubber and you hand in hand into the brilliant, for a better future!