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What is the purpose of bridge bearing

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A bridge bearing is a part of a bridge which typically supply a resting surface between bridge piers and the bridge deck.

The main purpose of a bridge bearing is to authorize controlled movement and accordingly reduce the stresses combine. Possible causes of movement are thermal expansion and contraction, creep, shrinkage, or fatigue due to the assets of the material used for the bearing. External sources of movement include the agreement of the ground below, thermal expansion, and seismic activity.

There are various different types of bridge bearings which are used depending on a number of unlike factors including the bridge span, loading conditions, and achievement specifications.

The elderly form of bridge bearing is simply two plates resting on top of each other. A general form of modern bridge bearing is the elastomeric bridge bearing. Additional type of bridge bearing is the mechanical bridge bearing. There are various types of mechanical bridge bearing, such as the pinned bearing, which in turn includes specific types such as the rocker bearing, and the roller bearing. Different type of mechanical bearing is the fixed bearing, which allows rotation, but not other forms of movement.

Types of bridge bearing

Steel bearings (flat bearings, curved bearings, rocker bearings, and roller bearings): Forces through steel contact surfaces. Bearing displacement is specially achieved by rolling steel and steel.

PTFE bearing (sliding bearing): The seat adopts PTFE and steel plate as the relative sliding surface of the bearing, and the sliding friction coefficient is much smaller than that of steel and steel.

Rubber bearings (plate rubber bearings, basin rubber bearings, PTFE plate-type rubber seats): The bearing force is achieved by a rubber plate. The movement of the carrier is achieved by sliding of PTFE or the shearing of rubber, and the supporting angle is deformed by the compression of rubber.

Concrete bearings (concrete hinge seats). Lead support: The strength part is composed of hard lead. As per to the structure of the bearing type, it can be normally divided into curved bearings, rock shaft bearings, roller bearings, plate rubber bearings, PTFE plate rubber bearings, basin rubber bearings, spherical bearings and so on. The bearings will be described separately below. Bearings are structural part that withstand high stresses. The load of the superstructure is concentrated in very small areas by the bearings. The reaction force of the roller bearing passes the linear contact force linking the roller and the rolling surface, and the force flow construct a significant stress consolidation phenomenon, which makes the contact surface bear high contact stress. And plate rubber bearings, tank rubber bearings, and spherical bearings and other bearings transmit reaction force, through the plane to the plane, the transmission is smooth, no strong flow necking phenomenon, which is a more reasonable power mode.


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    Use of expansion joint in building

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    Expansion joint is very essential in building to reduce the cracks because of thermal variation. Bureau of Indian standard fixed the some length of buildings above which the one or more expansion joint is required in building.

    Expansion joint is very essential in building to reduce the cracks because of thermal variation. Bureau of Indian standard fixed the some length of buildings above which the one or more expansion joint is required in building.An expansion joint is provided in concrete to authorize the movement of structural elements due to temperature, moisture & other changes.

    It recognize concrete structure to expand or contract due to thermal variation without causing stress, which can lead to reduce the cracking in a building.

    Expansion joints break the long concrete structure in separate parts that help to prevent the transformation of earthquakes vibration on other parts of buildings.

    If an earthquake occurs, the long structure act as a two or more dissimilar structure due to expansion joints.

    It is also known as movement joints, can be use not only in buildings but also in bridges, sidewalks, railway tracks, piping systems, ships, and other structures. Expansion joints can be incorporated into various building parts to supply complete separation like floors, ceilings, walls, roofs, and facades. They can be placed floor-to-floor, floor-to-wall, wall-to-wall, ceiling-to-ceiling, ceiling-to-wall, roof-to-roof, or roof-to-wall.

    It may serve more than one “joint” purpose at the same time. Generally, these joints isolate a frame into a series of segments with sufficient joint width to allow the building’s thermal expansion. By isolating the segments, expansion joints also recognize relief from cracking due to contraction and therefore act in a dual role an expansion and a contraction joint.

    Where are expansion joints required?


    Expansion joints are awaited to fulfill certain criteria like:

    Having high load-carrying volume (e.g. vehicle wheels load)
    Water tightness in the joint and its link at each side to prevent leaking.
    Suitability for pedestrian traffic (e.g. with high-heeled shoes)
    Resistance to aggressive substances
    Reducing vibrations in provision where delicate goods are being transported (e.g. in glass factories)
    Should be eye-pleasing.
    Types of Joints
    Interior Floor Joints
    Exterior Floor Joints
    Interior Wall/Column Celing & Exterior Wall
    Parking Joints



    Architectural expansion joints recommended in:
    Commercial Buildings , Residential Buildings.
    Hotels, Hospital, Institutional Building, Offices.
    Educational buildings.
    Metro stations & Railway stations.
    Parking, Podium structures.


