Hao Tong Engineering Rubber | grid rubber bearings | 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 by structural steel bearing weight bearing reaction force due to the standard value of 0.5 times the vehicle load (included in the impact factor) bearing reaction force due to the standard value; see Section 8.4.2 specification JTG D62-2004, but excluding automobile braking force caused by shear deformation, the plane bearing gross area, the standard values ??braking force caused by the car load. PTFE slide rubber bearing friction coefficient should meet the following requirements in some of them. The design calculation example in order to help readers understand the bridge design specifications of the relevant provisions "of reinforced concrete and prestressed concrete highway bridge design specifications" (JTG D62-2004), basically in accordance with the provisions of the order specification requirements. Basic data design (according to the specification section 8.4.1) of the use of the seat installed in the warm area, so the concrete abutment contact at room temperature, the friction coefficient σ = 0.3; bearing an average compressive stress of 10mpa. The role of a laminated rubber bearing (or load) effect standard value 400 rubber bearings, bearing the weight of the anti-force 380kn, vehicle load reaction force for 290kn, weight and vehicle load reaction force for 670kn, temperature drop, concrete shrinkage and bearing shear deformation caused by creep 16.5, automotive braking force for 3.2kn, bearing directly located at 0.5% below the bottom longitudinal beam, along the longitudinal direction of the reaction force is divided into: weight and vehicle load, weight deflection In the pivot angle of φ = 0.0023rad, bearing top surface generated by the longitudinal beam angle position φ = 0.005rad, laminated rubber bearing geometry and mechanical properties. Supports use of 250mm * 300mm * 63mm rectangular laminated rubber bearings, single rubber thickness is 8mm, total rubber layer is 45mm, bearing steel stiffening short side length of 240mm, bearing stiffened plate length 290mm, hair flat area of ??75000mm , bearing compressive model coefficients production capacity. Charpy bridge or continuous beam bridge straight scissors bridge support beam bridge or continuous beam bridge span is generally not great, especially scissors supported beam bridge span is relatively small, usually considered optional or laminated rubber bearing basin branch seat. Whether economically or facilitate the construction of bearing manufacturers should consider using the form rubber bearings, especially due to the relatively low seat height. Stability or, its elastic grid of seismic forces dispersed rubber bearings to absorb a certain effect, so far, these form a bridge gpz rubber bearings, unless there are special considerations, in general, have adopted this forms of support. Curved Curved Bridge because of its moving direction and the direction of rotation is inconsistent, for this bridge, it is generally desirable to mount in the form of a full range of movement and rotation, which is the basic requirement. Currently, as a holder in the form suitable for this situation, consider rubber bearing (such as round laminated rubber bearing, etc.) and other steel bearings and ball bearings. Stretching and rotating bridge of moving parts are likely to appear in different directions, so that the active support of the curved bridge can be considered the same as using the full range of movement and rotational bearing form.