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 important to understand the difference between influence
line diagram and the shear or moment diagram. Influence line represent the
effect of moving load only at a specified loaction on a member,
while shear and moment diagrams represent the effect of dead load
(fixed load) at all point along the axis of the structural member.
It is important to understand the difference between influence line diagram and the shear or moment diagram. Influence line represent the effect of moving load only at a specified loaction on a member, while shear and moment diagrams represent the effect of dead load (fixed load) at all point along the axis of the structural member.
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.
You can also use the following calculators for Moving Load Analysis
Stress Transformation Calculator
Calculate Principal Stress, Maximum shear stress and the their planes
Calculator for Moving Load Analysis
To determine Absolute Max. B.M. due to moving loads.
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
Civil Engineering Quiz
Test your knowledge on different topics of Civil Engineering
Research Papers, Thesis and Dissertation
List of skyscrapers of the world
Containing Tall buildings worldwide
Containing List of civil engineering conferences, seminar and workshops
Profile of Civil Engineers
Get to know about distinguished Civil Engineers
Worldwide Civil Engineers Professional Societies
Keep visiting for getting updated or Join our mailing list
PleaseTell your Friends about us if you find our website useful