[Slide ball bearing hinge install basic requirements [slide] ball joint bearing pad stone] and quality inspection and assessment stopper According to China "Highway Engineering Quality Inspection and Evaluation Standards" civil engineering (JTC F80 / 1-2004) the provisions of support cushion stone and basic requirements stopper, found the project to identify quality requirements and appearance, with clear inspection and assessment, which is the final project acceptance criteria. Currently steel industry problems [slip] the superiority of steel ball bearing hinge, recycling economy and sustainable development has been recognized by society and gradually expand 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 restricting the development of the steel structure has the technical aspects: 1, slightly higher than the 10 percent the cost of a single structure of reinforced concrete structures, reduced foundation, sand cement, transportation, the cost and time of the car does not really stand costs. 2, steel less talent, developers and designers willing to adopt proven convenient brick structure, reinforced concrete architecture. 3, steel corrosion, fire protection technology and products do not know enough, blind mandatory cost increases, the impact of application. 4, related to steel standards, regulations, norms imperfect slide ball bearing hinge, modifications to the development lag, a serious shortage of research and development funds, market-oriented concepts to prepare standards, inevitably mixed. [Slide] steel ball bearing hinge design Experience of stability 1) more than the current design of steel structures by means of computer software for structural steel force calculation, strength and overall stability calculation in the plane of the structure and components of the program can rely on auto-complete , plane structures and components of strength and stability calculation, designers need to do another analysis, calculation and design. At this level you can press the entire structure into a plurality of different arrangements in the form of architecture, at different levels of load bearing high-quality finished sliding ball joint, the strength and stability of the structural system calculations. 2) steel plate in bending member of local stability in two ways: First, buckling as the carrying capacity limit state, and by limiting the thickness ratios, making it not as a whole before the expiry buckling member; the second is to allow the board former member integral member buckling failure, and the use of its carrying capacity after buckling strength member is determined by the effective cross section after local buckling. [Slide] ball bearing hinge pipe sections for compression members, should control the diameter and wall thickness ratio of building low-cost direct bearing sliding ball joint, stiffener press "Steel Design Code" (GB50017-2003) first 5.4 provisions setting. [Slide ball bearing hinge] PQXZ Series Basin Seismic ball bearing installation Conservation Rule 1. Use of this series bearings, the bridge beam and pier bearing parts of the concrete strength not less than C40 GB-way sliding ball joint support seat manufacturers, special circumstances required by the design unit. 2. The holder of beam and pier using embedded bolts, if necessary, may also be embedded steel plate welded connections, but in welding, to prevent bearing steel temperature is too high, so as not to burn the grease and tetrafluoroethylene vinyl sheets. 3. Supports mounting height should meet the design requirements, so bearing formation; bearing bearing surface height can not be played in the four corners of 2mm.