**Influence Line Diagram **

Live loads are defined as those which can vary both in their magnitude and location. Live loads are primary concern while designing a bridge or any structure where the load moves along the span of the structure.

To understand the behaviour of structure due to live load or moving load, it is necessary to understand the concept of influence line.

An Influence line represents the variation of structural response
function (support reaction, shear force, bending moment or
deflection etc.) due to change in the position of a concentrated
load on the span (such as bridges, cranes, conveyor etc.). A plot of
the influence line vs the load position is known as
influence line
diagram.

It is also noticed that all statically determinate beams will have influence lines which are linear. Click on the following links to know more about influence line.

**Procedure for developing influence line diagrams**

**
Applications of influence line diagram**

Bending Moment Calculator

Calculate bending moment & shear force for simply supported beam

Moment of Inertia Calculator

Calculate moment of inertia of plane sections e.g. channel, angle, tee etc.

Reinforced Concrete Calculator

Calculate the strength of Reinforced concrete beam

Moment Distribution Calculator

Solving indeterminate beams

Deflection & Slope Calculator

Calculate deflection and slope of simply supported beam for many load cases

Fixed Beam Calculator

Calculation tool for beanding moment and shear force for Fixed Beam for many load cases

BM & SF Calculator for Cantilever

Calculate SF & BM for Cantilever

Deflection & Slope Calculator for Cantilever

For many load cases of Cantilever

Overhanging beam calculator

For SF & BM of many load cases of overhanging beam

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