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      Types of Bridge Bearings and their Details

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      Bridge bearings are structure equipment or devices that are installed between bridge substructures or superstructures. The bearings are used to transfer the applied load on the bridge, including earthquake load, wind load, traffic load, etc. Bridge bearings are also responsible for the relative movements between the superstructure and substructure. For example, rotation and translational movements in horizontal or transverse directions.

      Bearings used in constructing bridges are divided into two major categories – expansion bearing and fixed bearing. While the expansion bearings can permit translational and rotational movements, the latter only allows rotational and some translational movements. DECG International is one of India’s best bridge bearing manufacturers that offer all the various types of bridge bearings and also guarantee high quality.

      Types of Bridge Bearing

       The different types of bridge bearings and their uses in various constructional areas are as follows:

      Pot Bearings:

      pot ptfe bearing manufacturer in india

      A bearing consisting of a metal piston supported by a disc of unreinforced elastomer that is confined within a metal cylinder for allowing rotational movement about any axis in horizontal plane and to bear and transmit vertical load. Pot bearings may be provided with sliding assembly (with or without restraint in the form of guide along a desired direction to bear and

      transmit horizontal force) comprising of stainless steel plate attached to metal backing plate sliding in horizontal plane over sliding material confined in recess(s) on the piston which shall be termed as Sliding / Guided Pot bearings. Depending on the desired degree of freedom Pot bearings may be of three types as follows:

      1. Fixed Pot Bearing
      2. Sliding Pot Bearing
      3. Guided Pot Bearing

      Rocker and Pin Bearings

      Rocker is an expansion bridge bearing that is composed of a curved surface at the bottom that can accommodate the translational movement and a pin on the top that facilitates the rotational movement of the bridge structures.

      Rocker and Pin bridge bearings are used in steel bridge structures and are considered when the bridge movement is known and described adequately. These bridge bearings can undergo severe corrosion and deterioration, making regular inspections and maintenance an essential part of the construction.

      Pin Bearing Manufacturer In India

      Roller Bearings



      Roller bearings are used to construct concrete or steel bridge structures. The roller bearing can be used in two different forms, namely – single roller and multiple roller bearings. Multiple roller bearings have several rollers installed under the two plates and can facilitate both rotational and translational motion for the bridge. One of the best things about roller bearings is that they are cheap to manufacture, but they have a limited weight capacity, making them suitable for specific constructions. On the other hand, multiple roller bearings are expensive and can short large vertical loads. These rollers need regular inspections and rehabilitation since they are susceptible to corrosion and damages.

      Elastomeric bearings

      Elastomeric bearings are elastomers manufactured from synthetic and natural rubber. These bridge bearings support both translational and rotational movements through elastomer deformation. Elastomeric bearings can carry large loads and prevent lateral bulging of the elastomers.


      Elastomeric Bearing Manufacturer in Indian

      The number of elastomer pads needed for the construction depends on the type of reinforcement used for the bridge. For instance, steel reinforces elastomeric bearings are the strongest, and plain elastomeric pads are the weakest. One of the best things about Elastomeric bridge bearings is that they are neither expensive nor require any maintenance after installation.

      Spherical Bearings:

      The Spherical bearings consists of a pair of matching concave and convex steel spherical backing plates with a low friction sliding interface in between them permitting the rotation by in-curve sliding. For the purpose of providing the translation

      Ability, bearings are combined with the flat sliding elements. Depending on the desired degree of freedom Spherical bearings may be of three types as follows:

      1. Fixed Spherical Bearing
      2. Sliding Spherical Bearing
      3. Guided Spherical Bearing

      Wrapping Up!

      DECG International is one of the best bridge bearing manufacturers in India. We ensure the proper manufacturing of the highest quality bridge bearings for all construction needs. We have an excellent infrastructure that helps us provide the best quality construction products to all our clients.

      Reference Sources:



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        Why Expansion joints are Important for Bridges?

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        Expansion joints are widely used during the construction of bridges. They are the component which is essential for the life of a bridge. Thus, they must be properly installed and maintained to function properly. The bridge expansion joints efficiently help with the movement and rotations of the superstructure of the bridge. When installed properly, only a small section of the complicated construction is visible.

        The bridges face a lot of challenges and stress. To handle such mechanical stress, expansion joints are used. But this comes to the challenge of corrosion and other environmental factors which can degrade the bridge expansion joints. It can be prevented by the use of robust hot-dip galvanizing.

