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Different Types of Loads on Bridges

Distinct sorts of loads on bridges are explained in that article. Accurate recognition of the load to be contemplated throughout the design as well as construction is essential.

There’re really awful incidents worldwide that lead to collapse of bridges or future changes were conducted to make it appropriate to utilize. The Millennium Bridge - London is amongs the examples that required changes post construction because of the vibration concerns.

Initially, sorts of bridges are concisely discussed ahead of describing the sorts of loads on bridges.

  • Cantilever Bridge
  • Beam Bridges
  • Suspension Bridges
  • Arch Bridge
  • Truss Bridges

Sorts of Loads on Bridges: Distinct sorts of loads on the bridges are explained fully. It includes the dead loads, live loads, as well as additional appropriate sorts of loads.

Dead Load: That is a famous load. Furthermore, it’s the own weight of the structure. Along with the own weight of the structure, there’re additional sorts of loads like superimposed load.

Moreover, weights apart from the self-weight of the structural elements of the bridge could be contemplated as superimposed dead loads.

Furthermore, concreting fillings, leveling concretes, finishing concretes, and so on can be contemplated as super imposed dead loads.

Live Loads: Generally there’re 2 sorts of live loads are contemplated according to the BS 5400 Part 2.

  • HB Loads
  • HA Loads (uniform load as well as knife-edge load).

Longitudinal Loads: Longitudinal loads are because of the traction or breaking is contemplated within the design.

  • There’re HA as well as HB sort longitudinal loads.
  • HA sort nominal load is equal to 8 kN/m x Loaded length + 200 kN ≤ 700 kN
  • HB sort nominal load is equal to 25% of nominal HB load.
  • The estimations on the basis of BS 5400 Part 2: 1978. Furthermore, there might be slit variation within the values in the new standards.

Skidding Loads – Horizontal Load – Accidental Load: That load must be contemplated as like the HA loads.

  • Nominal Skikkding Load is equal to 250kN
  • That load must beutilized paralleling the road surface, as well as it would be in a direction.
  • Furthermore, it must be utilized on 1 notional lane simply.

Centrifugal Load: That not usually contemplate load in bridge design.

  • Because of several factors, bridges are averted mainly.
  • The centrifugal load can be computed from the subsequent equation.
  • Fc is equal to 30000 / (r + 150), force in kN
  • Wherein Fc is the centrifugal force as well as r is the radius of the lane.

Wind Loads: There’re equations specified in BS 5400 Part 2 to compute the wind loads.

Along with the BS 5400 or according to the local standards, wind loads on the bridge can be computed.

To get more details, go through the following video tutorial.

Lecturer: Kpstructures

Download Bridges and their Types in PDF

Different Types of Loads on Bridges