Stiffness and Flexibility Methods of Structural Analysis

By Sachin Singh|Updated : August 23rd, 2018

Stiffness and Flexibility Method

Flexibility

The flexibility of a structure is defined as the displacement caused by a unit force

image001

where, f = Flexibility, δ = Displacement

P = Force, θ = Rotation, M = Moment

Stiffness

The stiffness is defined as the force required to produce a unit displacement.

image002 where, k = stiffness

image003

From Maxwell Reciprocal Theorem

Where

image004

Useful Results

image005

image006

 

Difference between Force Method and Displacement Method

image007

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Sachin SinghSachin SinghMember since Apr 2017
Civil Engineering from NIT Calicut. Community Manager for ESE, GATE, SSC JE & other exams.
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Comments

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jain Ulabudeen
Really helpful thanks☺
Sushil More

Sushil MoreDec 10, 2016

Formula link is not supporting
jadhav krishnanayak
Plz any one share problems on flexible & stiffness method
Richa Chaturvedi
Is this sufficient??
Salman SHAIKH
@Vishwajeet Sinha sir I m stuck in SOM revision .
How to revise frequently?
Plzzzzz tell me

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