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V-Max pot bearings Agom V-Max pot bearings are designed to carry combinations of vertical loads, horizontal loads, longitudinal and transversal movements and rotations and they are used in steel and concrete road and railway bridges. A completely encased rubber pad is positioned in a steel pot. Under high pressure the pad behaves like a liquid. The elasticity of the rubber allows tilting movement (rotation) of the piston in the horizontal axis. Depending on whether the bearing is fixed, guided sliding or a free sliding, Agom V-Max bearings accommodate vertical loads and corresponding horizontal...

4GOM IDEAS, ENGINEERING AND MANUFACTURE Quality of the materials Elastomer material The elastomer material used for the elastomeric pad is natural rubber or chloroprene rubber in accordance with ISO 6446. Friction of the bearings The reaction of the bearing to the movement can be mathematically calculated by considering friction coefficient between stainless steel and PTFE, the design friction values are in according to EN 1337-2 section 6.7. Ferrous material for pot and piston: The pot, the piston and if applicable the sliding plate are manufactured from ferrous material in accordance with EN...

Concrete and elastomer pressure According to EN 1337-5 the allowable concrete pressure depends on the relative dimensions of the bearing structure interface to the total support area and the characteristic strength of the concrete Fixing types Usually all the V-Max bearings are equipped with suitable anchor bars for anchoring purpose to lower and upper structure. In case of pre-cast concrete beam the bearings can be provided with upper pin and top subsidiary plate; in case of steel beams the bearings shall be provided with upper pin and/or connecting bolts. To adjust the angle of inclination...

Agom V-Max Bearings accessories Movement indicator The movement indicator allows the monitoring of the sliding bearing displacement by using a reference arrow fixed to the bearing base and a graduate indicator moving with the sliding plate. The movement indicator allow to check the initial presetting of the bearing (if required) and to verify the bearing motion during the future inspections. Reference surfaces According to EN1337 code the bearing can be provided with “reference surfaces” to ensure the perfect horizontal position during bearing installation. The lower reference surface is parallel...

Guidelines for the design of a structure with Agom V-Max bearings In this section a simple guideline for the design of a structure equipped with Agom bearing is presented, the design procedure is summarized in the following steps: 1. Selection of the structure static link scheme (fixed and movable support bearings) Calculation of the loads (vertical and horizontal) on the bearings according to the fixity scheme Calculation of the bearing rotations and movements Insert all the bearing design data in to the bearing design table (example table B.1 of the EN1337-1 code attached at the end of the...

DESIGN OF A STRUCTURE WITH V-Max BEARINGS SELECTION OF THE STRUCTURE STATIC LINK SCHEME (FIXED AND MOVABLE BEARINGS) CALCULATION OF THE LOADS (VERTICAL AND HORIZONTAL) ON THE BEARINGS ACCORDING TO THE SELECTED FIXITY SCHEME CALCULATION OF THE BEARINGS ROTATIONS AND MOVEMENTS FILL IN THE BEARINGS DESIGN TABLE DATA (EXAMPLE TABLE B.1 OF EN1337-1 CODE) USE THE V-MAX BEARING DRAWINGS IUSSUED BY AGOM TO DESGIN THE STRCTURE INFERFACE UNDER AND ABOVE THE BEARING IF NECESSARY, DESIGN THE SLOPED WEDGE TO BE PLACED BETWEEN STRUCTURE AND BEARING

IDEAS, ENGINEERING AND MANUFACTURE The Agom V-Max bearings fulfil the following requirements: a. Transmit the vertical loads due to permanent and accidental effects; it is possible to cover a wide range of loads about up from 500 to 100000 kN b. Transmit the horizontal loads with in practise no limitation of the design load c. Allow rotation as per a spherical hinge. Standard design is for rotation of +0.01 rad or +0.02 rad d. No limitation for of horizontal displacement e. Suitable for all structures steel and concrete bridges and buildings NO LIMITS HORIZONTAL LOADS NO LIMITS HORIZONTAL DISPLACEMENT...

Qualification, approval tests and certifications All the qualification and approval tests are performed by independent and worldwide recognized laboratories to assure that the V-Max bearings’ performances comply with the project and with international standard requirements. Agom V-max bearing during friction test ALLGEMEINE BAUAUFSICHTLICHE ZULASSUNG DYNAMIC FATIGUE TESTS Agom V-max bearing during the 2 millions load cycles for ADIF (Spanish high speed railway authority) approval

Handling and storage installation and maintenance This manual gives the main list of the most important operations to correctly install the AGOM bridge bearings. Under control of the Engineer who designed the bridge, bearings must be installed by expert workers, with precision to meet the bridge and bearing design criteria. Inappropriate handling, storage and installation will have an adverse effect on the bearing life, usually estimated in more than 50 years providing right maintenance. AGOM structural bearings are manufactured to close tolerances by skilled technicians working in clean conditions....

Installation The installation procedure of the bearings generally depends on the structure type. The main steps are: 1. Check before installation. In order to avoid placements mistakes of the bearings, all the technical and description data, printed on the label, shall be checked and compared with the ones showed in the shop drawings. 2. Casting of the substructures. Substructures shall reach a level about 30 mm lower then the final level. In order to install the bearings suitable voids spaces must be provided to insert the bearing lower anchor bars. An easy way to leave the voids is to use corrugated...