Introduction

Deep beams are structural elements with a small span-to-depth ratio, which can be found in various applications such as transfer girders, corbels, and shear walls. The effective span of a deep beam is an essential parameter in its design.

Defining Effective Span of Deep Beam

The effective span of a deep beam is defined as the distance between the centers of supports that produce the maximum bending moment in the beam. This distance is used to calculate the design moment and shear forces in the beam.

Calculation of Effective Span

There are two methods for calculating the effective span of a deep beam:

1. Centre to Centre Distance between Supports: This method involves measuring the distance between the centers of the supports that produce the maximum bending moment. This distance is taken as the effective span.

2. 1.15 Times of Clear Span: This method involves multiplying the clear span of the beam by 1.15. The clear span is the distance between the faces of the supports. The effective span is taken as the smaller of the two values calculated using these methods.

Selection of Effective Span

The effective span of a deep beam is selected based on the following factors:

1. The actual span of the beam
2. The location and number of supports
3. The loading conditions

Conclusion

The effective span of a deep beam is an essential parameter in its design. It is calculated based on the distance between the centers of the supports that produce the maximum bending moment or by multiplying the clear span by a factor of 1.15. The effective span is selected based on the actual span of the beam, the location and number of supports, and the loading conditions.

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