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What Is a Beam Bridge? | Types of Beam Bridges

Beam Bridge

Table of Contents

  • Introduction of Beam Bridge
  • What Is a Beam Bridge?
  • Types of Beam Bridges

Introduction of Beam Bridge

A beam bridge is a structure in which a road is built over it without physical obstruction (such as water body, valley, road, or rail ).

The function of the beam bridge is to pass through the barrier. A beam bridge should be built where it is difficult or impossible to get from one place to another.

Many different designs of bridges serve a specific purpose. Bridges are built for a specific purpose in different situations. Bridge designs vary depending on various factors, such as the work of the bridge, the construction of the bridge, and its location. In addition, it depends on the material used to build the bridge and its quality.

Also Read: What Is Zero Force Member? | Identification of Zero Force Members in Truss | Advantage of Zero Force Member

What Is a Beam Bridge?

The Beam Bridge is also known as the Second Stringer Bridge. The design for this type of beam is fairly simple structural. It is supported by an abutment or pier at each end.

A beam bridge is a commonly used bridge. A Beam bridge is a type of girder bridge. The bridge’s main purpose is to provide a way to go from one end to the other.

Beam bridge is the simplest and cheapest type of bridge.

The most basic form of beam bridge consists of a horizontal beam, supported by piers or abutments at each end. In this type of bridge, the weight of the beam pushes directly down on the pillars or abutment.

This type of beam should be strong enough not to bend under force due to its own weight and traffic. When compression force is applied to a load beam. Then the top edge of the beam feels compression. And tension force is applied to the bottom edge.

At the beginning of the bridge, simple beam bridges were made of wooden planks or stone slabs.

Bridges in modern infrastructure are usually made of steel or reinforced concrete or a combination of both. Materials like solid reinforced, precast concrete or post-tensioned, etc. can be used. Modern bridges include girder, plate girder, and girder bridge, etc. in beam bridge.

Beams can be used for different spans in bridges. Beam bridges are used in some viaducts. Like the Fungjiang Bridge in China, it is made from various beams supplied on the pier.

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Types of Beam Bridges

Types of Beam Bridges

 

Beam bridges are categorized according to the criteria and as required in different situations. Which are as follows.

# Based on the Geometry

  • Straight Beam Bridge
  • Curved Beam Bridge
  • Tapered Beam Bridge

# Based on the Shape of the Cross-Section of the Bridge

  • I-Beam Bridge
  • T-Beam Bridge
  • C-Beam Bridge

1. Based on the Geometry

  • A Straight Beam, Curved Beam Bridge

Bending moment and shear force are generated depending on the shape of the straight beam. When a curved beam produces shear force, bending moment, and torsion load according to its shape.

  • Tapered Beam

This type of beam is designed to analyze the distribution of stress and displacement. In addition, a tapered beam is constructed subject to the tip-bending girder.

Also Read: What Are Weep Holes? | Purpose of Weep Holes | Advantage & Disadvantage of Weep Holes

2. Based on the Shape of the Cross-Section of the Bridge

  • I-Beam Bridge

I-Beam is economical and pre-fabricated. Which is made from material made from ms steel. The horizontal components of the eye beam are fixed with flanges on the vertical member.

  • T-Beam Bridge

In a T-shaped bridge, the top is held as a flange or compression member to resist compressive stress. The shear in the web portion below the compression flange resists stress and resists forces such as compression and tension.

  • C-Beam Bridge

C-beams are also called channel beams. Channel beams can be made from materials like concrete, steel, and heavy wood, etc. c beam is carried by channel beams for load-carrying action in the bridge.

Also Read: What Is the Estimate? | Type of Estimate | Advantage & Disadvantage of Estimate

How Does a Beam Bridge Works?

The beam is formed by the component of the horizontal beam in the bridge. The load coming from the beam bridge pushes the pier. The pier transfers the load coming from the bridge to the base due to heavy traffic.

The total weight of the beam in the beam bridge is the pressure on the support. The beam should be strong enough to withstand its own weight and the force coming through the movement of traffic. The strength of the beam bridge depends on the span between the two pillars.

The structure of the bridge is classified into three parts.

  • Substructure
  • Superstructure
  • Deck of the Bridge

1. Substructure

This structure includes foundations like a pier, abutment, pile, etc. The weight of the bridge through the base transfers the load into the underground.

2. Superstructure

The superstructure of the bridge is the support beams in the bridge which are installed between the two supports.

3. Deck of the Bridge

The function of the bridge deck is to carry the force generated due to the speed of traffic from one end to the other.

Also Read: Light weight Concrete | Properties of Lightweight Concrete | Type of Lightweight Concrete | Uses of Lightweight Concrete

Advantage of Beam Bridge

  1. The beam bridge is very useful and easy for short spans.
  2. The method of constructing a beam bridge is simple and straightforward.
  3. The beam bridge is used for the pathway in the railway station.
  4. The beam bridge can be used by increasing the number of beams on the piers for long distances.
  5. This type of beam is formed in the part between the truss bridge and the arch bridges.
  6. Form Beam Bridge is used for short-term beam bridges. Which is the lowest cost-effective type of beam bridge construction
  7. This type of beam is formed between abutments or pillars where the gaps are parallel to the traffic direction.

Also Read: Sheep Foot Roller | Characteristics of Sheep Foot Roller | Advantage & Disadvantages of the Sheep Foot Roller

Disadvantage of Beam Bridge

Beam bridges also prove to be expensive for short spans. Because it uses expensive steel and concrete as building materials. Which is very expensive.

Supporting a beam bridge proves to be very expensive when intended for use for very long spans.

Also Read: Cantilever Beam | Advantages of a Cantilever Beam | Disadvantage of the Cantilever Beam


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