        Numerous countries worldwide are making use of bridge expansion joints to provide adequate support and help to the bridges. Given the demand finding a reliable expansion joint manufacturer in India isn’t difficult. Given the importance of the expansion joints, you must know about the types and the factors to consider you need to know before purchasing them.

        Why are bridge expansion joints important?

        It is the proper installation and maintenance of the bridge which leads to failure. When the bridges do not have expansion joints installed, they lack adequate flexibility and smooth movement. Further, the structure can collapse, leading to great damage. Thus, it is essential to use bridge expansion joints during the bridge construction. Here’s why they are essential.

        • Helps a bridge in expansion and contraction based on the temperature change.
        • Offers protection that holds up the bridge
        • Help protect the concrete structures present underneath the joints
        • Use of high-quality bridge expansion can offer cost-saving results
        • Helps with the contraction and expansion due to thermal cycle
        • Protects the concrete structures from damage due to vehicle traffic
        • Helps in the natural shrinkage and concrete creep

        Given the important use of expansion joints, you must make a purchase from a reputable manufacturer as this will guarantee quality and safety.

        What are the types of expansion joints?

        The expansion joints are widely used to hold the parts together while safely tolerating the temperature expansion and contraction of the structure. They are designed to allow continuous traffic flow between structures while efficiently accommodating shrinkage, temperature movement, and other forces. It is the expansion joints that prevent the bridges from bending out due to extreme conditions. One can now easily find a number of expansion joints for various purposes. However, there are two most essential types of expansion joints, which include.

        • Open joints

        These bridge expansion joints allow the free flow of water and debris through the joint. They lead to debris build-up, which makes them an inefficient choice. Here’s the top open joint used for bridges.

        Finger joints

        Sliding plane joints

        Butt joints

        • Close joints

        These bridge expansion joints are efficient enough to prevent the movement of water and debris from penetrating inside. However, they must be designed specifically to enhance the movement and properties of the intended joint. Here’s the top close joint used for bridges.

        Compression seal

        Stripe seal

        Poured joints

        Asphalt plug joints

        Reinforced elastomeric joints

        Modular elastomeric joints

        Important factors to consider

        When using concrete as a building material, there are numerous things you need to consider. The most important of all is the weight and strength of the concrete. But besides this, there is another factor, i.e., the effect of the environment on the material. Thus, you need to consider the thermal cycles of the geographical area to ensure you choose the right expansion joint that will offer intended results.

        With the changes in the season and temperature, the structure can greatly be affected. Thus, during such times when the structure expands or contracts, it can take a toll on the joint expansion system.

        Besides this, the heating and cooling cycle of the structure can also lead to expansion and contraction. When the contraction is greater than the tensile strength, of the material then there is a great chance of crack. In contrast, when the expansion is restricted, then the material can crush or distort. Thus, to prevent such failures, you must ensure to fit the concrete bridges with a good material that allows for proper expansion and contraction without causing any damage to the structural integrity.

        However, there are a number of options available. Thus, choosing the best one can be difficult for your requirement. You must consider all the factors as it will help you make the best decision. Further, you need to purchase a good expansion joint manufacturer in India. This will help guarantee you get quality products. Also, they can advise you about the use of the right type of expansion joint for your specific purpose.

        Further, remember each of the compression joints has its specific application method and other parameters that must be followed to ensure proper application and results. It is the accurate sizing of the joints and the accurate assessment of the movement of the structure that must be considered before selecting a bridge expansion joint. Further, it is also essential to consider various other factors like manufacturers’ requirements, climatic factors, preparation plan, physical properties, and joint material limitations.

        Contact a good bridge expansion, joint manufacturer.

        The expansion joints will work to the best only when adequately installed and of high quality. It is the quality of the joints which guarantees smooth and efficient movement. Thus, it is essential that you contact a good bridge expansion joint manufacturer in India to make your purchase. DECG International is among the leading manufacturers who can offer you a guarantee of quality at a fair rate. We have been manufacturing components that help in the construction of bridges and other structures. We can help you get the best expansion joints that fit your requirement. The pricing of all our structures is kept at an affordable rate, meaning you need not have to worry about the cost of your purchase with us. So wait not in contact our company today to get the best bridge expansion joints.

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          Role of Elastomeric Pad bearing in Bridge Design

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          The bearings for decades have been used in the bridges to offer adequate support for the movement. Today the countries globally have started investing their resources and money to improve their transportation system and accommodate the needs of daily vehicles. But to face the daily weight of such a tremendous amount of vehicles, the bridges require proper construction and support. This is where the electromagnetic during are used to prevent any bridge failure.

