Shanxi Jishan County bridge bearing type

Many classes shaped bridge support, according to the bridge span, the reaction forces and building height requirements for seat selection of commonly used bearings are the following: seat cushion from felt, asbestos cement or cement mortar cushion Simple seat made, 10m below the span simply supported plate girder bridge, do not set up a special seat, but will be placed directly on the plate or beam above the cushion. Deformation of poor performance, in addition to the fixed bearing design cushion, but also the application to connect the upper and lower anchor structure. Pedestal 1. Curved steel bearing: also known as tangential bearing or linear bearings. The holder is a flat lower abutment arcuate plate, both from one another tangent line contact bearing. Steel uses about 40 ~ 50mm of steel plate or hot rolled steel plate, the disadvantage is to overcome the frictional resistance when moving large, steel capacity, processing trouble, generally used for small bridge. 2. Pedestal: using carbon steel or high-quality steel, after molding, foundry, casting, machining and heat treatment process made stand. There are large size, large consumption of steel, easily rust and maintenance cost disadvantages. A new steel bearings. Stainless steel or alloy steel bearing 2. 3 skateboard bearing steel. Spherical bearing: also known as point bearing, to adapt to the requirements of the bridge manifold rotation, the upper seat, the two parts of the lower contact surface are formed the same radius of curvature of the convex and concave spherical bearing. A reinforced concrete bearing. Pendulum bearing column: Activities section of reinforced concrete columns pendulum activities constitute a seat. Appearance and activity mechanism and cutting edge single roller bearing steel bearing the same, but it is used in the construction of reinforced concrete columns with rectangular cross-section instead of the middle part of the roll axis, the top and bottom of the roll axis is curved plate, commonly used in the span of more than 20m of reinforced concrete or prestressed concrete beam bridge. 2. Concrete Hinge: by reducing the cross section of the concrete section to reduce the stiffness, and therefore can produce a small amount of rotation of the shaft enough to withstand the force of a simplified support. By layers of laminated rubber bearing rubber sheet and embedded in the meantime all kinds of stiffener constituted only by a piece of rubber or bearing plates. A rectangular shape, a trapezoidal, circular, etc.. Pot rubber bearing rubber blocks placed in a steel bowl tightly large tonnage rubber bearings. Because rubber block is three to pressure, thus making the ultimate bearing capacity of bearing has been strengthened. Rally, also known as a negative reaction force bearing supports, can withstand the negative reaction force support. Rally Rally divided hinge bearings and connecting rod bearings into two categories, the former bridge bearings are divided into fixed and movable type. Shake the hinged seat anchors fixed to the beam end, under the seat pan on top of the pier or anchor abutments, between steel pins are connected; movable seat lower anchors on top of the pier shake or desk top anti-pull block room, and here under Canadian rollers, it is able to tension, but also to move longitudinally. Shock absorber damping bearings attached to having seat cushioning and shock functions. Hydraulic shock absorbers and rubber shock absorber into the mechanism of the shock absorber damping force is mainly elastic use of the liquid medium viscosity or rubber to reduce the impact generated by the force of the earthquake. Shanxi Jishan County bridge bearing type