[Slide] ball bearing hinge install basic requirements] [sliding ball joint bearing pad stone and quality inspection and assessment of the stopper according to "Highway Engineering Quality Inspection and Evaluation Standards" civil engineering (JTC F80 / 1-2004) The provisions of the support cushion stone stopper and basic requirements, identification of actual projects and appearance quality requirements, there is a clear inspection and assessment criteria, which is the final project acceptance criteria. Currently steel industry problems [slide] superiority steel ball bearing hinges, the circular economy and sustainable development has been recognized by society and gradually expanded the scope of the market, but by the national industrial policy support and attention of the competent authorities far not enough, the current strength of the national development is very weak, poor innovation, the main problem has restricted the development of the technical aspects of steel: 1, slightly higher than the 10 percent cost of a single structure of reinforced concrete structures, while reducing ground, sand cement, transportation, the cost and time of the car does not really stand out costs. 2, steel less talent, developers and designers willing to adopt convenient mature brick structure, reinforced concrete architecture. 3, for steel corrosion, fire protection technology and products do not know enough, blind mandatory cost increases, the impact of application. 4, about the steel standards, regulations, norms imperfect, revised establishment lag, a serious shortage of funding for research and development, market-oriented concepts to prepare standards, inevitably mixed. [Slide] stability ball bearing hinge is one of the elements of steel structure engineering design considerations need to focus on engineering accident case in real life due to the instability caused by the steel is greater, such as flat-American Stadium 92m Hartford City × 110m grid structure, the sudden fall in 1978 finished a one-way slip floor truss bearing manufacturers, due to strut buckling; 1988 have occurred in our country 13 · 2m × 18 · 0m steel truss due less stable webs slump in the construction process of the accident; January 3, 2010 in the afternoon, Kunming new airport 38m steel bridge span suddenly collapsed, killing seven people were killed and eight people injured, 26 people were slightly injured, because the bridge steel support system suddenly instability, 8m high bridge then collapsed down. As can be seen from the above case, [slide] steel ball bearing hinge FAILURE usually due to its structural design is unreasonable, due to the presence of structural design flaws, to prevent the occurrence of such accidents to slip fundamentally pay Hengshui wide seat to run, stability steel design is the key. [Slide ball bearing hinge] GPZ (111) damping pot bearings GPZ (111) is one of the damping pot bearings Guangrun Hebei Hengshui Rubber Co., Ltd. production bearing products, is a kind of energy dissipation damping effect of the bridge support for basic intensity 8 degrees for the bridge project area. This class has a one-way bearing activities (DX-type) and fixed (GD type) of two types. [Slide] bearing ball bearing hinge design parameters 1) Design of vertical bearing capacity of 0.8--80MN, divided into 31 specifications. 2) Design horizontal bearing: Fixed bearing in each direction and a one-way bearing activities of non-sliding direction (perpendicular to the longitudinal direction of the guide block) level for bearing design vertical bearing capacity of 20%. 3) Design Corner bit 0.02rad.