          Natural disasters are a common cause resulting in shifting bridge sections, bridge failures, collapsing decks, etc., which puts a great threat to the property and human life. To avoid such issues, the bridges are designed for moderate movement. A bridge must be capable of facing heavy traffic, natural disaster, temperature change, high wind speeds, etc. Thus, this makes the bridge bearings a crucial part of the structure. Here is a detailed guide that will offer you the right insights about elastomeric bearing usage in the bridge.

          Elastomeric bridge bearings are popular for flexible structures

          The elastomeric bearings are highly used for the construction of bridges as they offer great flexibility. The bearings are generally made up of materials like heavy-duty industrial standard rubber or neoprene. They are placed between the substructure and superstructure as a bridge beam or support to help distribute the load of the superstructure evenly. The superstructure moves in a desired manner during unexpected environmental conditions. Thus, the use of elastomeric bearing pads in bridges helps eliminate the risk of stress, leading to collapse.

          Besides collapsing, the elastomeric bridge bearings also help boost the life of the bridges as it reduces the stress and wears and tear on the bridge materials and components. Further, the elastomeric bridge bearings help generate great savings for the government as they need not have to worry about replacing the components year after year.

           3D simulation of elastomeric bearings are now widely used

          Elastomeric bearings are a wide choice in terms of bearing as they are cost-effective and safe for usage. However, the components require professional testing and prototyping for usage in the bridge production. This is why the infrastructure and construction companies are using 3D simulation software to improve the testing process. Bridge bearings can be made of elastomeric materials that help stimulate and provide insights about factors like compression with rotation and shearing.

          Such testing helps with observing the effects and relation of various bridge components with each other, which is greatly important for understanding the load-carrying capacity of a bridge.

          The production of elastomeric bearings with cutting-edge technology will play a great role in bridge safety, longevity, and dependability.

           Importance of testing on elastomeric bridge bearings performance

          To enhance and improve the overall performance and reliability of elastomeric bearings, the manufacturers are now performing extensive testing to ensure the bearings comply with the local regulations. As per the reports, testing has shown the use of elastomeric bearings to greatly increase stress-handling capability. The report showed that the bridge failures occurred only when the bridge’s load-carrying capacity was increased 26 times more than the allowed limit. Thus, this shows elastomeric bearings offer greater reliability in terms of vertical performance.

          When talking about shearing, elastomeric bearings are largely dependent on the fabrication conditions. As per the test, the bearings are at high risk of failure when the internal rubber layers were developed with a single rubber layer. Thus, the bearings must be used with complementing seismic devices, which will help increase the shear performance of the bearings. The practice of including multiple rubber parts has greatly increased the failure rate and is discouraged across the industry.

          Customization in structural bearing assemblies

          The bearings are used for different purposes. This is why elastomeric bridge bearing manufacturers have considered customizing molds to use neoprene and natural rubber to the best. The customizations are primarily classified into laminated, non reinforce, and sliding options. However, of all three, the reinforced elastomeric bridge bearings are widely used in instances where the stress like load and rotation are minimum and horizontal deflection. The cost of these bearings, when compared to the other, is relatively inexpensive.

          The sliding elastomeric bridge bearings are highly used for bridge projects with a large magnitude of horizontal displacement. In such cases sliding elastomeric bearings is a cost-effective solution that helps add lower fractions sliding surface, enabling the unlimited horizontal displacement without any damage or impact on the bearing assembly structure height.

          The two parts of sliding elastomeric bearing include the upper component made up of steel load plates integrated with the superstructure with a steel sheet. In contrast, the lower part of the structure is made up of low friction PTFE bridge bearing surface, integrated into a carbon base or steel sheet. The structure is then fixed to the elastomeric bearing, which finally is fixed to the load plate.

          The laminated elastomeric bearings come with wear-resistant steel plates placed inside the structure, which greatly helps improve the vertical load-bearing abilities and horizontal deflection. It is efficiently handled by the bearing device. Here the steel plates are attached with the rubber vulcanization for generating alternating layers of elastomer. Thus, the laminated drawings offer great scope for customizations.

          Contact a good Elastomeric bearing Manufacturer for quality purchase

          Elastomeric bearings have shown great performance. The bridge bearing industry is consequently coming up with quantitative investigation for identifying and developing better solutions that play a self-adaptive role. With all the details, the importance of elastomeric bearings during bridge construction is clear. Thus, you must ensure to make the purchase of the bearing from a good manufacturer as this will guarantee better support and performance. You can rely on DECG International to make a purchase of fairly priced yet high-quality elastomeric bearings. Our company develops the best bearings which will fulfill the desired application. We use top-quality materials for manufacturing our products. No matter the type of bearing you want for the construction purpose, we have got it all to meet all your requirements at a fair rate.


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